Add SimpleAudioSample driver. (#577)

* Add SimpleAudioSample driver. * Fixed outdated copyrights and updated readme. * Added Filters as a dependency for Main and defined FileDigestAlgorithm as SHA256.
author: judzmura <[email protected]> 2021-03-01 13:12:34 -0800
committer: GitHub <[email protected]> 2021-03-01 13:12:34 -0800
commit: 9a2e9aecb9135e782c434e617f57bfbdf9d8f2fd (patch)
tree: c67dd7a72a15a8d72c7bb6c6e19c1086d5e15f08
parent: 6c41d837b87a0b70fe5dcee78baeba4ef28c45ad (diff)
46 files changed, 17187 insertions, 0 deletions
diff --git a/audio/simpleaudiosample/Package/package.VcxProj b/audio/simpleaudiosample/Package/package.VcxProj
new file mode 100644
index 00000000..7d791164
--- /dev/null
+++ b/audio/simpleaudiosample/Package/package.VcxProj
@@ -0,0 +1,103 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|ARM64">
+      <Configuration>Debug</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|ARM64">
+      <Configuration>Release</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\Source\Main\Main.vcxproj">
+      <Project>{E4DF0EEE-D35B-47F2-A9B1-41EA97C465FF}</Project>
+    </ProjectReference>
+  </ItemGroup>
+  <PropertyGroup Label="PropertySheets">
+    <PlatformToolset>WindowsKernelModeDriver10.0</PlatformToolset>
+    <ConfigurationType>Utility</ConfigurationType>
+    <DriverType>Package</DriverType>
+    <DisableFastUpToDateCheck>true</DisableFastUpToDateCheck>
+    <Configuration>Debug</Configuration>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{830B14D5-0E32-4F9E-AEFA-4C9F6FC13C2A}</ProjectGuid>
+    <SampleGuid>{E9D167E6-E633-4284-8F02-FF86DF3B6D7F}</SampleGuid>
+    <RootNamespace>$(MSBuildProjectName)</RootNamespace>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>true</UseDebugLibraries>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>false</UseDebugLibraries>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>true</UseDebugLibraries>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'" Label="Configuration">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>true</UseDebugLibraries>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>false</UseDebugLibraries>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'" Label="Configuration">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>false</UseDebugLibraries>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup />
+  <PropertyGroup>
+    <DebuggerFlavor>DbgengKernelDebugger</DebuggerFlavor>
+    <ImportToStore>False</ImportToStore>
+    <InstallMode>None</InstallMode>
+    <HardwareIdString />
+    <CommandLine />
+    <ScriptPath />
+    <DeployFiles />
+    <ScriptName />
+    <ScriptDeviceQuery>%PathToInf%</ScriptDeviceQuery>
+    <EnableVerifier>False</EnableVerifier>
+    <AllDrivers>False</AllDrivers>
+    <VerifyProjectOutput>True</VerifyProjectOutput>
+    <VerifyDrivers />
+    <VerifyFlags>133563</VerifyFlags>
+  </PropertyGroup>
+  <ItemDefinitionGroup>
+	<DriverSign>
+	  <FileDigestAlgorithm>SHA256</FileDigestAlgorithm>
+	</DriverSign>
+  </ItemDefinitionGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
diff --git a/audio/simpleaudiosample/Package/package.VcxProj.Filters b/audio/simpleaudiosample/Package/package.VcxProj.Filters
new file mode 100644
index 00000000..63b75548
--- /dev/null
+++ b/audio/simpleaudiosample/Package/package.VcxProj.Filters
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Source Files">
+      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx;*</Extensions>
+      <UniqueIdentifier>{0924612D-FBA7-477E-BBB9-B3B6EA7C6B03}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="Header Files">
+      <Extensions>h;hpp;hxx;hm;inl;inc;xsd</Extensions>
+      <UniqueIdentifier>{97311738-0AD8-4F7E-AC88-9C9BEAF53AEE}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="Resource Files">
+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms;man;xml</Extensions>
+      <UniqueIdentifier>{8DC1C4F0-C285-400E-A983-77A339891354}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="Driver Files">
+      <Extensions>inf;inv;inx;mof;mc;</Extensions>
+      <UniqueIdentifier>{9F086F34-79D2-4FAA-87FD-C2DBEFCED0BA}</UniqueIdentifier>
+    </Filter>
+  </ItemGroup>
+</Project>
+\ No newline at end of file
diff --git a/audio/simpleaudiosample/README.md b/audio/simpleaudiosample/README.md
new file mode 100644
index 00000000..5309626a
--- /dev/null
+++ b/audio/simpleaudiosample/README.md
@@ -0,0 +1,133 @@
+---
+page_type: sample
+description: "The Microsoft Simple Audio Sample Device Driver shows how to develop a simple WDM audio driver that exposes support for two basic audio devices (a speaker and microphone array).”
+languages:
+- cpp
+products:
+- windows
+- windows-wdk
+---
+
+# Simple Audio Sample Device Driver
+
+## Introduction
+
+The Microsoft Simple Audio Sample Device Driver shows how to develop a simple WDM audio driver that exposes support for two basic audio devices (a speaker and microphone array). These audio devices are embedded in the system (not pluggable) and the driver uses WaveRT for rendering these devices. The driver also uses a "virtual audio device" instead of an actual hardware-based adapter.
+
+Driver developers can use the framework in this sample to provide support for various audio devices without concern for hardware dependencies. The framework includes implementations of the following interfaces:
+
+- The CAdapterCommon interface gives the miniports access to virtual mixer hardware. It also implements the **IAdapterPowerManagement** interface.
+
+- The CMiniportTopologySimpleAudioSample interface is the base class for all sample topologies. It has very basic common functions. In addition, this class contains common topology property handlers.
+
+The following table shows the contents of the various subdirectories of this sample.
+
+| Directory | Description |
+| --- | --- |
+| Source | Contains all of the source code for the Simple Audio Sample driver. |
+| Filters | Contains the definitions of the wave and topology filters of the endpoints that are present in the Simple Audio Sample driver (speaker and microphone array). |
+| Main | Contains the core functionality of the driver. |
+| Utilities | Contains helper files that provide additional functionality, such as a test tone generator and an audio file reader. |
+
+## Build the sample
+
+If you simply want to build this sample driver and don't intend to run or test it, then you do not need a target computer (also called a test computer). If, however, you would like to deploy, run and test this sample driver, then you need a second computer that will serve as your target computer. Instructions are provided in the **Run the sample** section to show you how to set up the target computer - also referred to as *provisioning* a target computer.
+
+Perform the following steps to build this sample driver.
+
+### 1. Open the driver solution in Visual Studio
+
+In Microsoft Visual Studio, Click **File** \> **Open** \> **Project/Solution...** and navigate to the folder that contains the sample files (for example, *C:\Windows-driver-samples\audio\SimpleAudioSample*). Double-click the *SimpleAudioSample* solution file.
+
+In Visual Studio locate the Solution Explorer. (If this is not already open, choose **Solution Explorer** from the **View** menu.) In Solution Explorer, you can see one solution that has five projects.
+
+### 2. Set the sample's configuration and platform
+
+In Solution Explorer, right-click **Solution ‘SimpleAudioSample’ (5 of 5 projects)**, and choose **Configuration Manager**. Make sure that the configuration and platform settings are the same for the five projects. By default, the configuration is set to **Debug**, and the platform is set to **Win32** for all the projects. If you make any configuration and/or platform changes for one project, you must make the same changes for all the remaining projects.
+
+### 3. Build the sample using Visual Studio
+
+In Visual Studio, click **Build** \> **Build Solution**.
+
+### 4. Locate the built driver package
+
+In File Explorer, navigate to the folder that contains the sample files. For example, you would navigate to *C:\\Windows-driver-samples\\audio\\SimpleAudioSample*, if that's the folder you specified in the preceding Step 1.
+
+In the folder, the location of the driver package varies depending on the configuration and platform settings that you selected in the **Configuration Manager**. For example, if you left the default settings unchanged, then the built driver package will be saved to a folder named *Debug* inside the same folder as the sample files. Double-click the folder for the built driver package, and then double-click the folder named *package*.
+
+The package should contain these files:
+
+| File | Description |
+| --- | --- |
+| SimpleAudioSample.sys | The driver file. |
+| SimpleAudioSample.cat | A signed catalog file, which serves as the signature for the entire package. |
+| SimpleAudioSample.inf | A non-componentized information (INF) file that contains information needed to install the driver. |
+
+## Run the sample
+
+The computer where you install the driver is called the *target computer* or the *test computer*. Typically this is a separate computer from the computer on which you develop and build the driver package. The computer where you develop and build the driver is called the *host computer*.
+
+The process of moving the driver package to the target computer and installing the driver is called *deploying* the driver. You can deploy the SimpleAudioSample driver automatically or manually.
+
+### Prepare the target computer
+
+First of all, install the latest [Windows Driver Kit](https://docs.microsoft.com/windows-hardware/drivers/download-the-wdk) (WDK) on the target computer.
+
+Before you manually deploy a driver, you must prepare the target computer by turning on test signing and by installing a certificate. You also need to locate the DevCon tool in your WDK installation. After that you're ready to run the built driver sample.
+
+Open a Command Prompt window as Administrator. Then enter the following command:
+
+`bcdedit /set TESTSIGNING ON`
+
+and reboot the target computer.
+
+> [!IMPORTANT]
+> Before using BCDEdit to change boot information you may need to temporarily suspend Windows security features such as BitLocker and Secure Boot on the test PC.
+
+Re-enable these security features when testing is complete and appropriately manage the test PC, when the security features are disabled.
+
+After rebooting, navigate to the Tools folder in your WDK installation and locate the DevCon tool. For example, look in the following folder:
+
+C:\\Program Files (x86)\\Windows Kits\\10\\Tools\\x64\\devcon.exe
+
+Copy *devcon.exe* to a folder on the target computer where it is easier to find. For example, create a *C:\\Tools* folder and copy *devcon.exe* to that folder.
+
+Create a folder on the target for the built driver package (for example, *C:\\SimpleAudioSampleDriver*). Copy all the files from the built driver package on the host computer and save them to the folder that you created on the target computer.
+
+Create a folder on the target computer for the certificate created by the build process. For example, you could create a folder named *C:\\Certificates* on the target computer, and then copy *package.cer* to it from the host computer. You can find this certificate in the same folder on the host computer, as the *package* folder that contains the built driver files. On the target computer, right-click the certificate file, and click **Install**, then follow the prompts to install the test certificate.
+
+If you need more detailed instructions for setting up the target computer, see [Preparing a Computer for Manual Driver Deployment](https://docs.microsoft.com/windows-hardware/drivers/develop/preparing-a-computer-for-manual-driver-deployment).
+
+#### A note on signatures
+
+Since most of these binary files are executed in kernel mode, it is important that they are signed and, optionally, to have a kernel debugger attached.
+
+Without any signature or kernel debugger, the driver will not be installed in the target computer. With a kernel debugger attached, the driver can be installed and the driver files (.sys extension) would be loaded. The only way of installing and executing the driver sample without a kernel debugger attached is to have both the .sys and .cat files signed with a trusted certificate.
+
+For more information on the subject, see [Driver signing](https://docs.microsoft.com/windows-hardware/drivers/install/driver-signing).
+
+### Install the driver
+
+To install SimpleAudioSample.inf, open a Command Prompt window as administrator on the target computer, then navigate to your driver package folder and enter the following command:
+
+`devcon install SimpleAudioSample.inf Root\SimpleAudioSample` 
+
+If you get an error message about *devcon* not being recognized, try adding the path to the *devcon* tool. For example, if you copied it to a folder called *C:\\Tools*, then try using the following command:
+
+`C:\\tools\\devcon install SimpleAudioSample.inf Root\SimpleAudioSample`
+
+This installs the Simple Audio Sample driver with a hardware ID of "Root\SimpleAudioSample".
+
+Once the INF file is installed, a device should appear in Device Manager named *Microsoft Virtual Audio Device (WDM) - Simple Audio Sample*.
+
+After successfully installing the sample driver, you're now ready to test it.
+
+For more detailed instructions, see [Provision a computer for driver deployment and testing](https://docs.microsoft.com/windows-hardware/drivers/gettingstarted/provision-a-target-computer-wdk-8-1).
+
+### Test the driver
+
+On the target computer, in a Command Prompt window, enter **devmgmt.msc** to open Device Manager. In Device Manager, on the **View** menu, choose **Devices by type**. In the device tree, locate *Virtual Audio Device (WDM) – Simple Audio Sample*. This is typically under the **Sound, video and game controllers** node.
+
+On the target computer, open Control Panel and navigate to **Hardware and Sound** \> **Manage audio devices**. In the Sound dialog box, select the speaker icon labeled as *Virtual Audio Device (WDM) – Simple Audio Sample*, then click **Set Default**, but do not click **OK**. This will keep the Sound dialog box open.
+
+Locate an MP3 or other audio file on the target computer and double-click to play it. Then in the Sound dialog box, verify that there is activity in the volume level indicator associated with the *Virtual Audio Device (WDM) – Simple Audio Sample* driver.
diff --git a/audio/simpleaudiosample/SimpleAudioSample.sln b/audio/simpleaudiosample/SimpleAudioSample.sln
new file mode 100644
index 00000000..407838ba
--- /dev/null
+++ b/audio/simpleaudiosample/SimpleAudioSample.sln
@@ -0,0 +1,113 @@
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.30503.244
+MinimumVisualStudioVersion = 12.0
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Package", "Package", "{FA56D96B-290B-4C73-A5E1-02C1861D3224}"
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Filters", "Filters", "{952A7CB1-E516-44AA-AC38-4AEED9874C41}"
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Utilities", "Utilities", "{0B4B8E51-20A8-43A4-A8DA-42FF90D628AC}"
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Inc", "Inc", "{C65091AE-E5B7-4359-8984-55852792406E}"
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Main", "Main", "{C06F6070-75EE-4F57-8D35-4AC2AB08D029}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "package", "Package\package.VcxProj", "{830B14D5-0E32-4F9E-AEFA-4C9F6FC13C2A}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "Filters", "Source\Filters\Filters.vcxproj", "{771312CF-E5A2-4676-8142-86CEBDF99E2B}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "Utilities", "Source\Utilities\Utilities.vcxproj", "{33E61864-6F2C-4F9F-BE70-8F8985A4F283}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "Inc", "Source\Inc\Inc.vcxproj", "{4B664BA5-057A-41B8-B365-2C99065C4DFA}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "Main", "Source\Main\Main.vcxproj", "{E4DF0EEE-D35B-47F2-A9B1-41EA97C465FF}"
+	ProjectSection(ProjectDependencies) = postProject
+		{33E61864-6F2C-4F9F-BE70-8F8985A4F283} = {33E61864-6F2C-4F9F-BE70-8F8985A4F283}
+		{771312CF-E5A2-4676-8142-86CEBDF99E2B} = {771312CF-E5A2-4676-8142-86CEBDF99E2B}
+	EndProjectSection
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|ARM64 = Debug|ARM64
+		Debug|Win32 = Debug|Win32
+		Debug|x64 = Debug|x64
+		Release|ARM64 = Release|ARM64
+		Release|Win32 = Release|Win32
+		Release|x64 = Release|x64
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{830B14D5-0E32-4F9E-AEFA-4C9F6FC13C2A}.Debug|ARM64.ActiveCfg = Debug|ARM64
+		{830B14D5-0E32-4F9E-AEFA-4C9F6FC13C2A}.Debug|ARM64.Build.0 = Debug|ARM64
+		{830B14D5-0E32-4F9E-AEFA-4C9F6FC13C2A}.Debug|Win32.ActiveCfg = Debug|Win32
+		{830B14D5-0E32-4F9E-AEFA-4C9F6FC13C2A}.Debug|Win32.Build.0 = Debug|Win32
+		{830B14D5-0E32-4F9E-AEFA-4C9F6FC13C2A}.Debug|x64.ActiveCfg = Debug|x64
+		{830B14D5-0E32-4F9E-AEFA-4C9F6FC13C2A}.Debug|x64.Build.0 = Debug|x64
+		{830B14D5-0E32-4F9E-AEFA-4C9F6FC13C2A}.Release|ARM64.ActiveCfg = Release|ARM64
+		{830B14D5-0E32-4F9E-AEFA-4C9F6FC13C2A}.Release|ARM64.Build.0 = Release|ARM64
+		{830B14D5-0E32-4F9E-AEFA-4C9F6FC13C2A}.Release|Win32.ActiveCfg = Release|Win32
+		{830B14D5-0E32-4F9E-AEFA-4C9F6FC13C2A}.Release|Win32.Build.0 = Release|Win32
+		{830B14D5-0E32-4F9E-AEFA-4C9F6FC13C2A}.Release|x64.ActiveCfg = Release|x64
+		{830B14D5-0E32-4F9E-AEFA-4C9F6FC13C2A}.Release|x64.Build.0 = Release|x64
+		{771312CF-E5A2-4676-8142-86CEBDF99E2B}.Debug|ARM64.ActiveCfg = Debug|ARM64
+		{771312CF-E5A2-4676-8142-86CEBDF99E2B}.Debug|ARM64.Build.0 = Debug|ARM64
+		{771312CF-E5A2-4676-8142-86CEBDF99E2B}.Debug|Win32.ActiveCfg = Debug|Win32
+		{771312CF-E5A2-4676-8142-86CEBDF99E2B}.Debug|Win32.Build.0 = Debug|Win32
+		{771312CF-E5A2-4676-8142-86CEBDF99E2B}.Debug|x64.ActiveCfg = Debug|x64
+		{771312CF-E5A2-4676-8142-86CEBDF99E2B}.Debug|x64.Build.0 = Debug|x64
+		{771312CF-E5A2-4676-8142-86CEBDF99E2B}.Release|ARM64.ActiveCfg = Release|ARM64
+		{771312CF-E5A2-4676-8142-86CEBDF99E2B}.Release|ARM64.Build.0 = Release|ARM64
+		{771312CF-E5A2-4676-8142-86CEBDF99E2B}.Release|Win32.ActiveCfg = Release|Win32
+		{771312CF-E5A2-4676-8142-86CEBDF99E2B}.Release|Win32.Build.0 = Release|Win32
+		{771312CF-E5A2-4676-8142-86CEBDF99E2B}.Release|x64.ActiveCfg = Release|x64
+		{771312CF-E5A2-4676-8142-86CEBDF99E2B}.Release|x64.Build.0 = Release|x64
+		{33E61864-6F2C-4F9F-BE70-8F8985A4F283}.Debug|ARM64.ActiveCfg = Debug|ARM64
+		{33E61864-6F2C-4F9F-BE70-8F8985A4F283}.Debug|ARM64.Build.0 = Debug|ARM64
+		{33E61864-6F2C-4F9F-BE70-8F8985A4F283}.Debug|Win32.ActiveCfg = Debug|Win32
+		{33E61864-6F2C-4F9F-BE70-8F8985A4F283}.Debug|Win32.Build.0 = Debug|Win32
+		{33E61864-6F2C-4F9F-BE70-8F8985A4F283}.Debug|x64.ActiveCfg = Debug|x64
+		{33E61864-6F2C-4F9F-BE70-8F8985A4F283}.Debug|x64.Build.0 = Debug|x64
+		{33E61864-6F2C-4F9F-BE70-8F8985A4F283}.Release|ARM64.ActiveCfg = Release|ARM64
+		{33E61864-6F2C-4F9F-BE70-8F8985A4F283}.Release|ARM64.Build.0 = Release|ARM64
+		{33E61864-6F2C-4F9F-BE70-8F8985A4F283}.Release|Win32.ActiveCfg = Release|Win32
+		{33E61864-6F2C-4F9F-BE70-8F8985A4F283}.Release|Win32.Build.0 = Release|Win32
+		{33E61864-6F2C-4F9F-BE70-8F8985A4F283}.Release|x64.ActiveCfg = Release|x64
+		{33E61864-6F2C-4F9F-BE70-8F8985A4F283}.Release|x64.Build.0 = Release|x64
+		{4B664BA5-057A-41B8-B365-2C99065C4DFA}.Debug|ARM64.ActiveCfg = Debug|ARM64
+		{4B664BA5-057A-41B8-B365-2C99065C4DFA}.Debug|ARM64.Build.0 = Debug|ARM64
+		{4B664BA5-057A-41B8-B365-2C99065C4DFA}.Debug|Win32.ActiveCfg = Debug|Win32
+		{4B664BA5-057A-41B8-B365-2C99065C4DFA}.Debug|Win32.Build.0 = Debug|Win32
+		{4B664BA5-057A-41B8-B365-2C99065C4DFA}.Debug|x64.ActiveCfg = Debug|x64
+		{4B664BA5-057A-41B8-B365-2C99065C4DFA}.Debug|x64.Build.0 = Debug|x64
+		{4B664BA5-057A-41B8-B365-2C99065C4DFA}.Release|ARM64.ActiveCfg = Release|ARM64
+		{4B664BA5-057A-41B8-B365-2C99065C4DFA}.Release|ARM64.Build.0 = Release|ARM64
+		{4B664BA5-057A-41B8-B365-2C99065C4DFA}.Release|Win32.ActiveCfg = Release|Win32
+		{4B664BA5-057A-41B8-B365-2C99065C4DFA}.Release|Win32.Build.0 = Release|Win32
+		{4B664BA5-057A-41B8-B365-2C99065C4DFA}.Release|x64.ActiveCfg = Release|x64
+		{4B664BA5-057A-41B8-B365-2C99065C4DFA}.Release|x64.Build.0 = Release|x64
+		{E4DF0EEE-D35B-47F2-A9B1-41EA97C465FF}.Debug|ARM64.ActiveCfg = Debug|ARM64
+		{E4DF0EEE-D35B-47F2-A9B1-41EA97C465FF}.Debug|ARM64.Build.0 = Debug|ARM64
+		{E4DF0EEE-D35B-47F2-A9B1-41EA97C465FF}.Debug|Win32.ActiveCfg = Debug|Win32
+		{E4DF0EEE-D35B-47F2-A9B1-41EA97C465FF}.Debug|Win32.Build.0 = Debug|Win32
+		{E4DF0EEE-D35B-47F2-A9B1-41EA97C465FF}.Debug|x64.ActiveCfg = Debug|x64
+		{E4DF0EEE-D35B-47F2-A9B1-41EA97C465FF}.Debug|x64.Build.0 = Debug|x64
+		{E4DF0EEE-D35B-47F2-A9B1-41EA97C465FF}.Release|ARM64.ActiveCfg = Release|ARM64
+		{E4DF0EEE-D35B-47F2-A9B1-41EA97C465FF}.Release|ARM64.Build.0 = Release|ARM64
+		{E4DF0EEE-D35B-47F2-A9B1-41EA97C465FF}.Release|Win32.ActiveCfg = Release|Win32
+		{E4DF0EEE-D35B-47F2-A9B1-41EA97C465FF}.Release|Win32.Build.0 = Release|Win32
+		{E4DF0EEE-D35B-47F2-A9B1-41EA97C465FF}.Release|x64.ActiveCfg = Release|x64
+		{E4DF0EEE-D35B-47F2-A9B1-41EA97C465FF}.Release|x64.Build.0 = Release|x64
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(NestedProjects) = preSolution
+		{830B14D5-0E32-4F9E-AEFA-4C9F6FC13C2A} = {FA56D96B-290B-4C73-A5E1-02C1861D3224}
+		{771312CF-E5A2-4676-8142-86CEBDF99E2B} = {952A7CB1-E516-44AA-AC38-4AEED9874C41}
+		{33E61864-6F2C-4F9F-BE70-8F8985A4F283} = {0B4B8E51-20A8-43A4-A8DA-42FF90D628AC}
+		{4B664BA5-057A-41B8-B365-2C99065C4DFA} = {C65091AE-E5B7-4359-8984-55852792406E}
+		{E4DF0EEE-D35B-47F2-A9B1-41EA97C465FF} = {C06F6070-75EE-4F57-8D35-4AC2AB08D029}
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {6DB4FE19-4FE0-4DC4-B898-C46E01E6BDF4}
+	EndGlobalSection
+EndGlobal
diff --git a/audio/simpleaudiosample/Source/Filters/Filters.vcxproj b/audio/simpleaudiosample/Source/Filters/Filters.vcxproj
new file mode 100644
index 00000000..d8496aa8
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Filters/Filters.vcxproj
@@ -0,0 +1,264 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|ARM64">
+      <Configuration>Debug</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|ARM64">
+      <Configuration>Release</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{771312CF-E5A2-4676-8142-86CEBDF99E2B}</ProjectGuid>
+    <RootNamespace>$(MSBuildProjectName)</RootNamespace>
+    <KMDF_VERSION_MAJOR>1</KMDF_VERSION_MAJOR>
+    <Configuration Condition="'$(Configuration)' == ''">Debug</Configuration>
+    <Platform Condition="'$(Platform)' == ''">Win32</Platform>
+    <SampleGuid>{F51739CE-5253-42B5-9191-57F28B5842C6}</SampleGuid>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Label="Configuration" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>False</UseDebugLibraries>
+    <DriverTargetPlatform>Universal</DriverTargetPlatform>
+    <DriverType>KMDF</DriverType>
+    <PlatformToolset>WindowsKernelModeDriver10.0</PlatformToolset>
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'" Label="Configuration">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>False</UseDebugLibraries>
+    <DriverTargetPlatform>Universal</DriverTargetPlatform>
+    <DriverType>KMDF</DriverType>
+    <PlatformToolset>WindowsKernelModeDriver10.0</PlatformToolset>
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+  </PropertyGroup>
+  <PropertyGroup Label="Configuration" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>True</UseDebugLibraries>
+    <DriverTargetPlatform>Universal</DriverTargetPlatform>
+    <DriverType>KMDF</DriverType>
+    <PlatformToolset>WindowsKernelModeDriver10.0</PlatformToolset>
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'" Label="Configuration">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>True</UseDebugLibraries>
+    <DriverTargetPlatform>Universal</DriverTargetPlatform>
+    <DriverType>KMDF</DriverType>
+    <PlatformToolset>WindowsKernelModeDriver10.0</PlatformToolset>
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+  </PropertyGroup>
+  <PropertyGroup Label="Configuration" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>False</UseDebugLibraries>
+    <DriverTargetPlatform>Universal</DriverTargetPlatform>
+    <DriverType>KMDF</DriverType>
+    <PlatformToolset>WindowsKernelModeDriver10.0</PlatformToolset>
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+  </PropertyGroup>
+  <PropertyGroup Label="Configuration" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>True</UseDebugLibraries>
+    <DriverTargetPlatform>Universal</DriverTargetPlatform>
+    <DriverType>KMDF</DriverType>
+    <PlatformToolset>WindowsKernelModeDriver10.0</PlatformToolset>
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <PropertyGroup>
+    <OutDir>$(IntDir)</OutDir>
+  </PropertyGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
+  </ImportGroup>
+  <ItemGroup Label="WrappedTaskItems" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <TargetName>Filters</TargetName>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'">
+    <TargetName>Filters</TargetName>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <TargetName>Filters</TargetName>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">
+    <TargetName>Filters</TargetName>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <TargetName>Filters</TargetName>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <TargetName>Filters</TargetName>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </ResourceCompile>
+    <ClCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..;.</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc;.</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_NEW_DELETE_OPERATORS_</PreprocessorDefinitions>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <DisableSpecificWarnings>4595;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+    </ClCompile>
+    <Midl>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </Midl>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'">
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </ResourceCompile>
+    <ClCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..;.</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc;.</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_NEW_DELETE_OPERATORS_</PreprocessorDefinitions>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <DisableSpecificWarnings>4595;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+    </ClCompile>
+    <Midl>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </Midl>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </ResourceCompile>
+    <ClCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..;.</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc;.</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_NEW_DELETE_OPERATORS_</PreprocessorDefinitions>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <DisableSpecificWarnings>4595;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+    </ClCompile>
+    <Midl>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </Midl>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </ResourceCompile>
+    <ClCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..;.</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc;.</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_NEW_DELETE_OPERATORS_</PreprocessorDefinitions>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <DisableSpecificWarnings>4595;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+    </ClCompile>
+    <Midl>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </Midl>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </ResourceCompile>
+    <ClCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..;.</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc;.</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_NEW_DELETE_OPERATORS_</PreprocessorDefinitions>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <DisableSpecificWarnings>4595;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+    </ClCompile>
+    <Midl>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </Midl>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </ResourceCompile>
+    <ClCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..;.</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc;.</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_NEW_DELETE_OPERATORS_</PreprocessorDefinitions>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <DisableSpecificWarnings>4595;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+    </ClCompile>
+    <Midl>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </Midl>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="micarraytopo.cpp" />
+    <ClCompile Include="speakertopo.cpp" />
+  </ItemGroup>
+  <ItemGroup>
+    <Inf Exclude="@(Inf)" Include="*.inf" />
+    <FilesToPackage Include="$(TargetPath)" Condition="'$(ConfigurationType)'=='Driver' or '$(ConfigurationType)'=='DynamicLibrary'" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Exclude="@(None)" Include="*.txt;*.htm;*.html" />
+    <None Exclude="@(None)" Include="*.ico;*.cur;*.bmp;*.dlg;*.rct;*.gif;*.jpg;*.jpeg;*.wav;*.jpe;*.tiff;*.tif;*.png;*.rc2" />
+    <None Exclude="@(None)" Include="*.def;*.bat;*.hpj;*.asmx" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Exclude="@(ClInclude)" Include="*.h;*.hpp;*.hxx;*.hm;*.inl;*.xsd" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+</Project>
diff --git a/audio/simpleaudiosample/Source/Filters/Filters.vcxproj.Filters b/audio/simpleaudiosample/Source/Filters/Filters.vcxproj.Filters
new file mode 100644
index 00000000..b573243b
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Filters/Filters.vcxproj.Filters
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Source Files">
+      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx;*</Extensions>
+      <UniqueIdentifier>{75C3E63D-04EA-4EB3-B9F1-505497C51F71}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="Header Files">
+      <Extensions>h;hpp;hxx;hm;inl;inc;xsd</Extensions>
+      <UniqueIdentifier>{5E8F8D4C-2886-4109-9E78-CE5EA6DB4AC4}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="Resource Files">
+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms;man;xml</Extensions>
+      <UniqueIdentifier>{75D3016A-4ED8-4FAF-9817-394BE1112534}</UniqueIdentifier>
+    </Filter>
+  </ItemGroup>
+ <ItemGroup>
+    <ClCompile Include="*.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="*.h;*.hpp;*.hxx;*.hm;*.inl;*.xsd">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+  </ItemGroup>
+</Project>
diff --git a/audio/simpleaudiosample/Source/Filters/micarray1toptable.h b/audio/simpleaudiosample/Source/Filters/micarray1toptable.h
new file mode 100644
index 00000000..3bbd80f3
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Filters/micarray1toptable.h
@@ -0,0 +1,210 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    micarray1toptable.h
+
+Abstract:
+
+    Declaration of topology tables for the mic array.
+
+--*/
+
+#ifndef _SIMPLEAUDIOSAMPLE_MICARRAY1TOPTABLE_H_
+#define _SIMPLEAUDIOSAMPLE_MICARRAY1TOPTABLE_H_
+
+//
+// {6ae81ff4-203e-4fe1-88aa-f2d57775cd4a}
+DEFINE_GUID(MICARRAY1_CUSTOM_NAME,
+    0x6ae81ff4, 0x203e, 0x4fe1, 0x88, 0xaa, 0xf2, 0xd5, 0x77, 0x75, 0xcd, 0x4a);
+
+//=============================================================================
+static
+KSDATARANGE MicArray1TopoPinDataRangesBridge[] =
+{
+ {
+   sizeof(KSDATARANGE),
+   0,
+   0,
+   0,
+   STATICGUIDOF(KSDATAFORMAT_TYPE_AUDIO),
+   STATICGUIDOF(KSDATAFORMAT_SUBTYPE_ANALOG),
+   STATICGUIDOF(KSDATAFORMAT_SPECIFIER_NONE)
+ }
+};
+
+//=============================================================================
+static
+PKSDATARANGE MicArray1TopoPinDataRangePointersBridge[] =
+{
+  &MicArray1TopoPinDataRangesBridge[0]
+};
+
+//=============================================================================
+static
+PCPIN_DESCRIPTOR MicArray1TopoMiniportPins[] =
+{
+    // KSPIN_TOPO_MIC_ELEMENTS
+    {
+      0,
+      0,
+      0,                                              // InstanceCount
+      NULL,                                           // AutomationTable
+      {                                               // KsPinDescriptor
+        0,                                            // InterfacesCount
+        NULL,                                         // Interfaces
+        0,                                            // MediumsCount
+        NULL,                                         // Mediums
+        SIZEOF_ARRAY(MicArray1TopoPinDataRangePointersBridge),     // DataRangesCount
+        MicArray1TopoPinDataRangePointersBridge,                   // DataRanges
+        KSPIN_DATAFLOW_IN,                            // DataFlow
+        KSPIN_COMMUNICATION_NONE,                     // Communication
+        &KSNODETYPE_MICROPHONE_ARRAY,                 // Category
+        &MICARRAY1_CUSTOM_NAME,                       // Name
+        0                                             // Reserved
+      }
+    },
+
+    // KSPIN_TOPO_BRIDGE
+    {
+      0,
+      0,
+      0,                                              // InstanceCount
+      NULL,                                           // AutomationTable
+      {                                               // KsPinDescriptor
+        0,                                            // InterfacesCount
+        NULL,                                         // Interfaces
+        0,                                            // MediumsCount
+        NULL,                                         // Mediums
+        SIZEOF_ARRAY(MicArray1TopoPinDataRangePointersBridge),     // DataRangesCount
+        MicArray1TopoPinDataRangePointersBridge,                   // DataRanges
+        KSPIN_DATAFLOW_OUT,                           // DataFlow
+        KSPIN_COMMUNICATION_NONE,                     // Communication
+        &KSCATEGORY_AUDIO,                            // Category
+        NULL,                                         // Name
+        0                                             // Reserved
+      }
+    }
+};
+
+//=============================================================================
+static
+PCPROPERTY_ITEM MicArray1PropertiesVolume[] =
+{
+    {
+    &KSPROPSETID_Audio,
+    KSPROPERTY_AUDIO_VOLUMELEVEL,
+    KSPROPERTY_TYPE_GET | KSPROPERTY_TYPE_SET | KSPROPERTY_TYPE_BASICSUPPORT,
+    PropertyHandler_MicArrayTopology
+    }
+};
+
+DEFINE_PCAUTOMATION_TABLE_PROP(AutomationMicArray1Volume, MicArray1PropertiesVolume);
+
+//=============================================================================
+static
+PCPROPERTY_ITEM MicArray1PropertiesMute[] =
+{
+  {
+    &KSPROPSETID_Audio,
+    KSPROPERTY_AUDIO_MUTE,
+    KSPROPERTY_TYPE_GET | KSPROPERTY_TYPE_SET | KSPROPERTY_TYPE_BASICSUPPORT,
+    PropertyHandler_MicArrayTopology
+  }
+};
+
+DEFINE_PCAUTOMATION_TABLE_PROP(AutomationMicArray1Mute, MicArray1PropertiesMute);
+
+//=============================================================================
+static
+PCNODE_DESCRIPTOR MicArray1TopologyNodes[] =
+{
+    // KSNODE_TOPO_VOLUME
+    {
+      0,                              // Flags
+      &AutomationMicArray1Volume,     // AutomationTable
+      &KSNODETYPE_VOLUME,             // Type
+      &KSAUDFNAME_MIC_VOLUME          // Name
+    },
+    // KSNODE_TOPO_MUTE
+    {
+      0,                              // Flags
+      &AutomationMicArray1Mute,       // AutomationTable
+      &KSNODETYPE_MUTE,               // Type
+      &KSAUDFNAME_MIC_MUTE            // Name
+    }
+};
+
+C_ASSERT(KSNODE_TOPO_VOLUME == 0);
+C_ASSERT(KSNODE_TOPO_MUTE == 1);
+
+static
+PCCONNECTION_DESCRIPTOR MicArray1TopoMiniportConnections[] =
+{
+    //  FromNode,                 FromPin,                    ToNode,                 ToPin
+    {   PCFILTER_NODE,            KSPIN_TOPO_MIC_ELEMENTS,    KSNODE_TOPO_VOLUME,     1 },
+    {   KSNODE_TOPO_VOLUME,       0,                          KSNODE_TOPO_MUTE,       1 },
+    {   KSNODE_TOPO_MUTE,         0,                          PCFILTER_NODE,          KSPIN_TOPO_BRIDGE }
+};
+
+
+
+//=============================================================================
+static
+PCPROPERTY_ITEM MicArray1PropertiesTopoFilter[] =
+{
+    {
+        &KSPROPSETID_Jack,
+        KSPROPERTY_JACK_DESCRIPTION,
+        KSPROPERTY_TYPE_GET | KSPROPERTY_TYPE_BASICSUPPORT,
+        PropertyHandler_MicArrayTopoFilter
+    },
+    {
+        &KSPROPSETID_Jack,
+        KSPROPERTY_JACK_DESCRIPTION2,
+        KSPROPERTY_TYPE_GET | KSPROPERTY_TYPE_BASICSUPPORT,
+        PropertyHandler_MicArrayTopoFilter
+    },
+    {
+        &KSPROPSETID_Audio,
+        KSPROPERTY_AUDIO_MIC_ARRAY_GEOMETRY,
+        KSPROPERTY_TYPE_GET | KSPROPERTY_TYPE_BASICSUPPORT,
+        PropertyHandler_MicArrayTopoFilter
+    },
+    {
+        &KSPROPSETID_Audio,
+        KSPROPERTY_AUDIO_MIC_SNR,
+        KSPROPERTY_TYPE_GET | KSPROPERTY_TYPE_BASICSUPPORT,
+        PropertyHandler_MicArrayTopoFilter
+    },
+    {
+        &KSPROPSETID_Audio,
+        KSPROPERTY_AUDIO_MIC_SENSITIVITY2,
+        KSPROPERTY_TYPE_GET | KSPROPERTY_TYPE_BASICSUPPORT,
+        PropertyHandler_MicArrayTopoFilter
+    }
+};
+
+DEFINE_PCAUTOMATION_TABLE_PROP(AutomationMicArray1TopoFilter, MicArray1PropertiesTopoFilter);
+
+//=============================================================================
+static
+PCFILTER_DESCRIPTOR MicArray1TopoMiniportFilterDescriptor =
+{
+  0,                                            // Version
+  &AutomationMicArray1TopoFilter,               // AutomationTable
+  sizeof(PCPIN_DESCRIPTOR),                     // PinSize
+  SIZEOF_ARRAY(MicArray1TopoMiniportPins),      // PinCount
+  MicArray1TopoMiniportPins,                    // Pins
+  sizeof(PCNODE_DESCRIPTOR),                    // NodeSize
+  SIZEOF_ARRAY(MicArray1TopologyNodes),         // NodeCount
+  MicArray1TopologyNodes,                       // Nodes
+  SIZEOF_ARRAY(MicArray1TopoMiniportConnections),// ConnectionCount
+  MicArray1TopoMiniportConnections,             // Connections
+  0,                                            // CategoryCount
+  NULL                                          // Categories
+};
+
+#endif // _SIMPLEAUDIOSAMPLE_MICARRAY1TOPTABLE_H_
diff --git a/audio/simpleaudiosample/Source/Filters/micarraytopo.cpp b/audio/simpleaudiosample/Source/Filters/micarraytopo.cpp
new file mode 100644
index 00000000..66cc7d89
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Filters/micarraytopo.cpp
@@ -0,0 +1,825 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    micarraytopo.cpp
+
+Abstract:
+
+    Implementation of topology miniport for the mic array.
+
+--*/
+
+#pragma warning (disable : 4127)
+
+#include "definitions.h"
+#include "endpoints.h"
+#include "common.h"
+#include "kshelper.h"
+#include "micarraytopo.h"
+#include "micarray1toptable.h"
+
+constexpr float MICARRAY_SENSITIVITY = -46.5f;
+constexpr float MICARRAY_SENSITIVITY2 = -23.5f;
+constexpr float MICARRAY_SNR = 66.0f;
+
+constexpr inline LONG FloatToFixedPoint16_16(float fl)
+{
+    return (static_cast<LONG>((fl) * (65536.0f)));
+}
+
+#pragma code_seg("PAGE")
+
+//=============================================================================
+NTSTATUS
+CreateMicArrayMiniportTopology
+(
+    _Out_           PUNKNOWN* Unknown,
+    _In_            REFCLSID,
+    _In_opt_        PUNKNOWN                                UnknownOuter,
+    _In_            POOL_FLAGS                              PoolFlags,
+    _In_            PUNKNOWN                                UnknownAdapter,
+    _In_opt_        PVOID                                   DeviceContext,
+    _In_            PENDPOINT_MINIPAIR                      MiniportPair
+)
+/*++
+
+Routine Description:
+
+    Creates a new topology miniport.
+
+Arguments:
+
+  Unknown -
+
+  RefclsId -
+
+  UnknownOuter -
+
+  PoolType -
+
+  UnknownAdapter -
+
+  DeviceContext -
+
+  MiniportPair -
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    ASSERT(Unknown);
+    ASSERT(MiniportPair);
+
+    UNREFERENCED_PARAMETER(UnknownAdapter);
+    UNREFERENCED_PARAMETER(DeviceContext);
+
+    CMicArrayMiniportTopology* obj =
+        new (PoolFlags, MINTOPORT_POOLTAG)
+        CMicArrayMiniportTopology(UnknownOuter,
+            MiniportPair->TopoDescriptor,
+            MiniportPair->DeviceMaxChannels,
+            MiniportPair->DeviceType);
+    if (NULL == obj)
+    {
+        return STATUS_INSUFFICIENT_RESOURCES;
+    }
+
+    obj->AddRef();
+
+    *Unknown = reinterpret_cast<IUnknown*>(obj);
+
+    return STATUS_SUCCESS;
+} // CreateMicArrayMiniportTopology
+
+//=============================================================================
+CMicArrayMiniportTopology::~CMicArrayMiniportTopology
+(
+    void
+)
+/*++
+
+Routine Description:
+
+  Topology miniport destructor
+
+Arguments:
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    DPF_ENTER(("[CMicArrayMiniportTopology::~CMicArrayMiniportTopology]"));
+} // ~CMicArrayMiniportTopology
+
+//=============================================================================
+NTSTATUS
+CMicArrayMiniportTopology::DataRangeIntersection
+(
+    _In_        ULONG                   PinId,
+    _In_        PKSDATARANGE            ClientDataRange,
+    _In_        PKSDATARANGE            MyDataRange,
+    _In_        ULONG                   OutputBufferLength,
+    _Out_writes_bytes_to_opt_(OutputBufferLength, *ResultantFormatLength)
+    PVOID                   ResultantFormat     OPTIONAL,
+    _Out_       PULONG                  ResultantFormatLength
+)
+/*++
+
+Routine Description:
+
+  The DataRangeIntersection function determines the highest quality
+  intersection of two data ranges.
+
+Arguments:
+
+  PinId - Pin for which data intersection is being determined.
+
+  ClientDataRange - Pointer to KSDATARANGE structure which contains the data range
+                    submitted by client in the data range intersection property
+                    request.
+
+  MyDataRange - Pin's data range to be compared with client's data range.
+
+  OutputBufferLength - Size of the buffer pointed to by the resultant format
+                       parameter.
+
+  ResultantFormat - Pointer to value where the resultant format should be
+                    returned.
+
+  ResultantFormatLength - Actual length of the resultant format that is placed
+                          at ResultantFormat. This should be less than or equal
+                          to OutputBufferLength.
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    return
+        CMiniportTopologySimpleAudioSample::DataRangeIntersection
+        (
+            PinId,
+            ClientDataRange,
+            MyDataRange,
+            OutputBufferLength,
+            ResultantFormat,
+            ResultantFormatLength
+        );
+} // DataRangeIntersection
+
+//=============================================================================
+STDMETHODIMP
+CMicArrayMiniportTopology::GetDescription
+(
+    _Out_ PPCFILTER_DESCRIPTOR* OutFilterDescriptor
+)
+/*++
+
+Routine Description:
+
+  The GetDescription function gets a pointer to a filter description.
+  It provides a location to deposit a pointer in miniport's description
+  structure. This is the placeholder for the FromNode or ToNode fields in
+  connections which describe connections to the filter's pins.
+
+Arguments:
+
+  OutFilterDescriptor - Pointer to the filter description.
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    ASSERT(OutFilterDescriptor);
+
+    return CMiniportTopologySimpleAudioSample::GetDescription(OutFilterDescriptor);
+} // GetDescription
+
+//=============================================================================
+STDMETHODIMP
+CMicArrayMiniportTopology::Init
+(
+    _In_ PUNKNOWN                 UnknownAdapter,
+    _In_ PRESOURCELIST            ResourceList,
+    _In_ PPORTTOPOLOGY            Port_
+)
+/*++
+
+Routine Description:
+
+  The Init function initializes the miniport. Callers of this function
+  should run at IRQL PASSIVE_LEVEL
+
+Arguments:
+
+  UnknownAdapter - A pointer to the IUnknown interface of the adapter object.
+
+  ResourceList - Pointer to the resource list to be supplied to the miniport
+                 during initialization. The port driver is free to examine the
+                 contents of the ResourceList. The port driver will not be
+                 modify the ResourceList contents.
+
+  Port - Pointer to the topology port object that is linked with this miniport.
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    UNREFERENCED_PARAMETER(ResourceList);
+
+    PAGED_CODE();
+
+    ASSERT(UnknownAdapter);
+    ASSERT(Port_);
+
+    DPF_ENTER(("[CMicArrayMiniportTopology::Init]"));
+
+    NTSTATUS                    ntStatus;
+
+    ntStatus =
+        CMiniportTopologySimpleAudioSample::Init
+        (
+            UnknownAdapter,
+            Port_
+        );
+
+    return ntStatus;
+} // Init
+
+//=============================================================================
+STDMETHODIMP
+CMicArrayMiniportTopology::NonDelegatingQueryInterface
+(
+    _In_         REFIID                  Interface,
+    _COM_Outptr_ PVOID* Object
+)
+/*++
+
+Routine Description:
+
+  QueryInterface for MiniportTopology
+
+Arguments:
+
+  Interface - GUID of the interface
+
+  Object - interface object to be returned.
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    ASSERT(Object);
+
+    if (IsEqualGUIDAligned(Interface, IID_IUnknown))
+    {
+        *Object = PVOID(PUNKNOWN(this));
+    }
+    else if (IsEqualGUIDAligned(Interface, IID_IMiniport))
+    {
+        *Object = PVOID(PMINIPORT(this));
+    }
+    else if (IsEqualGUIDAligned(Interface, IID_IMiniportTopology))
+    {
+        *Object = PVOID(PMINIPORTTOPOLOGY(this));
+    }
+    else
+    {
+        *Object = NULL;
+    }
+
+    if (*Object)
+    {
+        // We reference the interface for the caller.
+        PUNKNOWN(*Object)->AddRef();
+        return(STATUS_SUCCESS);
+    }
+
+    return(STATUS_INVALID_PARAMETER);
+} // NonDelegatingQueryInterface
+
+//=============================================================================
+NTSTATUS
+CMicArrayMiniportTopology::PropertyHandlerMicArrayGeometry
+(
+    _In_ PPCPROPERTY_REQUEST      PropertyRequest
+)
+/*++
+
+Routine Description:
+
+  Handles ( KSPROPSETID_Audio, KSPROPERTY_AUDIO_MIC_ARRAY_GEOMETRY )
+
+Arguments:
+
+  PropertyRequest -
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    ASSERT(PropertyRequest);
+
+    DPF_ENTER(("[PropertyHandlerMicArrayGeometry]"));
+
+    NTSTATUS    ntStatus = STATUS_INVALID_DEVICE_REQUEST;
+    ULONG       nPinId = (ULONG)-1;
+
+    if (PropertyRequest->InstanceSize >= sizeof(ULONG))
+    {
+        nPinId = *(PULONG(PropertyRequest->Instance));
+
+        if (nPinId == KSPIN_TOPO_MIC_ELEMENTS)
+        {
+            if (PropertyRequest->Verb & KSPROPERTY_TYPE_BASICSUPPORT)
+            {
+                ntStatus =
+                    PropertyHandler_BasicSupport
+                    (
+                        PropertyRequest,
+                        KSPROPERTY_TYPE_BASICSUPPORT | KSPROPERTY_TYPE_GET,
+                        VT_ILLEGAL
+                    );
+            }
+            else
+            {
+                ULONG cElements = 2;
+                ULONG cbNeeded = FIELD_OFFSET(KSAUDIO_MIC_ARRAY_GEOMETRY, KsMicCoord) +
+                    cElements * sizeof(KSAUDIO_MICROPHONE_COORDINATES);
+
+                if (PropertyRequest->ValueSize == 0)
+                {
+                    PropertyRequest->ValueSize = cbNeeded;
+                    ntStatus = STATUS_BUFFER_OVERFLOW;
+                }
+                else if (PropertyRequest->ValueSize < cbNeeded)
+                {
+                    ntStatus = STATUS_BUFFER_TOO_SMALL;
+                }
+                else
+                {
+                    if (PropertyRequest->Verb & KSPROPERTY_TYPE_GET)
+                    {
+                        PKSAUDIO_MIC_ARRAY_GEOMETRY pMAG = (PKSAUDIO_MIC_ARRAY_GEOMETRY)PropertyRequest->Value;
+                        const SHORT MicArray_180_Degrees = 31416; // 10000 * pi
+                        const SHORT MicArray_45_Degrees = 7854;  // 10000 * pi / 4
+
+                        // fill in mic array geometry fields
+                        pMAG->usVersion = 0x0100;           // Version of Mic array specification (0x0100)
+                        pMAG->usMicArrayType = (USHORT)KSMICARRAY_MICARRAYTYPE_LINEAR;        // Type of Mic Array
+                        pMAG->wVerticalAngleBegin = -MicArray_45_Degrees; // Work Volume Vertical Angle Begin
+                        pMAG->wVerticalAngleEnd = MicArray_45_Degrees; // Work Volume Vertical Angle End
+                        pMAG->wHorizontalAngleBegin = 0;    // Work Volume HorizontalAngle Begin
+                        pMAG->wHorizontalAngleEnd = 0;    // Work Volume HorizontalAngle End
+                        pMAG->usFrequencyBandLo = 100;      // Low end of Freq Range
+                        pMAG->usFrequencyBandHi = 8000;     // High end of Freq Range
+
+                        pMAG->usNumberOfMicrophones = 2;    // Count of microphone coordinate structures to follow.
+
+                        pMAG->KsMicCoord[0].usType = (USHORT)KSMICARRAY_MICTYPE_CARDIOID;
+                        pMAG->KsMicCoord[0].wXCoord = 0;
+                        pMAG->KsMicCoord[0].wYCoord = 100;
+                        pMAG->KsMicCoord[0].wZCoord = 0;
+                        pMAG->KsMicCoord[0].wVerticalAngle = 0;
+                        pMAG->KsMicCoord[0].wHorizontalAngle = 0;
+
+                        pMAG->KsMicCoord[1].usType = (USHORT)KSMICARRAY_MICTYPE_CARDIOID;
+                        pMAG->KsMicCoord[1].wXCoord = 0;
+                        pMAG->KsMicCoord[1].wYCoord = -100;
+                        pMAG->KsMicCoord[1].wZCoord = 0;
+                        pMAG->KsMicCoord[1].wVerticalAngle = 0;
+                        pMAG->KsMicCoord[1].wHorizontalAngle = 0;
+                        ntStatus = STATUS_SUCCESS;
+                    }
+                }
+            }
+        }
+    }
+
+    return ntStatus;
+}
+
+//=============================================================================
+NTSTATUS
+CMicArrayMiniportTopology::PropertyHandlerMicProperties
+(
+    _In_ PPCPROPERTY_REQUEST      PropertyRequest
+)
+/*++
+
+Routine Description:
+
+Handles ( KSPROPSETID_Audio, KSPROPERTY_AUDIO_MIC_SNR )
+Handles ( KSPROPSETID_Audio, KSPROPERTY_AUDIO_MIC_SENSITIVITY2 )
+
+Arguments:
+
+PropertyRequest -
+
+Return Value:
+
+NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    ASSERT(PropertyRequest);
+
+    DPF_ENTER(("[PropertyHandlerMicProperties]"));
+
+    NTSTATUS    ntStatus = STATUS_INVALID_DEVICE_REQUEST;
+    ULONG       nPinId = (ULONG)-1;
+    KFLOATING_SAVE saveData;
+    NTSTATUS fstatus;
+
+    if (PropertyRequest->InstanceSize >= sizeof(ULONG))
+    {
+        nPinId = *(PULONG(PropertyRequest->Instance));
+
+        if (nPinId == KSPIN_TOPO_MIC_ELEMENTS)
+        {
+            if (PropertyRequest->Verb & KSPROPERTY_TYPE_BASICSUPPORT)
+            {
+                ntStatus =
+                    PropertyHandler_BasicSupport
+                    (
+                        PropertyRequest,
+                        KSPROPERTY_TYPE_BASICSUPPORT | KSPROPERTY_TYPE_GET,
+                        VT_ILLEGAL
+                    );
+            }
+            else
+            {
+                ntStatus =
+                    ValidatePropertyParams
+                    (
+                        PropertyRequest,
+                        sizeof(LONG),
+                        0
+                    );
+
+                if (NT_SUCCESS(ntStatus))
+                {
+                    if (PropertyRequest->Verb & KSPROPERTY_TYPE_GET)
+                    {
+                        if (PropertyRequest->PropertyItem->Id == KSPROPERTY_AUDIO_MIC_SNR)
+                        {
+                            LONG* micSNR = (LONG*)PropertyRequest->Value;
+                            fstatus = KeSaveFloatingPointState(&saveData);
+                            if (NT_SUCCESS(fstatus))
+                            {
+                                // Return microphone SNR information.
+                                *micSNR = FloatToFixedPoint16_16(MICARRAY_SNR); // convert float dB to fixed point arithmetic
+                                KeRestoreFloatingPointState(&saveData);
+                            }
+                            ntStatus = STATUS_SUCCESS;
+                        }
+                        else if (PropertyRequest->PropertyItem->Id == KSPROPERTY_AUDIO_MIC_SENSITIVITY2)
+                        {
+                            LONG* micSensitivity2 = (LONG*)PropertyRequest->Value;
+                            fstatus = KeSaveFloatingPointState(&saveData);
+                            if (NT_SUCCESS(fstatus))
+                            {
+                                // Return microphone SNR information.
+                                *micSensitivity2 = FloatToFixedPoint16_16(MICARRAY_SENSITIVITY2); // convert float dB to fixed point arithmetic
+                                KeRestoreFloatingPointState(&saveData);
+                            }
+                            ntStatus = STATUS_SUCCESS;
+                        }
+                    }
+                    else
+                    {
+                        ntStatus = STATUS_INVALID_DEVICE_REQUEST;
+                    }
+                }
+            }
+        }
+    }
+
+    return ntStatus;
+}
+
+//=============================================================================
+NTSTATUS
+CMicArrayMiniportTopology::PropertyHandlerJackDescription
+(
+    _In_ PPCPROPERTY_REQUEST      PropertyRequest
+)
+/*++
+
+Routine Description:
+
+  Handles ( KSPROPSETID_Jack, KSPROPERTY_JACK_DESCRIPTION )
+
+Arguments:
+
+  PropertyRequest -
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    ASSERT(PropertyRequest);
+
+    DPF_ENTER(("[PropertyHandlerJackDescription]"));
+
+    NTSTATUS ntStatus = STATUS_INVALID_DEVICE_REQUEST;
+    ULONG    nPinId = (ULONG)-1;
+
+    if (PropertyRequest->InstanceSize >= sizeof(ULONG))
+    {
+        nPinId = *(PULONG(PropertyRequest->Instance));
+
+        if (nPinId == KSPIN_TOPO_MIC_ELEMENTS)
+        {
+            if (PropertyRequest->Verb & KSPROPERTY_TYPE_BASICSUPPORT)
+            {
+                ntStatus =
+                    PropertyHandler_BasicSupport
+                    (
+                        PropertyRequest,
+                        KSPROPERTY_TYPE_BASICSUPPORT | KSPROPERTY_TYPE_GET,
+                        VT_ILLEGAL
+                    );
+            }
+            else
+            {
+                ULONG cbNeeded = sizeof(KSMULTIPLE_ITEM) + sizeof(KSJACK_DESCRIPTION);
+
+                if (PropertyRequest->ValueSize == 0)
+                {
+                    PropertyRequest->ValueSize = cbNeeded;
+                    ntStatus = STATUS_BUFFER_OVERFLOW;
+                }
+                else if (PropertyRequest->ValueSize < cbNeeded)
+                {
+                    ntStatus = STATUS_BUFFER_TOO_SMALL;
+                }
+                else
+                {
+                    if (PropertyRequest->Verb & KSPROPERTY_TYPE_GET)
+                    {
+                        PKSMULTIPLE_ITEM pMI = (PKSMULTIPLE_ITEM)PropertyRequest->Value;
+                        PKSJACK_DESCRIPTION pDesc = (PKSJACK_DESCRIPTION)(pMI + 1);
+
+                        pMI->Size = cbNeeded;
+                        pMI->Count = 1;
+
+                        pDesc->ChannelMapping = 0;                // Don't specify channel mask for array mic
+                        pDesc->Color = 0x00000000;       // Black.  This is an integrated device
+                        pDesc->ConnectionType = eConnTypeUnknown; // Integrated.
+                        pDesc->GenLocation = eGenLocPrimaryBox;
+                        pDesc->GeoLocation = eGeoLocFront;
+                        pDesc->PortConnection = ePortConnIntegratedDevice;
+                        pDesc->IsConnected = TRUE;             // This is an integrated device, so it's always "connected"
+
+                        ntStatus = STATUS_SUCCESS;
+                    }
+                }
+            }
+        }
+    }
+
+    return ntStatus;
+}
+
+//=============================================================================
+NTSTATUS
+CMicArrayMiniportTopology::PropertyHandlerJackDescription2
+(
+    _In_ PPCPROPERTY_REQUEST      PropertyRequest
+)
+/*++
+
+Routine Description:
+
+  Handles ( KSPROPSETID_Jack, KSPROPERTY_JACK_DESCRIPTION2 )
+
+Arguments:
+
+  PropertyRequest -
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    ASSERT(PropertyRequest);
+
+    DPF_ENTER(("[PropertyHandlerJackDescription2]"));
+
+    NTSTATUS ntStatus = STATUS_INVALID_DEVICE_REQUEST;
+    ULONG    nPinId = (ULONG)-1;
+
+    if (PropertyRequest->InstanceSize >= sizeof(ULONG))
+    {
+        nPinId = *(PULONG(PropertyRequest->Instance));
+
+        if (nPinId == KSPIN_TOPO_MIC_ELEMENTS)
+        {
+            if (PropertyRequest->Verb & KSPROPERTY_TYPE_BASICSUPPORT)
+            {
+                ntStatus =
+                    PropertyHandler_BasicSupport
+                    (
+                        PropertyRequest,
+                        KSPROPERTY_TYPE_BASICSUPPORT | KSPROPERTY_TYPE_GET,
+                        VT_ILLEGAL
+                    );
+            }
+            else
+            {
+                ULONG cbNeeded = sizeof(KSMULTIPLE_ITEM) + sizeof(KSJACK_DESCRIPTION2);
+
+                if (PropertyRequest->ValueSize == 0)
+                {
+                    PropertyRequest->ValueSize = cbNeeded;
+                    ntStatus = STATUS_BUFFER_OVERFLOW;
+                }
+                else if (PropertyRequest->ValueSize < cbNeeded)
+                {
+                    ntStatus = STATUS_BUFFER_TOO_SMALL;
+                }
+                else
+                {
+                    if (PropertyRequest->Verb & KSPROPERTY_TYPE_GET)
+                    {
+                        PKSMULTIPLE_ITEM pMI = (PKSMULTIPLE_ITEM)PropertyRequest->Value;
+                        PKSJACK_DESCRIPTION2 pDesc = (PKSJACK_DESCRIPTION2)(pMI + 1);
+
+                        pMI->Size = cbNeeded;
+                        pMI->Count = 1;
+
+                        RtlZeroMemory(pDesc, sizeof(KSJACK_DESCRIPTION2));
+
+                        //
+                        // Specifies the lower 16 bits of the DWORD parameter. This parameter indicates whether 
+                        // the jack is currently active, streaming, idle, or hardware not ready.
+                        //
+                        pDesc->DeviceStateInfo = 0;
+
+                        //
+                        // From MSDN:
+                        // "If an audio device lacks jack presence detection, the IsConnected member of
+                        // the KSJACK_DESCRIPTION structure must always be set to TRUE. To remove the 
+                        // ambiguity that results from this dual meaning of the TRUE value for IsConnected, 
+                        // a client application can call IKsJackDescription2::GetJackDescription2 to read 
+                        // the JackCapabilities flag of the KSJACK_DESCRIPTION2 structure. If this flag has
+                        // the JACKDESC2_PRESENCE_DETECT_CAPABILITY bit set, it indicates that the endpoint 
+                        // does in fact support jack presence detection. In that case, the return value of 
+                        // the IsConnected member can be interpreted to accurately reflect the insertion status
+                        // of the jack."
+                        //
+                        // Bit definitions:
+                        // 0x00000001 - JACKDESC2_PRESENCE_DETECT_CAPABILITY
+                        // 0x00000002 - JACKDESC2_DYNAMIC_FORMAT_CHANGE_CAPABILITY 
+                        //
+                        pDesc->JackCapabilities = 0;
+
+                        ntStatus = STATUS_SUCCESS;
+                    }
+                }
+            }
+        }
+    }
+
+    return ntStatus;
+}
+
+//=============================================================================
+NTSTATUS
+PropertyHandler_MicArrayTopoFilter
+(
+    _In_ PPCPROPERTY_REQUEST      PropertyRequest
+)
+/*++
+
+Routine Description:
+
+  Redirects property request to miniport object
+
+Arguments:
+
+  PropertyRequest -
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    ASSERT(PropertyRequest);
+
+    DPF_ENTER(("[PropertyHandler_MicArrayTopoFilter]"));
+
+    // PropertryRequest structure is filled by portcls. 
+    // MajorTarget is a pointer to miniport object for miniports.
+    //
+    NTSTATUS            ntStatus = STATUS_INVALID_DEVICE_REQUEST;
+    PCMicArrayMiniportTopology  pMiniport = (PCMicArrayMiniportTopology)PropertyRequest->MajorTarget;
+
+    if (IsEqualGUIDAligned(*PropertyRequest->PropertyItem->Set, KSPROPSETID_Audio))
+    {
+        if (PropertyRequest->PropertyItem->Id == KSPROPERTY_AUDIO_MIC_ARRAY_GEOMETRY)
+        {
+            ntStatus = pMiniport->PropertyHandlerMicArrayGeometry(PropertyRequest);
+        }
+        else if (PropertyRequest->PropertyItem->Id == KSPROPERTY_AUDIO_MIC_SENSITIVITY2)
+        {
+            ntStatus = pMiniport->PropertyHandlerMicProperties(PropertyRequest);
+        }
+        else if (PropertyRequest->PropertyItem->Id == KSPROPERTY_AUDIO_MIC_SNR)
+        {
+            ntStatus = pMiniport->PropertyHandlerMicProperties(PropertyRequest);
+        }
+    }
+    else if (IsEqualGUIDAligned(*PropertyRequest->PropertyItem->Set, KSPROPSETID_Jack))
+    {
+        if (PropertyRequest->PropertyItem->Id == KSPROPERTY_JACK_DESCRIPTION)
+        {
+            ntStatus = pMiniport->PropertyHandlerJackDescription(PropertyRequest);
+        }
+        else if (PropertyRequest->PropertyItem->Id == KSPROPERTY_JACK_DESCRIPTION2)
+        {
+            ntStatus = pMiniport->PropertyHandlerJackDescription2(PropertyRequest);
+        }
+    }
+
+    return ntStatus;
+} // PropertyHandler_TopoFilter
+
+//=============================================================================
+NTSTATUS
+PropertyHandler_MicArrayTopology
+(
+    _In_ PPCPROPERTY_REQUEST      PropertyRequest
+)
+/*++
+
+Routine Description:
+
+  Redirects property request to miniport object
+
+Arguments:
+
+  PropertyRequest -
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    ASSERT(PropertyRequest);
+
+    DPF_ENTER(("[PropertyHandler_MicArrayTopology]"));
+
+    // PropertryRequest structure is filled by portcls. 
+    // MajorTarget is a pointer to miniport object for miniports.
+    //
+    PCMicArrayMiniportTopology pMiniport = (PCMicArrayMiniportTopology)PropertyRequest->MajorTarget;
+
+    return pMiniport->PropertyHandlerGeneric(PropertyRequest);
+} // PropertyHandler_MicArrayTopology
+
+#pragma code_seg()
diff --git a/audio/simpleaudiosample/Source/Filters/micarraytopo.h b/audio/simpleaudiosample/Source/Filters/micarraytopo.h
new file mode 100644
index 00000000..4f4a621f
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Filters/micarraytopo.h
@@ -0,0 +1,97 @@
+
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    micarraytopo.h
+
+Abstract:
+
+    Declaration of mic array topology miniport.
+
+--*/
+
+#ifndef _SIMPLEAUDIOSAMPLE_MICARRAYTOPO_H_
+#define _SIMPLEAUDIOSAMPLE_MICARRAYTOPO_H_
+
+#include "basetopo.h"
+
+//=============================================================================
+// Classes
+//=============================================================================
+
+///////////////////////////////////////////////////////////////////////////////
+// CMicArrayMiniportTopology 
+//   
+
+#pragma code_seg()
+class CMicArrayMiniportTopology :
+    public CMiniportTopologySimpleAudioSample,
+    public IMiniportTopology,
+    public CUnknown
+{
+public:
+    DECLARE_STD_UNKNOWN();
+    CMicArrayMiniportTopology
+    (
+        _In_opt_    PUNKNOWN                UnknownOuter,
+        _In_        PCFILTER_DESCRIPTOR* FilterDesc,
+        _In_        USHORT                  DeviceMaxChannels,
+        _In_        eDeviceType             DeviceType
+    )
+        : CUnknown(UnknownOuter),
+        CMiniportTopologySimpleAudioSample(FilterDesc, DeviceMaxChannels),
+        m_DeviceType(DeviceType)
+    {
+        ASSERT(m_DeviceType == eMicArrayDevice1);
+    }
+
+    ~CMicArrayMiniportTopology();
+
+    IMP_IMiniportTopology;
+
+    NTSTATUS            PropertyHandlerMicArrayGeometry
+    (
+        _In_ PPCPROPERTY_REQUEST  PropertyRequest
+    );
+
+    NTSTATUS            PropertyHandlerMicProperties
+    (
+        _In_ PPCPROPERTY_REQUEST  PropertyRequest
+    );
+
+    NTSTATUS            PropertyHandlerJackDescription
+    (
+        _In_ PPCPROPERTY_REQUEST  PropertyRequest
+    );
+
+    NTSTATUS            PropertyHandlerJackDescription2
+    (
+        _In_ PPCPROPERTY_REQUEST  PropertyRequest
+    );
+
+protected:
+    eDeviceType     m_DeviceType;
+
+};
+
+typedef CMicArrayMiniportTopology* PCMicArrayMiniportTopology;
+
+
+NTSTATUS
+CreateMicArrayMiniportTopology(
+    _Out_           PUNKNOWN* Unknown,
+    _In_            REFCLSID,
+    _In_opt_        PUNKNOWN                                UnknownOuter,
+    _In_            POOL_FLAGS                              PoolFlags,
+    _In_            PUNKNOWN                                UnknownAdapter,
+    _In_opt_        PVOID                                   DeviceContext,
+    _In_            PENDPOINT_MINIPAIR                      MiniportPair
+);
+
+NTSTATUS PropertyHandler_MicArrayTopoFilter(_In_ PPCPROPERTY_REQUEST PropertyRequest);
+NTSTATUS PropertyHandler_MicArrayTopology(_In_ PPCPROPERTY_REQUEST PropertyRequest);
+
+#endif // _SIMPLEAUDIOSAMPLE_MICARRAYTOPO_H_
diff --git a/audio/simpleaudiosample/Source/Filters/micarraywavtable.h b/audio/simpleaudiosample/Source/Filters/micarraywavtable.h
new file mode 100644
index 00000000..53656038
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Filters/micarraywavtable.h
@@ -0,0 +1,292 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    micarraywavtable.h
+
+Abstract:-
+
+    Declaration of wave miniport tables for the mic array.
+
+--*/
+
+#ifndef _SIMPLEAUDIOSAMPLE_MICARRAYWAVTABLE_H_
+#define _SIMPLEAUDIOSAMPLE_MICARRAYWAVTABLE_H_
+
+//
+// Mic array range.
+//
+#define MICARRAY_RAW_CHANNELS                   2       // Channels for raw mode
+#define MICARRAY_DEVICE_MAX_CHANNELS            2       // Max channels overall
+#define MICARRAY_32_BITS_PER_SAMPLE_PCM         32      // 32 Bits Per Sample
+#define MICARRAY_RAW_SAMPLE_RATE                48000   // Raw sample rate
+
+//
+// Max # of pin instances.
+//
+#define MICARRAY_MAX_INPUT_STREAMS              1
+
+//=============================================================================
+static
+KSDATAFORMAT_WAVEFORMATEXTENSIBLE MicArrayPinSupportedDeviceFormats[] =
+{
+    // 48 KHz 32-bit 2 channels
+    {
+        {
+            sizeof(KSDATAFORMAT_WAVEFORMATEXTENSIBLE),
+            0,
+            0,
+            0,
+            STATICGUIDOF(KSDATAFORMAT_TYPE_AUDIO),
+            STATICGUIDOF(KSDATAFORMAT_SUBTYPE_PCM),
+            STATICGUIDOF(KSDATAFORMAT_SPECIFIER_WAVEFORMATEX)
+        },
+        {
+            {
+                WAVE_FORMAT_EXTENSIBLE,
+                2,
+                48000,
+                384000,
+                8,
+                32,
+                sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX)
+            },
+            32,
+            KSAUDIO_SPEAKER_STEREO,
+            STATICGUIDOF(KSDATAFORMAT_SUBTYPE_PCM)
+        }
+    }
+};
+
+//
+// Supported modes (only on streaming pins).
+//
+static
+MODE_AND_DEFAULT_FORMAT MicArrayPinSupportedDeviceModes[] =
+{
+    {
+        STATIC_AUDIO_SIGNALPROCESSINGMODE_RAW,
+        &MicArrayPinSupportedDeviceFormats[0].DataFormat
+    }
+};
+
+//
+// The entries here must follow the same order as the filter's pin
+// descriptor array.
+//
+static
+PIN_DEVICE_FORMATS_AND_MODES MicArrayPinDeviceFormatsAndModes[] =
+{
+    {
+        BridgePin,
+        NULL,
+        0,
+        NULL,
+        0
+    },
+    {
+        SystemCapturePin,
+        MicArrayPinSupportedDeviceFormats,
+        SIZEOF_ARRAY(MicArrayPinSupportedDeviceFormats),
+        MicArrayPinSupportedDeviceModes,
+        SIZEOF_ARRAY(MicArrayPinSupportedDeviceModes)
+    }
+};
+
+//=============================================================================
+// Data ranges
+//
+// See CMiniportWaveRT::DataRangeIntersection.
+//
+static
+KSDATARANGE_AUDIO MicArrayPinDataRangesRawStream[] =
+{
+    {
+        {
+            sizeof(KSDATARANGE_AUDIO),
+            KSDATARANGE_ATTRIBUTES,         // An attributes list follows this data range
+            0,
+            0,
+            STATICGUIDOF(KSDATAFORMAT_TYPE_AUDIO),
+            STATICGUIDOF(KSDATAFORMAT_SUBTYPE_PCM),
+            STATICGUIDOF(KSDATAFORMAT_SPECIFIER_WAVEFORMATEX)
+        },
+        MICARRAY_RAW_CHANNELS,
+        MICARRAY_32_BITS_PER_SAMPLE_PCM,
+        MICARRAY_32_BITS_PER_SAMPLE_PCM,
+        MICARRAY_RAW_SAMPLE_RATE,
+        MICARRAY_RAW_SAMPLE_RATE
+    },
+};
+
+static
+PKSDATARANGE MicArrayPinDataRangePointersStream[] =
+{
+    // All supported device formats should be listed in the DataRange.
+    PKSDATARANGE(&MicArrayPinDataRangesRawStream[0]),
+    PKSDATARANGE(&PinDataRangeAttributeList),
+};
+
+//=============================================================================
+static
+KSDATARANGE MicArrayPinDataRangesBridge[] =
+{
+    {
+        sizeof(KSDATARANGE),
+        0,
+        0,
+        0,
+        STATICGUIDOF(KSDATAFORMAT_TYPE_AUDIO),
+        STATICGUIDOF(KSDATAFORMAT_SUBTYPE_ANALOG),
+        STATICGUIDOF(KSDATAFORMAT_SPECIFIER_NONE)
+    }
+};
+
+static
+PKSDATARANGE MicArrayPinDataRangePointersBridge[] =
+{
+    &MicArrayPinDataRangesBridge[0]
+};
+
+//=============================================================================
+static
+PCPIN_DESCRIPTOR MicArrayWaveMiniportPins[] =
+{
+    // Wave In Bridge Pin (Capture - From Topology) KSPIN_WAVE_BRIDGE
+    {
+        0,
+        0,
+        0,
+        NULL,
+        {
+            0,
+            NULL,
+            0,
+            NULL,
+            SIZEOF_ARRAY(MicArrayPinDataRangePointersBridge),
+            MicArrayPinDataRangePointersBridge,
+            KSPIN_DATAFLOW_IN,
+            KSPIN_COMMUNICATION_NONE,
+            &KSCATEGORY_AUDIO,
+            NULL,
+            0
+        }
+    },
+    // Wave In Streaming Pin (Capture) KSPIN_WAVE_HOST
+    {
+        MICARRAY_MAX_INPUT_STREAMS,
+        MICARRAY_MAX_INPUT_STREAMS,
+        0,
+        NULL,
+        {
+            0,
+            NULL,
+            0,
+            NULL,
+            SIZEOF_ARRAY(MicArrayPinDataRangePointersStream),
+            MicArrayPinDataRangePointersStream,
+            KSPIN_DATAFLOW_OUT,
+            KSPIN_COMMUNICATION_SINK,
+            &KSCATEGORY_AUDIO,
+            &KSAUDFNAME_RECORDING_CONTROL,
+            0
+        }
+    }
+};
+
+//=============================================================================
+static
+PCNODE_DESCRIPTOR MicArrayWaveMiniportNodes[] =
+{
+    // KSNODE_WAVE_ADC
+    {
+        0,                      // Flags
+        NULL,                   // AutomationTable
+        &KSNODETYPE_ADC,        // Type
+        NULL                    // Name
+    }
+};
+
+//=============================================================================
+static
+PCCONNECTION_DESCRIPTOR MicArrayWaveMiniportConnections[] =
+{
+    { PCFILTER_NODE,        KSPIN_WAVE_BRIDGE,      KSNODE_WAVE_ADC,     1 },
+    { KSNODE_WAVE_ADC,      0,                      PCFILTER_NODE,       KSPIN_WAVEIN_HOST },
+};
+
+//=============================================================================
+
+static
+SIMPLEAUDIOSAMPLE_PROPERTY_ITEM PropertiesMicArrayWaveFilter[] =
+{
+    {
+        {
+            &KSPROPSETID_General,
+            KSPROPERTY_GENERAL_COMPONENTID,
+            KSPROPERTY_TYPE_GET | KSPROPERTY_TYPE_BASICSUPPORT,
+            PropertyHandler_WaveFilter,
+        },
+        0,
+        0,
+        NULL,
+        NULL,
+        NULL,
+        NULL,
+        0
+    },
+    {
+        {
+            &KSPROPSETID_Pin,
+            KSPROPERTY_PIN_PROPOSEDATAFORMAT,
+            KSPROPERTY_TYPE_SET | KSPROPERTY_TYPE_BASICSUPPORT,
+            PropertyHandler_WaveFilter,
+        },
+        0,
+        0,
+        NULL,
+        NULL,
+        NULL,
+        NULL,
+        0
+    },
+    {
+        {
+            &KSPROPSETID_Pin,
+            KSPROPERTY_PIN_PROPOSEDATAFORMAT2,
+            KSPROPERTY_TYPE_GET | KSPROPERTY_TYPE_BASICSUPPORT,
+            PropertyHandler_WaveFilter,
+        },
+        0,
+        0,
+        NULL,
+        NULL,
+        NULL,
+        NULL,
+        0
+    },
+};
+
+DEFINE_PCAUTOMATION_TABLE_PROP(AutomationMicArrayWaveFilter, PropertiesMicArrayWaveFilter);
+
+//=============================================================================
+static
+PCFILTER_DESCRIPTOR MicArrayWaveMiniportFilterDescriptor =
+{
+    0,                                              // Version
+    &AutomationMicArrayWaveFilter,                  // AutomationTable
+    sizeof(PCPIN_DESCRIPTOR),                       // PinSize
+    SIZEOF_ARRAY(MicArrayWaveMiniportPins),         // PinCount
+    MicArrayWaveMiniportPins,                       // Pins
+    sizeof(PCNODE_DESCRIPTOR),                      // NodeSize
+    SIZEOF_ARRAY(MicArrayWaveMiniportNodes),        // NodeCount
+    MicArrayWaveMiniportNodes,                      // Nodes
+    SIZEOF_ARRAY(MicArrayWaveMiniportConnections),  // ConnectionCount
+    MicArrayWaveMiniportConnections,                // Connections
+    0,                                              // CategoryCount
+    NULL                                            // Categories  - use defaults (audio, render, capture)
+};
+
+#endif // _SIMPLEAUDIOSAMPLE_MICARRAYWAVTABLE_H_
diff --git a/audio/simpleaudiosample/Source/Filters/minipairs.h b/audio/simpleaudiosample/Source/Filters/minipairs.h
new file mode 100644
index 00000000..b7d8950f
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Filters/minipairs.h
@@ -0,0 +1,177 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    minipairs.h
+
+Abstract:
+
+    Local audio endpoint filter definitions. 
+--*/
+
+#ifndef _SIMPLEAUDIOSAMPLE_MINIPAIRS_H_
+#define _SIMPLEAUDIOSAMPLE_MINIPAIRS_H_
+
+#include "speakertopo.h"
+#include "speakertoptable.h"
+#include "speakerwavtable.h"
+
+#include "micarraytopo.h"
+#include "micarray1toptable.h"
+#include "micarraywavtable.h"
+
+
+NTSTATUS
+CreateMiniportWaveRTSimpleAudioSample
+( 
+    _Out_       PUNKNOWN *,
+    _In_        REFCLSID,
+    _In_opt_    PUNKNOWN,
+    _In_        POOL_FLAGS,
+    _In_        PUNKNOWN,
+    _In_opt_    PVOID,
+    _In_        PENDPOINT_MINIPAIR
+);
+
+NTSTATUS
+CreateMiniportTopologySimpleAudioSample
+( 
+    _Out_       PUNKNOWN *,
+    _In_        REFCLSID,
+    _In_opt_    PUNKNOWN,
+    _In_        POOL_FLAGS,
+    _In_        PUNKNOWN,
+    _In_opt_    PVOID,
+    _In_        PENDPOINT_MINIPAIR
+);
+
+//
+// Render miniports.
+//
+
+/*********************************************************************
+* Topology/Wave bridge connection for speaker (internal)             *
+*                                                                    *
+*              +------+                +------+                      *
+*              | Wave |                | Topo |                      *
+*              |      |                |      |                      *
+* System   --->|0    1|--------------->|0    1|---> Line Out         *
+*              |      |                |      |                      *
+*              +------+                +------+                      *
+*********************************************************************/
+static
+PHYSICALCONNECTIONTABLE SpeakerTopologyPhysicalConnections[] =
+{
+    {
+        KSPIN_TOPO_WAVEOUT_SOURCE,  // TopologyIn
+        KSPIN_WAVE_RENDER3_SOURCE,   // WaveOut
+        CONNECTIONTYPE_WAVE_OUTPUT
+    }
+};
+
+static
+ENDPOINT_MINIPAIR SpeakerMiniports =
+{
+    eSpeakerDevice,
+    L"TopologySpeaker",                                     // make sure this or the template name matches with KSNAME_TopologySpeaker in the inf's [Strings] section 
+    NULL,                                                   // optional template name
+    CreateMiniportTopologySimpleAudioSample,
+    &SpeakerTopoMiniportFilterDescriptor,
+    0, NULL,                                                // Interface properties
+    L"WaveSpeaker",                                         // make sure this or the template name matches with KSNAME_WaveSpeaker in the inf's [Strings] section
+    NULL,                                                   // optional template name
+    CreateMiniportWaveRTSimpleAudioSample,
+    &SpeakerWaveMiniportFilterDescriptor,
+    0,                                                      // Interface properties
+    NULL,
+    SPEAKER_DEVICE_MAX_CHANNELS,
+    SpeakerPinDeviceFormatsAndModes,
+    SIZEOF_ARRAY(SpeakerPinDeviceFormatsAndModes),
+    SpeakerTopologyPhysicalConnections,
+    SIZEOF_ARRAY(SpeakerTopologyPhysicalConnections),
+    ENDPOINT_NO_FLAGS,
+};
+
+//
+// Capture miniports.
+//
+
+/*********************************************************************
+* Topology/Wave bridge connection for mic array  1 (front)           *
+*                                                                    *
+*              +------+    +------+                                  *
+*              | Topo |    | Wave |                                  *
+*              |      |    |      |                                  *
+*  Mic in  --->|0    1|===>|0    1|---> Capture Host Pin             *
+*              |      |    |      |                                  *
+*              +------+    +------+                                  *
+*********************************************************************/
+static
+PHYSICALCONNECTIONTABLE MicArray1TopologyPhysicalConnections[] =
+{
+    {
+        KSPIN_TOPO_BRIDGE,          // TopologyOut
+        KSPIN_WAVE_BRIDGE,          // WaveIn
+        CONNECTIONTYPE_TOPOLOGY_OUTPUT
+    }
+};
+
+static
+ENDPOINT_MINIPAIR MicArray1Miniports =
+{
+    eMicArrayDevice1,
+    L"TopologyMicArray1",                   // make sure this or the template name matches with KSNAME_TopologyMicArray1 in the inf's [Strings] section 
+    NULL,                                   // optional template name
+    CreateMicArrayMiniportTopology,
+    &MicArray1TopoMiniportFilterDescriptor,
+    0, NULL,                                // Interface properties
+    L"WaveMicArray1",                       // make sure this or the tempalte name matches with KSNAME_WaveMicArray1 in the inf's [Strings] section
+    NULL,                                   // optional template name
+    CreateMiniportWaveRTSimpleAudioSample,
+    &MicArrayWaveMiniportFilterDescriptor,
+    0,                                      // Interface properties
+    NULL,
+    MICARRAY_DEVICE_MAX_CHANNELS,
+    MicArrayPinDeviceFormatsAndModes,
+    SIZEOF_ARRAY(MicArrayPinDeviceFormatsAndModes),
+    MicArray1TopologyPhysicalConnections,
+    SIZEOF_ARRAY(MicArray1TopologyPhysicalConnections),
+    ENDPOINT_NO_FLAGS,
+};
+
+
+//=============================================================================
+//
+// Render miniport pairs. NOTE: the split of render and capture is arbitrary and
+// unnessary, this array could contain capture endpoints.
+//
+static
+PENDPOINT_MINIPAIR  g_RenderEndpoints[] = 
+{
+    &SpeakerMiniports,
+};
+
+#define g_cRenderEndpoints  (SIZEOF_ARRAY(g_RenderEndpoints))
+
+//=============================================================================
+//
+// Capture miniport pairs. NOTE: the split of render and capture is arbitrary and
+// unnessary, this array could contain render endpoints.
+//
+static
+PENDPOINT_MINIPAIR  g_CaptureEndpoints[] =
+{
+    &MicArray1Miniports,
+};
+
+#define g_cCaptureEndpoints (SIZEOF_ARRAY(g_CaptureEndpoints))
+
+//=============================================================================
+//
+// Total miniports = # endpoints * 2 (topology + wave).
+//
+#define g_MaxMiniports  ((g_cRenderEndpoints + g_cCaptureEndpoints) * 2)
+
+#endif // _SIMPLEAUDIOSAMPLE_MINIPAIRS_H_
diff --git a/audio/simpleaudiosample/Source/Filters/speakertopo.cpp b/audio/simpleaudiosample/Source/Filters/speakertopo.cpp
new file mode 100644
index 00000000..d1635efa
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Filters/speakertopo.cpp
@@ -0,0 +1,118 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    speakertopo.cpp
+
+Abstract:
+
+    Implementation of topology miniport for the speaker (internal).
+--*/
+
+#pragma warning (disable : 4127)
+
+#include "definitions.h"
+#include "endpoints.h"
+#include "mintopo.h"
+#include "speakertopo.h"
+#include "speakertoptable.h"
+
+
+#pragma code_seg("PAGE")
+//=============================================================================
+NTSTATUS
+PropertyHandler_SpeakerTopoFilter
+( 
+    _In_ PPCPROPERTY_REQUEST      PropertyRequest 
+)
+/*++
+
+Routine Description:
+
+  Redirects property request to miniport object
+
+Arguments:
+
+  PropertyRequest - 
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    ASSERT(PropertyRequest);
+
+    DPF_ENTER(("[PropertyHandler_SpeakerTopoFilter]"));
+
+    // PropertryRequest structure is filled by portcls. 
+    // MajorTarget is a pointer to miniport object for miniports.
+    //
+    NTSTATUS            ntStatus = STATUS_INVALID_DEVICE_REQUEST;
+    PCMiniportTopology  pMiniport = (PCMiniportTopology)PropertyRequest->MajorTarget;
+
+    if (IsEqualGUIDAligned(*PropertyRequest->PropertyItem->Set, KSPROPSETID_Jack))
+    {
+        if (PropertyRequest->PropertyItem->Id == KSPROPERTY_JACK_DESCRIPTION)
+        {
+            ntStatus = pMiniport->PropertyHandlerJackDescription(
+                PropertyRequest,
+                ARRAYSIZE(SpeakerJackDescriptions),
+                SpeakerJackDescriptions
+                );
+        }
+        else if (PropertyRequest->PropertyItem->Id == KSPROPERTY_JACK_DESCRIPTION2)
+        {
+            ntStatus = pMiniport->PropertyHandlerJackDescription2(
+                PropertyRequest,
+                ARRAYSIZE(SpeakerJackDescriptions),
+                SpeakerJackDescriptions,
+                0 // jack capabilities
+                );
+        }
+    }
+
+    return ntStatus;
+} // PropertyHandler_SpeakerTopoFilter
+
+//=============================================================================
+NTSTATUS
+PropertyHandler_SpeakerTopology
+(
+    _In_ PPCPROPERTY_REQUEST      PropertyRequest
+)
+/*++
+
+Routine Description:
+
+  Redirects property request to miniport object
+
+Arguments:
+
+  PropertyRequest -
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    ASSERT(PropertyRequest);
+
+    DPF_ENTER(("[PropertyHandler_SpeakerTopology]"));
+
+    // PropertryRequest structure is filled by portcls. 
+    // MajorTarget is a pointer to miniport object for miniports.
+    //
+    PCMiniportTopology pMiniport = (PCMiniportTopology)PropertyRequest->MajorTarget;
+
+    return pMiniport->PropertyHandlerGeneric(PropertyRequest);
+} // PropertyHandler_SpeakerTopology
+
+#pragma code_seg()
diff --git a/audio/simpleaudiosample/Source/Filters/speakertopo.h b/audio/simpleaudiosample/Source/Filters/speakertopo.h
new file mode 100644
index 00000000..0eff1ebb
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Filters/speakertopo.h
@@ -0,0 +1,22 @@
+
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    speakertopo.h
+
+Abstract:
+
+    Declaration of topology miniport for the speaker (internal).
+--*/
+
+#ifndef _SIMPLEAUDIOSAMPLE_SPEAKERTOPO_H_
+#define _SIMPLEAUDIOSAMPLE_SPEAKERTOPO_H_
+
+NTSTATUS PropertyHandler_SpeakerTopoFilter(_In_ PPCPROPERTY_REQUEST PropertyRequest);
+
+NTSTATUS PropertyHandler_SpeakerTopology(_In_ PPCPROPERTY_REQUEST PropertyRequest);
+
+#endif // _SIMPLEAUDIOSAMPLE_SPEAKERTOPO_H_
diff --git a/audio/simpleaudiosample/Source/Filters/speakertoptable.h b/audio/simpleaudiosample/Source/Filters/speakertoptable.h
new file mode 100644
index 00000000..1b046d96
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Filters/speakertoptable.h
@@ -0,0 +1,206 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    speakertoptable.h
+
+Abstract:
+
+    Declaration of topology tables.
+--*/
+
+#ifndef _SIMPLEAUDIOSAMPLE_SPEAKERTOPTABLE_H_
+#define _SIMPLEAUDIOSAMPLE_SPEAKERTOPTABLE_H_
+
+//=============================================================================
+static
+KSDATARANGE SpeakerTopoPinDataRangesBridge[] =
+{
+ {
+   sizeof(KSDATARANGE),
+   0,
+   0,
+   0,
+   STATICGUIDOF(KSDATAFORMAT_TYPE_AUDIO),
+   STATICGUIDOF(KSDATAFORMAT_SUBTYPE_ANALOG),
+   STATICGUIDOF(KSDATAFORMAT_SPECIFIER_NONE)
+ }
+};
+
+//=============================================================================
+static
+PKSDATARANGE SpeakerTopoPinDataRangePointersBridge[] =
+{
+  &SpeakerTopoPinDataRangesBridge[0]
+};
+
+//=============================================================================
+static
+PCPIN_DESCRIPTOR SpeakerTopoMiniportPins[] =
+{
+  // KSPIN_TOPO_WAVEOUT_SOURCE
+  {
+    0,
+    0,
+    0,                                                  // InstanceCount
+    NULL,                                               // AutomationTable
+    {                                                   // KsPinDescriptor
+      0,                                                // InterfacesCount
+      NULL,                                             // Interfaces
+      0,                                                // MediumsCount
+      NULL,                                             // Mediums
+      SIZEOF_ARRAY(SpeakerTopoPinDataRangePointersBridge),// DataRangesCount
+      SpeakerTopoPinDataRangePointersBridge,            // DataRanges
+      KSPIN_DATAFLOW_IN,                                // DataFlow
+      KSPIN_COMMUNICATION_NONE,                         // Communication
+      &KSCATEGORY_AUDIO,                                // Category
+      NULL,                                             // Name
+      0                                                 // Reserved
+    }
+  },
+  // KSPIN_TOPO_LINEOUT_DEST
+  {
+    0,
+    0,
+    0,                                                  // InstanceCount
+    NULL,                                               // AutomationTable
+    {                                                   // KsPinDescriptor
+      0,                                                // InterfacesCount
+      NULL,                                             // Interfaces
+      0,                                                // MediumsCount
+      NULL,                                             // Mediums
+      SIZEOF_ARRAY(SpeakerTopoPinDataRangePointersBridge),// DataRangesCount
+      SpeakerTopoPinDataRangePointersBridge,            // DataRanges
+      KSPIN_DATAFLOW_OUT,                               // DataFlow
+      KSPIN_COMMUNICATION_NONE,                         // Communication
+      &KSNODETYPE_SPEAKER,                              // Category
+      NULL,                                             // Name
+      0                                                 // Reserved
+    }
+  }
+};
+
+//=============================================================================
+static
+KSJACK_DESCRIPTION SpeakerJackDescBridge =
+{
+    KSAUDIO_SPEAKER_STEREO,
+    0xB3C98C,               // Color spec for green
+    eConnTypeUnknown,
+    eGeoLocFront,
+    eGenLocPrimaryBox,
+    ePortConnIntegratedDevice,
+    TRUE
+};
+
+// Only return a KSJACK_DESCRIPTION for the physical bridge pin.
+static 
+PKSJACK_DESCRIPTION SpeakerJackDescriptions[] =
+{
+    NULL,
+    &SpeakerJackDescBridge
+};
+
+//=============================================================================
+static
+PCPROPERTY_ITEM SpeakerPropertiesVolume[] =
+{
+    {
+    &KSPROPSETID_Audio,
+    KSPROPERTY_AUDIO_VOLUMELEVEL,
+    KSPROPERTY_TYPE_GET | KSPROPERTY_TYPE_SET | KSPROPERTY_TYPE_BASICSUPPORT,
+    PropertyHandler_SpeakerTopology
+    }
+};
+
+DEFINE_PCAUTOMATION_TABLE_PROP(AutomationSpeakerVolume, SpeakerPropertiesVolume);
+
+//=============================================================================
+static
+PCPROPERTY_ITEM SpeakerPropertiesMute[] =
+{
+  {
+    &KSPROPSETID_Audio,
+    KSPROPERTY_AUDIO_MUTE,
+    KSPROPERTY_TYPE_GET | KSPROPERTY_TYPE_SET | KSPROPERTY_TYPE_BASICSUPPORT,
+    PropertyHandler_SpeakerTopology
+  }
+};
+
+DEFINE_PCAUTOMATION_TABLE_PROP(AutomationSpeakerMute, SpeakerPropertiesMute);
+
+//=============================================================================
+static
+PCNODE_DESCRIPTOR SpeakerTopologyNodes[] =
+{
+    // KSNODE_TOPO_VOLUME
+    {
+      0,                              // Flags
+      &AutomationSpeakerVolume,     // AutomationTable
+      &KSNODETYPE_VOLUME,             // Type
+      &KSAUDFNAME_MASTER_VOLUME         // Name
+    },
+    // KSNODE_TOPO_MUTE
+    {
+      0,                              // Flags
+      &AutomationSpeakerMute,       // AutomationTable
+      &KSNODETYPE_MUTE,               // Type
+      &KSAUDFNAME_MASTER_MUTE            // Name
+    }
+};
+
+C_ASSERT(KSNODE_TOPO_VOLUME == 0);
+C_ASSERT(KSNODE_TOPO_MUTE == 1);
+
+static
+PCCONNECTION_DESCRIPTOR SpeakerTopoMiniportConnections[] =
+{
+    //  FromNode,                 FromPin,                    ToNode,                 ToPin
+    {   PCFILTER_NODE,            KSPIN_TOPO_WAVEOUT_SOURCE,    KSNODE_TOPO_VOLUME,     1 },
+    {   KSNODE_TOPO_VOLUME,       0,                          KSNODE_TOPO_MUTE,       1 },
+    {   KSNODE_TOPO_MUTE,         0,                          PCFILTER_NODE,          KSPIN_TOPO_LINEOUT_DEST }
+};
+
+//=============================================================================
+static
+PCPROPERTY_ITEM PropertiesSpeakerTopoFilter[] =
+{
+    {
+        &KSPROPSETID_Jack,
+        KSPROPERTY_JACK_DESCRIPTION,
+        KSPROPERTY_TYPE_GET |
+        KSPROPERTY_TYPE_BASICSUPPORT,
+        PropertyHandler_SpeakerTopoFilter
+    },
+    {
+        &KSPROPSETID_Jack,
+        KSPROPERTY_JACK_DESCRIPTION2,
+        KSPROPERTY_TYPE_GET |
+        KSPROPERTY_TYPE_BASICSUPPORT,
+        PropertyHandler_SpeakerTopoFilter
+    }
+};
+
+DEFINE_PCAUTOMATION_TABLE_PROP(AutomationSpeakerTopoFilter, PropertiesSpeakerTopoFilter);
+
+//=============================================================================
+static
+PCFILTER_DESCRIPTOR SpeakerTopoMiniportFilterDescriptor =
+{
+  0,                                            // Version
+  &AutomationSpeakerTopoFilter,                 // AutomationTable
+  sizeof(PCPIN_DESCRIPTOR),                     // PinSize
+  SIZEOF_ARRAY(SpeakerTopoMiniportPins),        // PinCount
+  SpeakerTopoMiniportPins,                      // Pins
+  sizeof(PCNODE_DESCRIPTOR),                    // NodeSize
+  SIZEOF_ARRAY(SpeakerTopologyNodes),           // NodeCount
+  SpeakerTopologyNodes,                         // Nodes
+  SIZEOF_ARRAY(SpeakerTopoMiniportConnections), // ConnectionCount
+  SpeakerTopoMiniportConnections,               // Connections
+  0,                                            // CategoryCount
+  NULL                                          // Categories
+};
+
+#endif // _SIMPLEAUDIOSAMPLE_SPEAKERTOPTABLE_H_
diff --git a/audio/simpleaudiosample/Source/Filters/speakerwavtable.h b/audio/simpleaudiosample/Source/Filters/speakerwavtable.h
new file mode 100644
index 00000000..e67a673c
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Filters/speakerwavtable.h
@@ -0,0 +1,246 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    speakerwavtable.h
+
+Abstract:
+
+    Declaration of wave miniport tables for the render endpoints.
+--*/
+
+#ifndef _SIMPLEAUDIOSAMPLE_SPEAKERWAVTABLE_H_
+#define _SIMPLEAUDIOSAMPLE_SPEAKERWAVTABLE_H_
+
+// To keep the code simple assume device supports only 48KHz, 16-bit, stereo (PCM and NON-PCM)
+
+#define SPEAKER_DEVICE_MAX_CHANNELS                 2       // Max Channels.
+
+#define SPEAKER_HOST_MAX_CHANNELS                   2       // Max Channels.
+#define SPEAKER_HOST_MIN_BITS_PER_SAMPLE            16      // Min Bits Per Sample
+#define SPEAKER_HOST_MAX_BITS_PER_SAMPLE            16      // Max Bits Per Sample
+#define SPEAKER_HOST_MIN_SAMPLE_RATE                48000   // Min Sample Rate
+#define SPEAKER_HOST_MAX_SAMPLE_RATE                48000   // Max Sample Rate
+
+//
+// Max # of pin instances.
+//
+#define SPEAKER_MAX_INPUT_SYSTEM_STREAMS            1
+
+//=============================================================================
+
+static 
+KSDATAFORMAT_WAVEFORMATEXTENSIBLE SpeakerHostPinSupportedDeviceFormats[] =
+{
+    { // 0
+        {
+            sizeof(KSDATAFORMAT_WAVEFORMATEXTENSIBLE),
+            0,
+            0,
+            0,
+            STATICGUIDOF(KSDATAFORMAT_TYPE_AUDIO),
+            STATICGUIDOF(KSDATAFORMAT_SUBTYPE_PCM),
+            STATICGUIDOF(KSDATAFORMAT_SPECIFIER_WAVEFORMATEX)
+        },
+        {
+            {
+                WAVE_FORMAT_EXTENSIBLE,
+                2,
+                48000,
+                192000,
+                4,
+                16,
+                sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX)
+            },
+            16,
+            KSAUDIO_SPEAKER_STEREO,
+            STATICGUIDOF(KSDATAFORMAT_SUBTYPE_PCM)
+        }
+    }
+};
+
+//
+// Supported modes (only on streaming pins).
+//
+static
+MODE_AND_DEFAULT_FORMAT SpeakerHostPinSupportedDeviceModes[] =
+{
+    {
+        STATIC_AUDIO_SIGNALPROCESSINGMODE_DEFAULT,
+        &SpeakerHostPinSupportedDeviceFormats[0].DataFormat  // 48KHz
+    }
+};
+
+//
+// The entries here must follow the same order as the filter's pin
+// descriptor array.
+//
+static 
+PIN_DEVICE_FORMATS_AND_MODES SpeakerPinDeviceFormatsAndModes[] = 
+{
+    {
+        SystemRenderPin,
+        SpeakerHostPinSupportedDeviceFormats,
+        SIZEOF_ARRAY(SpeakerHostPinSupportedDeviceFormats),
+        SpeakerHostPinSupportedDeviceModes,
+        SIZEOF_ARRAY(SpeakerHostPinSupportedDeviceModes)
+    },
+    {
+        BridgePin,
+        NULL,
+        0,
+        NULL,
+        0
+    }
+};
+
+//=============================================================================
+static
+KSDATARANGE_AUDIO SpeakerPinDataRangesStream[] =
+{
+    { // 0
+        {
+            sizeof(KSDATARANGE_AUDIO),
+            KSDATARANGE_ATTRIBUTES,         // An attributes list follows this data range
+            0,
+            0,
+            STATICGUIDOF(KSDATAFORMAT_TYPE_AUDIO),
+            STATICGUIDOF(KSDATAFORMAT_SUBTYPE_PCM),
+            STATICGUIDOF(KSDATAFORMAT_SPECIFIER_WAVEFORMATEX)
+        },
+        SPEAKER_HOST_MAX_CHANNELS,           
+        SPEAKER_HOST_MIN_BITS_PER_SAMPLE,    
+        SPEAKER_HOST_MAX_BITS_PER_SAMPLE,    
+        SPEAKER_HOST_MIN_SAMPLE_RATE,            
+        SPEAKER_HOST_MAX_SAMPLE_RATE             
+    }
+};
+
+static
+PKSDATARANGE SpeakerPinDataRangePointersStream[] =
+{
+    PKSDATARANGE(&SpeakerPinDataRangesStream[0]),
+    PKSDATARANGE(&PinDataRangeAttributeList),
+};
+
+//=============================================================================
+static
+KSDATARANGE SpeakerPinDataRangesBridge[] =
+{
+    {
+        sizeof(KSDATARANGE),
+        0,
+        0,
+        0,
+        STATICGUIDOF(KSDATAFORMAT_TYPE_AUDIO),
+        STATICGUIDOF(KSDATAFORMAT_SUBTYPE_ANALOG),
+        STATICGUIDOF(KSDATAFORMAT_SPECIFIER_NONE)
+    }
+};
+
+static
+PKSDATARANGE SpeakerPinDataRangePointersBridge[] =
+{
+    &SpeakerPinDataRangesBridge[0]
+};
+
+//=============================================================================
+static
+PCPIN_DESCRIPTOR SpeakerWaveMiniportPins[] =
+{
+    // Wave Out Streaming Pin (Renderer) KSPIN_WAVE_RENDER3_SINK_SYSTEM
+    {
+        SPEAKER_MAX_INPUT_SYSTEM_STREAMS,
+        SPEAKER_MAX_INPUT_SYSTEM_STREAMS, 
+        0,
+        NULL,        // AutomationTable
+        {
+            0,
+            NULL,
+            0,
+            NULL,
+            SIZEOF_ARRAY(SpeakerPinDataRangePointersStream),
+            SpeakerPinDataRangePointersStream,
+            KSPIN_DATAFLOW_IN,
+            KSPIN_COMMUNICATION_SINK,
+            &KSCATEGORY_AUDIO,
+            NULL,
+            0
+        }
+    },
+    // Wave Out Bridge Pin (Renderer) KSPIN_WAVE_RENDER3_SOURCE
+    {
+        0,
+        0,
+        0,
+        NULL,
+        {
+            0,
+            NULL,
+            0,
+            NULL,
+            SIZEOF_ARRAY(SpeakerPinDataRangePointersBridge),
+            SpeakerPinDataRangePointersBridge,
+            KSPIN_DATAFLOW_OUT,
+            KSPIN_COMMUNICATION_NONE,
+            &KSCATEGORY_AUDIO,
+            NULL,
+            0
+        }
+    },
+};
+
+//=============================================================================
+//
+//                   ----------------------------      
+//                   |                          |      
+//  Host Pin     0-->|                          |--> 1 KSPIN_WAVE_RENDER3_SOURCE
+//                   |                          |      
+//                   ----------------------------
+static
+PCCONNECTION_DESCRIPTOR SpeakerWaveMiniportConnections[] =
+{
+    { PCFILTER_NODE,            KSPIN_WAVE_RENDER3_SINK_SYSTEM,     PCFILTER_NODE,   KSPIN_WAVE_RENDER3_SOURCE }
+};
+
+//=============================================================================
+static
+PCPROPERTY_ITEM PropertiesSpeakerWaveFilter[] =
+{
+    {
+        &KSPROPSETID_Pin,
+        KSPROPERTY_PIN_PROPOSEDATAFORMAT,
+        KSPROPERTY_TYPE_SET | KSPROPERTY_TYPE_BASICSUPPORT,
+        PropertyHandler_WaveFilter
+    },
+    {
+        &KSPROPSETID_Pin,
+        KSPROPERTY_PIN_PROPOSEDATAFORMAT2,
+        KSPROPERTY_TYPE_GET | KSPROPERTY_TYPE_BASICSUPPORT,
+        PropertyHandler_WaveFilter
+    }
+};
+
+DEFINE_PCAUTOMATION_TABLE_PROP(AutomationSpeakerWaveFilter, PropertiesSpeakerWaveFilter);
+
+//=============================================================================
+static
+PCFILTER_DESCRIPTOR SpeakerWaveMiniportFilterDescriptor =
+{
+    0,                                              // Version
+    &AutomationSpeakerWaveFilter,                   // AutomationTable
+    sizeof(PCPIN_DESCRIPTOR),                       // PinSize
+    SIZEOF_ARRAY(SpeakerWaveMiniportPins),          // PinCount
+    SpeakerWaveMiniportPins,                        // Pins
+    sizeof(PCNODE_DESCRIPTOR),                      // NodeSize
+    0,                                              // NodeCount
+    NULL,                                           // Nodes
+    SIZEOF_ARRAY(SpeakerWaveMiniportConnections),   // ConnectionCount
+    SpeakerWaveMiniportConnections,                 // Connections
+    0,                                              // CategoryCount
+    NULL                                            // Categories  - use defaults (audio, render, capture)
+};
+
+#endif // _SIMPLEAUDIOSAMPLE_SPEAKERWAVTABLE_H_
diff --git a/audio/simpleaudiosample/Source/Inc/Inc.vcxproj b/audio/simpleaudiosample/Source/Inc/Inc.vcxproj
new file mode 100644
index 00000000..a83375e6
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Inc/Inc.vcxproj
@@ -0,0 +1,242 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|ARM64">
+      <Configuration>Debug</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|ARM64">
+      <Configuration>Release</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{4B664BA5-057A-41B8-B365-2C99065C4DFA}</ProjectGuid>
+    <RootNamespace>$(MSBuildProjectName)</RootNamespace>
+    <KMDF_VERSION_MAJOR>1</KMDF_VERSION_MAJOR>
+    <Configuration Condition="'$(Configuration)' == ''">Debug</Configuration>
+    <Platform Condition="'$(Platform)' == ''">Win32</Platform>
+    <SampleGuid>{F51739CE-5253-42B5-9191-57F28B5842C6}</SampleGuid>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Label="Configuration" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>False</UseDebugLibraries>
+    <DriverTargetPlatform>Universal</DriverTargetPlatform>
+    <DriverType>KMDF</DriverType>
+    <PlatformToolset>WindowsKernelModeDriver10.0</PlatformToolset>
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'" Label="Configuration">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>False</UseDebugLibraries>
+    <DriverTargetPlatform>Universal</DriverTargetPlatform>
+    <DriverType>KMDF</DriverType>
+    <PlatformToolset>WindowsKernelModeDriver10.0</PlatformToolset>
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+  </PropertyGroup>
+  <PropertyGroup Label="Configuration" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>True</UseDebugLibraries>
+    <DriverTargetPlatform>Universal</DriverTargetPlatform>
+    <DriverType>KMDF</DriverType>
+    <PlatformToolset>WindowsKernelModeDriver10.0</PlatformToolset>
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'" Label="Configuration">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>True</UseDebugLibraries>
+    <DriverTargetPlatform>Universal</DriverTargetPlatform>
+    <DriverType>KMDF</DriverType>
+    <PlatformToolset>WindowsKernelModeDriver10.0</PlatformToolset>
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+  </PropertyGroup>
+  <PropertyGroup Label="Configuration" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>False</UseDebugLibraries>
+    <DriverTargetPlatform>Universal</DriverTargetPlatform>
+    <DriverType>KMDF</DriverType>
+    <PlatformToolset>WindowsKernelModeDriver10.0</PlatformToolset>
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+  </PropertyGroup>
+  <PropertyGroup Label="Configuration" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>True</UseDebugLibraries>
+    <DriverTargetPlatform>Universal</DriverTargetPlatform>
+    <DriverType>KMDF</DriverType>
+    <PlatformToolset>WindowsKernelModeDriver10.0</PlatformToolset>
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <PropertyGroup>
+    <OutDir>$(IntDir)</OutDir>
+  </PropertyGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
+  </ImportGroup>
+  <ItemGroup Label="WrappedTaskItems" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <TargetName>Inc</TargetName>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'">
+    <TargetName>Inc</TargetName>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <TargetName>Inc</TargetName>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">
+    <TargetName>Inc</TargetName>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <TargetName>Inc</TargetName>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <TargetName>Inc</TargetName>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </ResourceCompile>
+    <ClCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..;.</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_NEW_DELETE_OPERATORS_</PreprocessorDefinitions>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <DisableSpecificWarnings>4595;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+    </ClCompile>
+    <Midl>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </Midl>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'">
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </ResourceCompile>
+    <ClCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..;.</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_NEW_DELETE_OPERATORS_</PreprocessorDefinitions>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <DisableSpecificWarnings>4595;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+    </ClCompile>
+    <Midl>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </Midl>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </ResourceCompile>
+    <ClCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..;.</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_NEW_DELETE_OPERATORS_</PreprocessorDefinitions>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <DisableSpecificWarnings>4595;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+    </ClCompile>
+    <Midl>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </Midl>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </ResourceCompile>
+    <ClCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..;.</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_NEW_DELETE_OPERATORS_</PreprocessorDefinitions>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <DisableSpecificWarnings>4595;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+    </ClCompile>
+    <Midl>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </Midl>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </ResourceCompile>
+    <ClCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..;.</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_NEW_DELETE_OPERATORS_</PreprocessorDefinitions>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <DisableSpecificWarnings>4595;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+    </ClCompile>
+    <Midl>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </Midl>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </ResourceCompile>
+    <ClCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..;.</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_NEW_DELETE_OPERATORS_</PreprocessorDefinitions>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <DisableSpecificWarnings>4595;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+    </ClCompile>
+    <Midl>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </Midl>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <Inf Exclude="@(Inf)" Include="*.inf" />
+    <FilesToPackage Include="$(TargetPath)" Condition="'$(ConfigurationType)'=='Driver' or '$(ConfigurationType)'=='DynamicLibrary'" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Exclude="@(None)" Include="*.txt;*.htm;*.html" />
+    <None Exclude="@(None)" Include="*.ico;*.cur;*.bmp;*.dlg;*.rct;*.gif;*.jpg;*.jpeg;*.wav;*.jpe;*.tiff;*.tif;*.png;*.rc2" />
+    <None Exclude="@(None)" Include="*.def;*.bat;*.hpj;*.asmx" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Exclude="@(ClInclude)" Include="*.h;*.hpp;*.hxx;*.hm;*.inl;*.xsd" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+</Project>
diff --git a/audio/simpleaudiosample/Source/Inc/Inc.vcxproj.Filters b/audio/simpleaudiosample/Source/Inc/Inc.vcxproj.Filters
new file mode 100644
index 00000000..353662af
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Inc/Inc.vcxproj.Filters
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Source Files">
+      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx;*</Extensions>
+      <UniqueIdentifier>{54BE0AAC-642F-4D50-80D1-CA3C4BB4BB4C}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="Header Files">
+      <Extensions>h;hpp;hxx;hm;inl;inc;xsd</Extensions>
+      <UniqueIdentifier>{6A00B9EC-DB03-4D51-B351-60DE9C0C51A1}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="Resource Files">
+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms;man;xml</Extensions>
+      <UniqueIdentifier>{887357BD-50C0-40E6-85E8-87E0F45862DB}</UniqueIdentifier>
+    </Filter>
+  </ItemGroup>
+ <ItemGroup>
+    <ClCompile Include="*.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="*.h;*.hpp;*.hxx;*.hm;*.inl;*.xsd">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+  </ItemGroup>
+</Project>
diff --git a/audio/simpleaudiosample/Source/Inc/NewDelete.h b/audio/simpleaudiosample/Source/Inc/NewDelete.h
new file mode 100644
index 00000000..ebeab037
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Inc/NewDelete.h
@@ -0,0 +1,104 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+NewDelete.h
+
+Abstract:
+
+Declaration of placement new and delete operators.
+--*/
+#pragma once
+
+#ifdef _NEW_DELETE_OPERATORS_
+
+/*****************************************************************************
+* Functions
+*/
+
+/*****************************************************************************
+* ::new()
+*****************************************************************************
+* New function for creating objects with a specified allocation tag and
+* pool type
+*/
+PVOID operator new
+(
+    size_t      iSize,
+    POOL_FLAGS  poolFlags,
+    ULONG       tag
+);
+
+
+/*****************************************************************************
+* ::new()
+*****************************************************************************
+* New function for creating objects with a specified pool type.
+*/
+PVOID operator new
+(
+    size_t      iSize,
+    POOL_FLAGS  poolFlags
+);
+
+
+/*****************************************************************************
+* ::delete()
+*****************************************************************************
+* Delete with tag function.
+*/
+void __cdecl operator delete
+(
+    PVOID pVoid,
+    ULONG tag
+);
+
+
+/*****************************************************************************
+* ::delete()
+*****************************************************************************
+* Sized Delete function.
+*/
+void __cdecl operator delete
+(
+    _Pre_maybenull_ __drv_freesMem(Mem) PVOID pVoid,
+    _In_ size_t cbSize
+);
+
+
+/*****************************************************************************
+* ::delete()
+*****************************************************************************
+* Basic Delete function.
+*/
+void __cdecl operator delete
+(
+    PVOID pVoid
+);
+
+
+/*****************************************************************************
+* ::delete()
+*****************************************************************************
+* Sized Array Delete function.
+*/
+void __cdecl operator delete[]
+(
+    _Pre_maybenull_ __drv_freesMem(Mem) PVOID pVoid,
+    _In_ size_t cbSize
+);
+
+
+/*****************************************************************************
+* ::delete()
+*****************************************************************************
+* Array Delete function.
+*/
+void __cdecl operator delete[]
+(
+    _Pre_maybenull_ __drv_freesMem(Mem) PVOID pVoid
+);
+
+#endif//_NEW_DELETE_OPERATORS_
diff --git a/audio/simpleaudiosample/Source/Inc/basetopo.h b/audio/simpleaudiosample/Source/Inc/basetopo.h
new file mode 100644
index 00000000..a893aa3e
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Inc/basetopo.h
@@ -0,0 +1,96 @@
+
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    basetopo.h
+
+Abstract:
+
+    Declaration of topology miniport.
+--*/
+
+#ifndef _SIMPLEAUDIOSAMPLE_BASETOPO_H_
+#define _SIMPLEAUDIOSAMPLE_BASETOPO_H_
+
+//=============================================================================
+// Classes
+//=============================================================================
+
+///////////////////////////////////////////////////////////////////////////////
+// CMiniportTopologySimpleAudioSample
+//
+
+class CMiniportTopologySimpleAudioSample
+{
+  protected:
+    PADAPTERCOMMON              m_AdapterCommon;        // Adapter common object.
+    PPCFILTER_DESCRIPTOR        m_FilterDescriptor;     // Filter descriptor.
+    PPORTEVENTS                 m_PortEvents;           // Event interface.
+    USHORT                      m_DeviceMaxChannels;    // Max device channels.
+
+  public:
+    CMiniportTopologySimpleAudioSample(
+        _In_        PCFILTER_DESCRIPTOR    *FilterDesc,
+        _In_        USHORT                  DeviceMaxChannels
+        );
+    
+    ~CMiniportTopologySimpleAudioSample();
+
+    NTSTATUS                    GetDescription
+    (   
+        _Out_ PPCFILTER_DESCRIPTOR *  Description
+    );
+
+    NTSTATUS                    DataRangeIntersection
+    (   
+        _In_  ULONG             PinId,
+        _In_  PKSDATARANGE      ClientDataRange,
+        _In_  PKSDATARANGE      MyDataRange,
+        _In_  ULONG             OutputBufferLength,
+        _Out_writes_bytes_to_opt_(OutputBufferLength, *ResultantFormatLength)
+              PVOID             ResultantFormat OPTIONAL,
+        _Out_ PULONG            ResultantFormatLength
+    );
+
+    NTSTATUS                    Init
+    ( 
+        _In_  PUNKNOWN          UnknownAdapter,
+        _In_  PPORTTOPOLOGY     Port_ 
+    );
+
+    // PropertyHandlers.
+    NTSTATUS                    PropertyHandlerGeneric
+    (
+        _In_  PPCPROPERTY_REQUEST PropertyRequest
+    );
+
+    NTSTATUS                    PropertyHandlerMuxSource
+    (
+        _In_  PPCPROPERTY_REQUEST PropertyRequest
+    );
+
+    NTSTATUS                    PropertyHandlerDevSpecific
+    (
+        _In_  PPCPROPERTY_REQUEST PropertyRequest
+    );
+
+    VOID                        AddEventToEventList
+    (
+        _In_  PKSEVENT_ENTRY    EventEntry 
+    );
+    
+    VOID                        GenerateEventList
+    (
+        _In_opt_    GUID       *Set,
+        _In_        ULONG       EventId,
+        _In_        BOOL        PinEvent,
+        _In_        ULONG       PinId,
+        _In_        BOOL        NodeEvent,
+        _In_        ULONG       NodeId
+    );
+};
+
+#endif
diff --git a/audio/simpleaudiosample/Source/Inc/common.h b/audio/simpleaudiosample/Source/Inc/common.h
new file mode 100644
index 00000000..2d2db7db
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Inc/common.h
@@ -0,0 +1,477 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    Common.h
+
+Abstract:
+    
+    CAdapterCommon class declaration.
+--*/
+
+#ifndef _SIMPLEAUDIOSAMPLE_COMMON_H_
+#define _SIMPLEAUDIOSAMPLE_COMMON_H_
+
+#define HNSTIME_PER_MILLISECOND 10000
+
+//=============================================================================
+// Macros
+//=============================================================================
+
+#define UNREFERENCED_VAR(status) \
+    status = status 
+
+//-------------------------------------------------------------------------
+// Description:
+//
+// jump to the given label.
+//
+// Parameters:
+//
+//      label - [in] label to jump if condition is met
+//
+#define JUMP(label)                                             \
+        goto label;  
+
+//-------------------------------------------------------------------------
+// Description:
+//
+// If the condition evaluates to TRUE, jump to the given label.
+//
+// Parameters:
+//
+//      condition - [in] Code that fits in if statement
+//      label - [in] label to jump if condition is met
+//
+#define IF_TRUE_JUMP(condition, label)                          \
+    if (condition)                                               \
+    {                                                           \
+        goto label;                                             \
+    }
+
+//-------------------------------------------------------------------------
+// Description:
+//
+// If the condition evaluates to TRUE, perform the given statement
+// then jump to the given label.
+//
+// Parameters:
+//
+//      condition - [in] Code that fits in if statement
+//      action - [in] action to perform in body of if statement
+//      label - [in] label to jump if condition is met
+//
+#define IF_TRUE_ACTION_JUMP(condition, action, label)           \
+    if (condition)                                               \
+    {                                                           \
+        action;                                                 \
+        goto label;                                             \
+    }
+    
+//-------------------------------------------------------------------------
+// Description:
+//
+// If the ntStatus is not NT_SUCCESS, perform the given statement then jump to
+// the given label.
+//
+// Parameters:
+//
+//      ntStatus - [in] Value to check
+//      action - [in] action to perform in body of if statement
+//      label - [in] label to jump if condition is met
+//
+#define IF_FAILED_ACTION_JUMP(ntStatus, action, label)          \
+        if (!NT_SUCCESS(ntStatus))                              \
+        {                                                       \
+            action;                                             \
+            goto label;                                         \
+        }
+    
+//-------------------------------------------------------------------------
+// Description:
+//
+// If the ntStatus passed is not NT_SUCCESS, jump to the given label.
+//
+// Parameters:
+//
+//      ntStatus - [in] Value to check
+//      label - [in] label to jump if condition is met
+//
+#define IF_FAILED_JUMP(ntStatus, label)                         \
+    if (!NT_SUCCESS(ntStatus))                                   \
+    {                                                           \
+        goto label;                                             \
+    }
+
+#define SAFE_RELEASE(p) {if (p) { (p)->Release(); (p) = nullptr; } }
+#define SAFE_DELETE_PTR_WITH_TAG(ptr, tag) if(ptr) { ExFreePoolWithTag((ptr), tag); (ptr) = NULL; }
+
+// JACKDESC_RGB(r, g, b) 
+#define JACKDESC_RGB(r, g, b) \
+    ((COLORREF)((r << 16) | (g << 8) | (b)))
+
+// Min/Max defines.
+#define MIN(x, y) ((x) < (y) ? (x) : (y))
+#define MAX(x, y) ((x) > (y) ? (x) : (y))
+
+#define MINWAVERT_POOLTAG           'RWNM'
+#define MINTOPORT_POOLTAG           'RTNM'
+#define MINADAPTER_POOLTAG          'uAyS'
+
+typedef enum
+{
+    eSpeakerDevice = 0,
+    eMicArrayDevice1,
+    eMaxDeviceType,
+} eDeviceType;
+
+//
+// Signal processing modes and default formats structs.
+//
+typedef struct _MODE_AND_DEFAULT_FORMAT {
+    GUID            Mode;
+    KSDATAFORMAT*   DefaultFormat;
+} MODE_AND_DEFAULT_FORMAT, *PMODE_AND_DEFAULT_FORMAT;
+
+//
+// Enumeration of the various types of pins implemented in this driver.
+//
+typedef enum
+{
+    NoPin,
+    BridgePin,
+    SystemRenderPin,
+    SystemCapturePin,
+} PINTYPE;
+
+//
+// PIN_DEVICE_FORMATS_AND_MODES
+//
+//  Used to specify a pin's type (e.g. system, offload, etc.), formats, and
+//  modes. Conceptually serves similar purpose as the PCPIN_DESCRIPTOR to
+//  define a pin, but is more specific to driver implementation.
+//
+//  Arrays of these structures follow the same order as the filter's
+//  pin descriptor array so that KS pin IDs can serve as an index.
+//
+typedef struct _PIN_DEVICE_FORMATS_AND_MODES
+{
+    PINTYPE                             PinType;
+
+    KSDATAFORMAT_WAVEFORMATEXTENSIBLE * WaveFormats;
+    ULONG                               WaveFormatsCount;
+    
+    MODE_AND_DEFAULT_FORMAT *           ModeAndDefaultFormat;
+    ULONG                               ModeAndDefaultFormatCount;
+
+} PIN_DEVICE_FORMATS_AND_MODES, *PPIN_DEVICE_FORMATS_AND_MODES;
+
+// forward declaration.
+typedef struct _ENDPOINT_MINIPAIR *PENDPOINT_MINIPAIR;
+
+// both wave & topology miniport create function prototypes have this form:
+typedef HRESULT (*PFNCREATEMINIPORT)(
+    _Out_           PUNKNOWN                              * Unknown,
+    _In_            REFCLSID,
+    _In_opt_        PUNKNOWN                                UnknownOuter,
+    _In_            POOL_FLAGS                              PoolFlags, 
+    _In_            PUNKNOWN                                UnknownAdapter,
+    _In_opt_        PVOID                                   DeviceContext,
+    _In_            PENDPOINT_MINIPAIR                      MiniportPair
+);
+
+//=============================================================================
+//
+//=============================================================================
+typedef struct _SIMPLEAUDIOSAMPLE_DEVPROPERTY {
+    const DEVPROPKEY   *PropertyKey;
+    DEVPROPTYPE Type;
+    ULONG BufferSize;
+    __field_bcount_opt(BufferSize) PVOID Buffer;
+} SIMPLEAUDIOSAMPLE_DEVPROPERTY, PSIMPLEAUDIOSAMPLE_DEVPROPERTY;
+
+#define ENDPOINT_NO_FLAGS                       0x00000000
+#define ENDPOINT_CELLULAR_PROVIDER1             0x00000008
+#define ENDPOINT_CELLULAR_PROVIDER2             0x00000010
+
+//
+// Endpoint miniport pair (wave/topology) descriptor.
+//
+typedef struct _ENDPOINT_MINIPAIR 
+{
+    eDeviceType                     DeviceType;
+
+    // Topology miniport.
+    PWSTR                           TopoName;               // make sure this or the template name matches with SIMPLEAUDIOSAMPLE.<TopoName>.szPname in the inf's [Strings] section
+    PWSTR                           TemplateTopoName;       // optional template name
+    PFNCREATEMINIPORT               TopoCreateCallback;
+    PCFILTER_DESCRIPTOR*            TopoDescriptor;
+    ULONG                           TopoInterfacePropertyCount;
+    const SIMPLEAUDIOSAMPLE_DEVPROPERTY*       TopoInterfaceProperties;
+
+    // Wave RT miniport.
+    PWSTR                           WaveName;               // make sure this or the template name matches with SIMPLEAUDIOSAMPLE.<WaveName>.szPname in the inf's [Strings] section
+    PWSTR                           TemplateWaveName;       // optional template name
+    PFNCREATEMINIPORT               WaveCreateCallback;
+    PCFILTER_DESCRIPTOR*            WaveDescriptor;
+    ULONG                           WaveInterfacePropertyCount;
+    const SIMPLEAUDIOSAMPLE_DEVPROPERTY*       WaveInterfaceProperties;
+
+    USHORT                          DeviceMaxChannels;
+    PIN_DEVICE_FORMATS_AND_MODES*   PinDeviceFormatsAndModes;
+    ULONG                           PinDeviceFormatsAndModesCount;
+
+    // Miniport physical connections.
+    PHYSICALCONNECTIONTABLE*        PhysicalConnections;
+    ULONG                           PhysicalConnectionCount;
+
+    // General endpoint flags (one of more ENDPOINT_<flag-type>, see above)
+    ULONG                           DeviceFlags;
+} ENDPOINT_MINIPAIR;
+
+//=============================================================================
+// Defines
+//=============================================================================
+
+DEFINE_GUID(IID_IAdapterCommon,
+0x7eda2950, 0xbf9f, 0x11d0, 0x87, 0x1f, 0x0, 0xa0, 0xc9, 0x11, 0xb5, 0x44);
+
+//=============================================================================
+// Interfaces
+//=============================================================================
+
+///////////////////////////////////////////////////////////////////////////////
+// IAdapterCommon
+//
+DECLARE_INTERFACE_(IAdapterCommon, IUnknown)
+{
+    STDMETHOD_(NTSTATUS,        Init) 
+    ( 
+        THIS_
+        _In_  PDEVICE_OBJECT      DeviceObject 
+    ) PURE;
+
+    STDMETHOD_(PDEVICE_OBJECT,  GetDeviceObject)
+    (
+        THIS
+    ) PURE;
+    
+    STDMETHOD_(PDEVICE_OBJECT,  GetPhysicalDeviceObject)
+    (
+        THIS
+    ) PURE;
+
+    STDMETHOD_(WDFDEVICE,       GetWdfDevice)
+    (
+        THIS
+    ) PURE;
+
+    STDMETHOD_(VOID,            SetWaveServiceGroup) 
+    ( 
+        THIS_
+        _In_ PSERVICEGROUP        ServiceGroup 
+    ) PURE;
+
+    STDMETHOD_(BOOL,            bDevSpecificRead)
+    (
+        THIS_
+    ) PURE;
+
+    STDMETHOD_(VOID,            bDevSpecificWrite)
+    (
+        THIS_
+        _In_  BOOL                bDevSpecific
+    );
+
+    STDMETHOD_(INT,             iDevSpecificRead)
+    (
+        THIS_
+    ) PURE;
+
+    STDMETHOD_(VOID,            iDevSpecificWrite)
+    (
+        THIS_
+        _In_  INT                 iDevSpecific
+    );
+
+    STDMETHOD_(UINT,            uiDevSpecificRead)
+    (
+        THIS_
+    ) PURE;
+
+    STDMETHOD_(VOID,            uiDevSpecificWrite)
+    (
+        THIS_
+        _In_  UINT                uiDevSpecific
+    );
+
+    STDMETHOD_(BOOL,            MixerMuteRead)
+    (
+        THIS_
+        _In_  ULONG               Index,
+        _In_  ULONG               Channel
+    ) PURE;
+
+    STDMETHOD_(VOID,            MixerMuteWrite)
+    (
+        THIS_
+        _In_  ULONG               Index,
+        _In_  ULONG               Channel,
+        _In_  BOOL                Value
+    );
+
+    STDMETHOD_(ULONG,           MixerMuxRead)
+    (
+        THIS
+    );
+
+    STDMETHOD_(VOID,            MixerMuxWrite)
+    (
+        THIS_
+        _In_  ULONG               Index
+    );
+
+    STDMETHOD_(LONG,            MixerVolumeRead) 
+    ( 
+        THIS_
+        _In_  ULONG               Index,
+        _In_  ULONG               Channel
+    ) PURE;
+
+    STDMETHOD_(VOID,            MixerVolumeWrite) 
+    ( 
+        THIS_
+        _In_  ULONG               Index,
+        _In_  ULONG               Channel,
+        _In_  LONG                Value 
+    ) PURE;
+    
+    STDMETHOD_(LONG,            MixerPeakMeterRead) 
+    ( 
+        THIS_
+        _In_  ULONG               Index,
+        _In_  ULONG               Channel
+    ) PURE;
+
+    STDMETHOD_(VOID,            MixerReset) 
+    ( 
+        THIS 
+    ) PURE;
+
+    STDMETHOD_(NTSTATUS,        WriteEtwEvent) 
+    ( 
+        THIS_ 
+        _In_ EPcMiniportEngineEvent    miniportEventType,
+        _In_ ULONGLONG  ullData1,
+        _In_ ULONGLONG  ullData2,
+        _In_ ULONGLONG  ullData3,
+        _In_ ULONGLONG  ullData4
+    ) PURE;
+
+    STDMETHOD_(VOID,            SetEtwHelper) 
+    ( 
+        THIS_
+        PPORTCLSETWHELPER _pPortClsEtwHelper
+    ) PURE;
+    
+    STDMETHOD_(NTSTATUS,        InstallSubdevice)
+    ( 
+        _In_opt_        PIRP                                        Irp,
+        _In_            PWSTR                                       Name,
+        _In_opt_        PWSTR                                       TemplateName,
+        _In_            REFGUID                                     PortClassId,
+        _In_            REFGUID                                     MiniportClassId,
+        _In_opt_        PFNCREATEMINIPORT                           MiniportCreate,
+        _In_            ULONG                                       cPropertyCount,
+        _In_reads_opt_(cPropertyCount) const SIMPLEAUDIOSAMPLE_DEVPROPERTY   * pProperties,
+        _In_opt_        PVOID                                       DeviceContext,
+        _In_            PENDPOINT_MINIPAIR                          MiniportPair,
+        _In_opt_        PRESOURCELIST                               ResourceList,
+        _In_            REFGUID                                     PortInterfaceId,
+        _Out_opt_       PUNKNOWN                                  * OutPortInterface,
+        _Out_opt_       PUNKNOWN                                  * OutPortUnknown,
+        _Out_opt_       PUNKNOWN                                  * OutMiniportUnknown
+    );    
+
+    STDMETHOD_(NTSTATUS,        UnregisterSubdevice)
+    (
+        THIS_
+        _In_opt_   PUNKNOWN     UnknownPort
+    );
+
+    STDMETHOD_(NTSTATUS,        ConnectTopologies)
+    (
+        THIS_
+        _In_ PUNKNOWN                   UnknownTopology,
+        _In_ PUNKNOWN                   UnknownWave,
+        _In_ PHYSICALCONNECTIONTABLE*   PhysicalConnections,
+        _In_ ULONG                      PhysicalConnectionCount
+    );
+
+    STDMETHOD_(NTSTATUS,        DisconnectTopologies)
+    (
+        THIS_
+        _In_ PUNKNOWN                   UnknownTopology,
+        _In_ PUNKNOWN                   UnknownWave,
+        _In_ PHYSICALCONNECTIONTABLE*   PhysicalConnections,
+        _In_ ULONG                      PhysicalConnectionCount
+    );
+
+    STDMETHOD_(NTSTATUS,        InstallEndpointFilters)
+    (
+        THIS_
+        _In_opt_    PIRP                Irp, 
+        _In_        PENDPOINT_MINIPAIR  MiniportPair,
+        _In_opt_    PVOID               DeviceContext,
+        _Out_opt_   PUNKNOWN *          UnknownTopology,
+        _Out_opt_   PUNKNOWN *          UnknownWave,
+        _Out_opt_   PUNKNOWN *          UnknownMiniportTopology,
+        _Out_opt_   PUNKNOWN *          UnknownMiniportWave
+    );
+
+    STDMETHOD_(NTSTATUS,        RemoveEndpointFilters)
+    (
+        THIS_
+        _In_        PENDPOINT_MINIPAIR  MiniportPair,
+        _In_opt_    PUNKNOWN            UnknownTopology,
+        _In_opt_    PUNKNOWN            UnknownWave
+    );
+
+    STDMETHOD_(NTSTATUS,        GetFilters)
+    (
+        THIS_
+        _In_        PENDPOINT_MINIPAIR  MiniportPair,
+        _Out_opt_   PUNKNOWN            *UnknownTopologyPort,
+        _Out_opt_   PUNKNOWN            *UnknownTopologyMiniport,
+        _Out_opt_   PUNKNOWN            *UnknownWavePort,
+        _Out_opt_   PUNKNOWN            *UnknownWaveMiniport
+    );
+
+    STDMETHOD_(NTSTATUS,        SetIdlePowerManagement)
+    (
+        THIS_
+        _In_        PENDPOINT_MINIPAIR  MiniportPair,
+        _In_        BOOL                bEnable
+    );
+
+    STDMETHOD_(VOID, Cleanup)();
+
+};
+
+typedef IAdapterCommon *PADAPTERCOMMON;
+
+//=============================================================================
+// Function Prototypes
+//=============================================================================
+NTSTATUS
+NewAdapterCommon
+( 
+    _Out_       PUNKNOWN *              Unknown,
+    _In_        REFCLSID,
+    _In_opt_    PUNKNOWN                UnknownOuter,
+    _In_        POOL_FLAGS              PoolFlags
+);
+
+#endif  //_SIMPLEAUDIOSAMPLE_COMMON_H_
diff --git a/audio/simpleaudiosample/Source/Inc/definitions.h b/audio/simpleaudiosample/Source/Inc/definitions.h
new file mode 100644
index 00000000..9fb4547a
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Inc/definitions.h
@@ -0,0 +1,198 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    Definitions.h
+
+Abstract:
+
+    Header file for common stuff.
+--*/
+
+#ifndef _SIMPLEAUDIOSAMPLE_DEFINITIONS_H_
+#define _SIMPLEAUDIOSAMPLE_DEFINITIONS_H_
+
+#include <portcls.h>
+#include <stdunk.h>
+#include <ksdebug.h>
+#include <ntintsafe.h>
+#include <wdf.h>
+#include <wdfminiport.h>
+#include <Ntstrsafe.h>
+#include "NewDelete.h"
+
+//=============================================================================
+// Defines
+//=============================================================================
+
+// Product Id
+// {836BA6D1-3FF7-4411-8BCD-469553452DCE}
+#define STATIC_PID_SIMPLEAUDIOSAMPLE\
+    0x836ba6d1, 0x3ff7, 0x4411, 0x8b, 0xcd, 0x46, 0x95, 0x53, 0x45, 0x2d, 0xce
+DEFINE_GUIDSTRUCT("836BA6D1-3FF7-4411-8BCD-469553452DCE", PID_SIMPLEAUDIOSAMPLE);
+#define PID_SIMPLEAUDIOSAMPLE DEFINE_GUIDNAMED(PID_SIMPLEAUDIOSAMPLE)
+
+// Pool tag used for SIMPLEAUDIOSAMPLE allocations
+#define SIMPLEAUDIOSAMPLE_POOLTAG               'SASM'  
+
+// Debug module name
+#define STR_MODULENAME              "SIMPLEAUDIOSAMPLE: "
+
+// Debug utility macros
+#define D_FUNC                      4
+#define D_BLAB                      DEBUGLVL_BLAB
+#define D_VERBOSE                   DEBUGLVL_VERBOSE        
+#define D_TERSE                     DEBUGLVL_TERSE          
+#define D_ERROR                     DEBUGLVL_ERROR          
+#define DPF                         _DbgPrintF
+#define DPF_ENTER(x)                DPF(D_FUNC, x)
+
+// Channel orientation
+#define CHAN_LEFT                   0
+#define CHAN_RIGHT                  1
+#define CHAN_MASTER                 (-1)
+
+// Dma Settings.
+#define DMA_BUFFER_SIZE             0x16000
+
+#define KSPROPERTY_TYPE_ALL         KSPROPERTY_TYPE_BASICSUPPORT | \
+                                    KSPROPERTY_TYPE_GET | \
+                                    KSPROPERTY_TYPE_SET
+
+// Specific node numbers
+#define DEV_SPECIFIC_VT_BOOL        9
+#define DEV_SPECIFIC_VT_I4          10
+#define DEV_SPECIFIC_VT_UI4         11
+
+#define _100NS_PER_MILLISECOND      10000                       // number of 100ns units per millisecond
+
+// Default volume settings.
+#define VOLUME_STEPPING_DELTA       0x8000
+#define VOLUME_SIGNED_MAXIMUM       0x00000000
+#define VOLUME_SIGNED_MINIMUM       (-96 * 0x10000)
+
+// Default peak meter settings
+#define PEAKMETER_STEPPING_DELTA    0x1000
+#define PEAKMETER_SIGNED_MAXIMUM    LONG_MAX
+#define PEAKMETER_SIGNED_MINIMUM    LONG_MIN
+
+#define VALUE_NORMALIZE_P(v, step) \
+    ((((v) + (step)/2) / (step)) * (step))
+
+#define VALUE_NORMALIZE(v, step) \
+    ((v) > 0 ? VALUE_NORMALIZE_P((v), (step)) : -(VALUE_NORMALIZE_P(-(v), (step))))
+
+#define VALUE_NORMALIZE_IN_RANGE_EX(v, min, max, step) \
+    ((v) > (max) ? (max) : \
+     (v) < (min) ? (min) : \
+     VALUE_NORMALIZE((v), (step)))
+
+// to normalize volume values.
+#define VOLUME_NORMALIZE_IN_RANGE(v) \
+    VALUE_NORMALIZE_IN_RANGE_EX((v), VOLUME_SIGNED_MINIMUM, VOLUME_SIGNED_MAXIMUM, VOLUME_STEPPING_DELTA)
+
+// to normalize sample peak meter.
+#define PEAKMETER_NORMALIZE_IN_RANGE(v) \
+    VALUE_NORMALIZE_IN_RANGE_EX((v), PEAKMETER_SIGNED_MINIMUM, PEAKMETER_SIGNED_MAXIMUM, PEAKMETER_STEPPING_DELTA)
+
+#define ALL_CHANNELS_ID             UINT32_MAX
+
+// Macros to assist with pin instance counting
+#define VERIFY_PIN_INSTANCE_RESOURCES_AVAILABLE(status, allocated, max) \
+    status = (allocated < max) ? STATUS_SUCCESS : STATUS_INSUFFICIENT_RESOURCES
+
+#define ALLOCATE_PIN_INSTANCE_RESOURCES(allocated) \
+    allocated++
+
+#define FREE_PIN_INSTANCE_RESOURCES(allocated) \
+    allocated--
+
+// Define the value data type for supported sound detector patterns. Only
+// one pattern type is supported in this sample.
+typedef struct {
+    KSMULTIPLE_ITEM MultipleItem;
+    GUID            PatternType[1];
+} CONTOSO_SUPPORTEDPATTERNSVALUE;
+
+//=============================================================================
+// Typedefs
+//=============================================================================
+
+// Flags to identify stream processing mode
+typedef enum {
+    CONNECTIONTYPE_TOPOLOGY_OUTPUT = 0,
+    CONNECTIONTYPE_WAVE_OUTPUT     = 1
+} CONNECTIONTYPE;
+
+// Connection table for registering topology/wave bridge connection
+typedef struct _PHYSICALCONNECTIONTABLE
+{
+    ULONG            ulTopology;
+    ULONG            ulWave;
+    CONNECTIONTYPE   eType;
+} PHYSICALCONNECTIONTABLE, *PPHYSICALCONNECTIONTABLE;
+
+//
+// This is the structure of the portclass FDO device extension Nt has created
+// for us.  We keep the adapter common object here.
+//
+struct IAdapterCommon;
+typedef struct _PortClassDeviceContext              // 32       64      Byte offsets for 32 and 64 bit architectures
+{
+    ULONG_PTR m_pulReserved1[2];                    // 0-7      0-15    First two pointers are reserved.
+    PDEVICE_OBJECT m_DoNotUsePhysicalDeviceObject;  // 8-11     16-23   Reserved pointer to our Physical Device Object (PDO).
+    PVOID m_pvReserved2;                            // 12-15    24-31   Reserved pointer to our Start Device function.
+    PVOID m_pvReserved3;                            // 16-19    32-39   "Out Memory" according to DDK.  
+    IAdapterCommon* m_pCommon;                      // 20-23    40-47   Pointer to our adapter common object.
+    PVOID m_pvUnused1;                              // 24-27    48-55   Unused space.
+    PVOID m_pvUnused2;                              // 28-31    56-63   Unused space.
+
+    // Anything after above line should not be used.
+    // This actually goes on for (64*sizeof(ULONG_PTR)) but it is all opaque.
+} PortClassDeviceContext;
+
+//
+// Major/MinorTarget to object casting.
+//
+#define MajorTarget_to_Obj(ptr) \
+    reinterpret_cast<CMiniportWaveRT*>(ptr)
+    
+#define MinorTarget_to_Obj(ptr) \
+    static_cast<CMiniportWaveRTStream*>(reinterpret_cast<PMINIPORTWAVERTSTREAM>(ptr))
+
+//
+// Global settings.
+//
+extern DWORD g_DoNotCreateDataFiles;
+extern DWORD g_DisableBthScoBypass;
+extern UNICODE_STRING g_RegistryPath;
+
+//=============================================================================
+// Function prototypes
+//=============================================================================
+
+// Generic topology handler
+NTSTATUS PropertyHandler_Topology
+( 
+    _In_  PPCPROPERTY_REQUEST PropertyRequest 
+);
+
+// Default WaveFilter automation table.
+// Handles the GeneralComponentId request.
+NTSTATUS PropertyHandler_WaveFilter
+(
+    _In_ PPCPROPERTY_REQUEST PropertyRequest
+);
+
+NTSTATUS PropertyHandler_GenericPin
+( 
+    _In_ PPCPROPERTY_REQUEST      PropertyRequest 
+);
+
+// common.h uses some of the above definitions.
+#include "common.h"
+#include "kshelper.h"
+
+#endif // _SIMPLEAUDIOSAMPLE_DEFINITIONS_H_
diff --git a/audio/simpleaudiosample/Source/Inc/endpoints.h b/audio/simpleaudiosample/Source/Inc/endpoints.h
new file mode 100644
index 00000000..44a858a0
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Inc/endpoints.h
@@ -0,0 +1,133 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    endpoints.h
+
+Abstract:
+
+    Node and Pin numbers and other common definitions for simple audio sample.
+--*/
+
+#ifndef _SIMPLEAUDIOSAMPLE_ENDPOINTS_H_
+#define _SIMPLEAUDIOSAMPLE_ENDPOINTS_H_
+
+// Name Guid
+// {0104947F-82AE-4291-A6F3-5E2DE1AD7DC2}
+#define STATIC_NAME_SIMPLE_AUDIO_SAMPLE\
+    0x104947f, 0x82ae, 0x4291, 0xa6, 0xf3, 0x5e, 0x2d, 0xe1, 0xad, 0x7d, 0xc2
+DEFINE_GUIDSTRUCT("0104947F-82AE-4291-A6F3-5E2DE1AD7DC2", NAME_SIMPLE_AUDIO_SAMPLE);
+#define NAME_SIMPLE_AUDIO_SAMPLE DEFINE_GUIDNAMED(NAME_SIMPLE_AUDIO_SAMPLE)
+
+//----------------------------------------------------
+// New defines for the render endpoints.
+//----------------------------------------------------
+
+// Default pin instances.
+#define MAX_INPUT_SYSTEM_STREAMS        1
+
+// Wave pins - no mix, no offload
+enum 
+{
+    KSPIN_WAVE_RENDER3_SINK_SYSTEM = 0, 
+    KSPIN_WAVE_RENDER3_SOURCE
+};
+
+// Wave pins - offloading is NOT supported.
+enum 
+{
+    KSPIN_WAVE_RENDER2_SINK_SYSTEM = 0, 
+    KSPIN_WAVE_RENDER2_SINK_LOOPBACK, 
+    KSPIN_WAVE_RENDER2_SOURCE
+};
+
+// Wave Topology nodes - offloading is NOT supported.
+enum 
+{
+    KSNODE_WAVE_SUM = 0,
+    KSNODE_WAVE_VOLUME,
+    KSNODE_WAVE_MUTE,
+    KSNODE_WAVE_PEAKMETER
+};
+
+// Topology pins.
+enum
+{
+    KSPIN_TOPO_WAVEOUT_SOURCE = 0,
+    KSPIN_TOPO_LINEOUT_DEST,
+};
+
+// Topology nodes.
+enum
+{
+    KSNODE_TOPO_WAVEOUT_VOLUME = 0,
+    KSNODE_TOPO_WAVEOUT_MUTE,
+    KSNODE_TOPO_WAVEOUT_PEAKMETER
+};
+
+//----------------------------------------------------
+// New defines for the capture endpoints.
+//----------------------------------------------------
+
+// Default pin instances.
+#define MAX_INPUT_STREAMS           1       // Number of capture streams.
+
+// Wave pins
+enum 
+{
+    KSPIN_WAVE_BRIDGE = 0,
+    KSPIN_WAVEIN_HOST,
+};
+
+// Wave Topology nodes.
+enum 
+{
+    KSNODE_WAVE_ADC = 0
+};
+
+// Wave Topology nodes.
+enum 
+{
+    KSNODE_WAVE_DAC = 0
+};
+
+// topology pins.
+enum
+{
+    KSPIN_TOPO_MIC_ELEMENTS,
+    KSPIN_TOPO_BRIDGE
+};
+
+// topology nodes.
+enum
+{
+    KSNODE_TOPO_VOLUME,
+    KSNODE_TOPO_MUTE,
+    KSNODE_TOPO_PEAKMETER
+};
+
+// data format attribute range definitions.
+static
+KSATTRIBUTE PinDataRangeSignalProcessingModeAttribute =
+{
+    sizeof(KSATTRIBUTE),
+    0,
+    STATICGUIDOF(KSATTRIBUTEID_AUDIOSIGNALPROCESSING_MODE),
+};
+
+static
+PKSATTRIBUTE PinDataRangeAttributes[] =
+{
+    &PinDataRangeSignalProcessingModeAttribute,
+};
+
+static
+KSATTRIBUTE_LIST PinDataRangeAttributeList =
+{
+    ARRAYSIZE(PinDataRangeAttributes),
+    PinDataRangeAttributes,
+};
+
+#endif // _SIMPLEAUDIOSAMPLE_ENDPOINTS_H_
diff --git a/audio/simpleaudiosample/Source/Inc/kshelper.h b/audio/simpleaudiosample/Source/Inc/kshelper.h
new file mode 100644
index 00000000..023f773a
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Inc/kshelper.h
@@ -0,0 +1,159 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    kshelper.h
+
+Abstract:
+
+    Helper functions for simple audio sample
+--*/
+#ifndef _SIMPLEAUDIOSAMPLE_KSHELPER_H_
+#define _SIMPLEAUDIOSAMPLE_KSHELPER_H_
+
+#include <portcls.h>
+#include <ksdebug.h>
+
+PWAVEFORMATEX                   
+GetWaveFormatEx
+(
+    _In_  PKSDATAFORMAT           pDataFormat
+);
+
+NTSTATUS                        
+ValidatePropertyParams
+(
+    _In_ PPCPROPERTY_REQUEST      PropertyRequest, 
+    _In_ ULONG                    cbValueSize,
+    _In_ ULONG                    cbInstanceSize = 0 
+);
+
+NTSTATUS
+PropertyHandler_BasicSupport
+(
+    _In_  PPCPROPERTY_REQUEST     PropertyRequest,
+    _In_  ULONG                   Flags,
+    _In_  DWORD                   PropTypeSetId
+);
+
+NTSTATUS
+PropertyHandler_BasicSupportVolume
+(
+    _In_  PPCPROPERTY_REQUEST   PropertyRequest,
+    _In_  ULONG                 MaxChannels
+);
+
+NTSTATUS
+PropertyHandler_BasicSupportMute
+(
+    _In_  PPCPROPERTY_REQUEST   PropertyRequest,
+    _In_  ULONG                 MaxChannels
+);
+
+NTSTATUS
+PropertyHandler_BasicSupportPeakMeter2
+(
+    _In_  PPCPROPERTY_REQUEST   PropertyRequest,
+    _In_  ULONG                 MaxChannels
+);
+
+NTSTATUS
+PropertyHandler_CpuResources
+( 
+    _In_  PPCPROPERTY_REQUEST     PropertyRequest 
+);
+
+NTSTATUS
+PropertyHandler_Volume
+(
+    _In_  PADAPTERCOMMON        AdapterCommon,
+    _In_  PPCPROPERTY_REQUEST   PropertyRequest,
+    _In_  ULONG                 MaxChannels
+);
+
+NTSTATUS                            
+PropertyHandler_Mute
+(
+    _In_  PADAPTERCOMMON        AdapterCommon,
+    _In_  PPCPROPERTY_REQUEST   PropertyRequest,
+    _In_  ULONG                 MaxChannels
+);
+
+NTSTATUS
+PropertyHandler_PeakMeter2
+(
+    _In_  PADAPTERCOMMON        AdapterCommon,
+    _In_  PPCPROPERTY_REQUEST   PropertyRequest,
+    _In_  ULONG                 MaxChannels
+);
+
+//=============================================================================
+// Property helpers
+//=============================================================================
+
+NTSTATUS
+SimpleAudioSamplePropertyDispatch
+(
+    _In_ PPCPROPERTY_REQUEST PropertyRequest
+);
+
+// Use this structure to define property items with extra data allowing easier
+// definition of separate get, set, and support handlers dispatched through
+// SimpleAudioSamplePropertyDispatch.
+typedef struct
+{
+    PCPROPERTY_ITEM         PropertyItem;       // Standard PCPROPERTY_ITEM
+    ULONG                   MinProperty;        // Minimum size of the property instance data
+    ULONG                   MinData;            // Minimum size of the property value
+    PCPFNPROPERTY_HANDLER   GetHandler;         // Property get handler (NULL if GET not supported)
+    PCPFNPROPERTY_HANDLER   SetHandler;         // Property set handler (NULL if SET not supported)
+    PCPFNPROPERTY_HANDLER   SupportHandler;     // Property support handler (NULL for common handler)
+    VOID                    *ContextData;        // Optional context information for the handler, NULL for unused
+    ULONG                   ContextDataSize;     // Size of the data held at ContextData, 0 for unused
+} SIMPLEAUDIOSAMPLE_PROPERTY_ITEM;
+
+// The following macros facilitate adding property handlers to a class, allowing
+// easier declaration and definition of a "thunk" routine that directly handles
+// the property request and calls into a class instance method. Note that as
+// written, the thunk routine assumes PAGED_CODE.
+#define DECLARE_CLASSPROPERTYHANDLER(theClass, theMethod)                       \
+NTSTATUS theClass##_##theMethod                                                 \
+(                                                                               \
+    _In_ PPCPROPERTY_REQUEST PropertyRequest                                    \
+);
+
+#define DECLARE_PROPERTYHANDLER(theMethod)                                      \
+NTSTATUS theMethod                                                              \
+(                                                                               \
+    _In_ PPCPROPERTY_REQUEST PropertyRequest                                    \
+);
+
+#define DEFINE_CLASSPROPERTYHANDLER(theClass, theMethod)                        \
+NTSTATUS theClass##_##theMethod                                                 \
+(                                                                               \
+    _In_ PPCPROPERTY_REQUEST PropertyRequest                                    \
+)                                                                               \
+{                                                                               \
+    NTSTATUS status;                                                            \
+                                                                                \
+    PAGED_CODE();                                                               \
+                                                                                \
+    theClass* p = reinterpret_cast<theClass*>(PropertyRequest->MajorTarget);    \
+                                                                                \
+    p->AddRef();                                                                \
+    status = p->theMethod(PropertyRequest);                                     \
+    p->Release();                                                               \
+                                                                                \
+    return status;                                                              \
+}                                                                               \
+NTSTATUS theClass::theMethod                                                    \
+(                                                                               \
+    _In_ PPCPROPERTY_REQUEST PropertyRequest                                    \
+)
+
+
+
+
+#endif  // _SIMPLEAUDIOSAMPLE_KSHELPER_H_
diff --git a/audio/simpleaudiosample/Source/Inc/mintopo.h b/audio/simpleaudiosample/Source/Inc/mintopo.h
new file mode 100644
index 00000000..5e7fe466
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Inc/mintopo.h
@@ -0,0 +1,81 @@
+
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    minitopo.h
+
+Abstract:
+
+    Declaration of topology miniport.
+--*/
+
+#ifndef _SIMPLEAUDIOSAMPLE_MINTOPO_H_
+#define _SIMPLEAUDIOSAMPLE_MINTOPO_H_
+
+#include "basetopo.h"
+
+//=============================================================================
+// Classes
+//=============================================================================
+
+///////////////////////////////////////////////////////////////////////////////
+// CMiniportTopology 
+//   
+
+class CMiniportTopology : 
+    public CMiniportTopologySimpleAudioSample,
+    public IMiniportTopology,
+    public CUnknown
+{
+  private:
+    eDeviceType             m_DeviceType;
+
+    union {
+        PVOID               m_DeviceContext;
+    };
+
+public:
+    DECLARE_STD_UNKNOWN();
+    CMiniportTopology
+    (
+        _In_opt_    PUNKNOWN                UnknownOuter,
+        _In_        PCFILTER_DESCRIPTOR    *FilterDesc,
+        _In_        USHORT                  DeviceMaxChannels,
+        _In_        eDeviceType             DeviceType, 
+        _In_opt_    PVOID                   DeviceContext
+    )
+    : CUnknown(UnknownOuter),
+      CMiniportTopologySimpleAudioSample(FilterDesc, DeviceMaxChannels),
+      m_DeviceType(DeviceType),
+      m_DeviceContext(DeviceContext)
+    {
+    }
+
+    ~CMiniportTopology();
+
+    IMP_IMiniportTopology;
+
+    NTSTATUS PropertyHandlerJackDescription
+    (
+        _In_        PPCPROPERTY_REQUEST                         PropertyRequest,
+        _In_        ULONG                                       cJackDescriptions,
+        _In_reads_(cJackDescriptions) PKSJACK_DESCRIPTION       *JackDescriptions
+    );
+
+    NTSTATUS PropertyHandlerJackDescription2
+    ( 
+        _In_        PPCPROPERTY_REQUEST                         PropertyRequest,
+        _In_        ULONG                                       cJackDescriptions,
+        _In_reads_(cJackDescriptions) PKSJACK_DESCRIPTION       *JackDescriptions,
+        _In_        DWORD                                       JackCapabilities
+    );
+    
+    PVOID GetDeviceContext() { return m_DeviceContext;  }
+};
+
+typedef CMiniportTopology *PCMiniportTopology;
+
+#endif // _SIMPLEAUDIOSAMPLE_MINTOPO_H_
diff --git a/audio/simpleaudiosample/Source/Main/Main.vcxproj b/audio/simpleaudiosample/Source/Main/Main.vcxproj
new file mode 100644
index 00000000..fabab156
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Main/Main.vcxproj
@@ -0,0 +1,478 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|ARM64">
+      <Configuration>Debug</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|ARM64">
+      <Configuration>Release</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{E4DF0EEE-D35B-47F2-A9B1-41EA97C465FF}</ProjectGuid>
+    <RootNamespace>$(MSBuildProjectName)</RootNamespace>
+    <KMDF_VERSION_MAJOR>1</KMDF_VERSION_MAJOR>
+    <SupportsPackaging>false</SupportsPackaging>
+    <RequiresPackageProject>true</RequiresPackageProject>
+    <Configuration Condition="'$(Configuration)' == ''">Debug</Configuration>
+    <Platform Condition="'$(Platform)' == ''">Win32</Platform>
+    <SampleGuid>{2A9A946E-F017-4E0D-BF75-AD81E7E97D64}</SampleGuid>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Label="Configuration" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>False</UseDebugLibraries>
+    <DriverTargetPlatform>Universal</DriverTargetPlatform>
+    <DriverType>KMDF</DriverType>
+    <PlatformToolset>WindowsKernelModeDriver10.0</PlatformToolset>
+    <ConfigurationType>Driver</ConfigurationType>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'" Label="Configuration">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>False</UseDebugLibraries>
+    <DriverTargetPlatform>Universal</DriverTargetPlatform>
+    <DriverType>KMDF</DriverType>
+    <PlatformToolset>WindowsKernelModeDriver10.0</PlatformToolset>
+    <ConfigurationType>Driver</ConfigurationType>
+  </PropertyGroup>
+  <PropertyGroup Label="Configuration" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>True</UseDebugLibraries>
+    <DriverTargetPlatform>Universal</DriverTargetPlatform>
+    <DriverType>KMDF</DriverType>
+    <PlatformToolset>WindowsKernelModeDriver10.0</PlatformToolset>
+    <ConfigurationType>Driver</ConfigurationType>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'" Label="Configuration">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>True</UseDebugLibraries>
+    <DriverTargetPlatform>Universal</DriverTargetPlatform>
+    <DriverType>KMDF</DriverType>
+    <PlatformToolset>WindowsKernelModeDriver10.0</PlatformToolset>
+    <ConfigurationType>Driver</ConfigurationType>
+  </PropertyGroup>
+  <PropertyGroup Label="Configuration" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>False</UseDebugLibraries>
+    <DriverTargetPlatform>Universal</DriverTargetPlatform>
+    <DriverType>KMDF</DriverType>
+    <PlatformToolset>WindowsKernelModeDriver10.0</PlatformToolset>
+    <ConfigurationType>Driver</ConfigurationType>
+  </PropertyGroup>
+  <PropertyGroup Label="Configuration" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>True</UseDebugLibraries>
+    <DriverTargetPlatform>Universal</DriverTargetPlatform>
+    <DriverType>KMDF</DriverType>
+    <PlatformToolset>WindowsKernelModeDriver10.0</PlatformToolset>
+    <ConfigurationType>Driver</ConfigurationType>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <PropertyGroup>
+    <OutDir>$(IntDir)</OutDir>
+  </PropertyGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
+  </ImportGroup>
+  <ItemGroup Label="WrappedTaskItems" />
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <Link>
+      <AdditionalDependencies>%(AdditionalDependencies);$(DDK_LIB_PATH)\portcls.lib;$(DDK_LIB_PATH)\stdunk.lib;$(DDK_LIB_PATH)\libcntpr.lib</AdditionalDependencies>
+    </Link>
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_WIN32;UNICODE;_UNICODE;PC_IMPLEMENTATION</PreprocessorDefinitions>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);DEBUG_LEVEL=DEBUGLVL_TERSE</PreprocessorDefinitions>
+    </ResourceCompile>
+    <ClCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <WarningLevel>Level4</WarningLevel>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_WIN32;UNICODE;_UNICODE;PC_IMPLEMENTATION</PreprocessorDefinitions>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);DEBUG_LEVEL=DEBUGLVL_TERSE</PreprocessorDefinitions>
+    </ClCompile>
+    <Midl>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_WIN32;UNICODE;_UNICODE;PC_IMPLEMENTATION</PreprocessorDefinitions>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);DEBUG_LEVEL=DEBUGLVL_TERSE</PreprocessorDefinitions>
+    </Midl>
+	<DriverSign>
+      <FileDigestAlgorithm>SHA256</FileDigestAlgorithm>
+    </DriverSign>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'">
+    <Link>
+      <AdditionalDependencies>%(AdditionalDependencies);$(DDK_LIB_PATH)\portcls.lib;$(DDK_LIB_PATH)\stdunk.lib;$(DDK_LIB_PATH)\libcntpr.lib</AdditionalDependencies>
+    </Link>
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_WIN32;UNICODE;_UNICODE;PC_IMPLEMENTATION</PreprocessorDefinitions>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);DEBUG_LEVEL=DEBUGLVL_TERSE</PreprocessorDefinitions>
+    </ResourceCompile>
+    <ClCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <WarningLevel>Level4</WarningLevel>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_WIN32;UNICODE;_UNICODE;PC_IMPLEMENTATION</PreprocessorDefinitions>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);DEBUG_LEVEL=DEBUGLVL_TERSE</PreprocessorDefinitions>
+    </ClCompile>
+    <Midl>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_WIN32;UNICODE;_UNICODE;PC_IMPLEMENTATION</PreprocessorDefinitions>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);DEBUG_LEVEL=DEBUGLVL_TERSE</PreprocessorDefinitions>
+    </Midl>
+	<DriverSign>
+	  <FileDigestAlgorithm>SHA256</FileDigestAlgorithm>
+	</DriverSign>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <Link>
+      <AdditionalDependencies>%(AdditionalDependencies);$(DDK_LIB_PATH)\portcls.lib;$(DDK_LIB_PATH)\stdunk.lib;$(DDK_LIB_PATH)\libcntpr.lib</AdditionalDependencies>
+    </Link>
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_WIN32;UNICODE;_UNICODE;PC_IMPLEMENTATION</PreprocessorDefinitions>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);DEBUG_LEVEL=DEBUGLVL_TERSE</PreprocessorDefinitions>
+    </ResourceCompile>
+    <ClCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <WarningLevel>Level4</WarningLevel>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_WIN32;UNICODE;_UNICODE;PC_IMPLEMENTATION</PreprocessorDefinitions>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);DEBUG_LEVEL=DEBUGLVL_TERSE</PreprocessorDefinitions>
+    </ClCompile>
+    <Midl>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_WIN32;UNICODE;_UNICODE;PC_IMPLEMENTATION</PreprocessorDefinitions>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);DEBUG_LEVEL=DEBUGLVL_TERSE</PreprocessorDefinitions>
+    </Midl>
+	<DriverSign>
+      <FileDigestAlgorithm>SHA256</FileDigestAlgorithm>
+	</DriverSign>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">
+    <Link>
+      <AdditionalDependencies>%(AdditionalDependencies);$(DDK_LIB_PATH)\portcls.lib;$(DDK_LIB_PATH)\stdunk.lib;$(DDK_LIB_PATH)\libcntpr.lib</AdditionalDependencies>
+    </Link>
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_WIN32;UNICODE;_UNICODE;PC_IMPLEMENTATION</PreprocessorDefinitions>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);DEBUG_LEVEL=DEBUGLVL_TERSE</PreprocessorDefinitions>
+    </ResourceCompile>
+    <ClCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <WarningLevel>Level4</WarningLevel>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_WIN32;UNICODE;_UNICODE;PC_IMPLEMENTATION</PreprocessorDefinitions>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);DEBUG_LEVEL=DEBUGLVL_TERSE</PreprocessorDefinitions>
+    </ClCompile>
+    <Midl>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_WIN32;UNICODE;_UNICODE;PC_IMPLEMENTATION</PreprocessorDefinitions>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);DEBUG_LEVEL=DEBUGLVL_TERSE</PreprocessorDefinitions>
+    </Midl>
+	<DriverSign>
+      <FileDigestAlgorithm>SHA256</FileDigestAlgorithm>
+	</DriverSign>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Link>
+      <AdditionalDependencies>%(AdditionalDependencies);$(DDK_LIB_PATH)\portcls.lib;$(DDK_LIB_PATH)\stdunk.lib;$(DDK_LIB_PATH)\libcntpr.lib</AdditionalDependencies>
+    </Link>
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_WIN32;UNICODE;_UNICODE;PC_IMPLEMENTATION</PreprocessorDefinitions>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);DEBUG_LEVEL=DEBUGLVL_TERSE</PreprocessorDefinitions>
+    </ResourceCompile>
+    <ClCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <WarningLevel>Level4</WarningLevel>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_WIN32;UNICODE;_UNICODE;PC_IMPLEMENTATION</PreprocessorDefinitions>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);DEBUG_LEVEL=DEBUGLVL_TERSE</PreprocessorDefinitions>
+    </ClCompile>
+    <Midl>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_WIN32;UNICODE;_UNICODE;PC_IMPLEMENTATION</PreprocessorDefinitions>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);DEBUG_LEVEL=DEBUGLVL_TERSE</PreprocessorDefinitions>
+    </Midl>
+	<DriverSign>
+      <FileDigestAlgorithm>SHA256</FileDigestAlgorithm>
+	</DriverSign>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Link>
+      <AdditionalDependencies>%(AdditionalDependencies);$(DDK_LIB_PATH)\portcls.lib;$(DDK_LIB_PATH)\stdunk.lib;$(DDK_LIB_PATH)\libcntpr.lib</AdditionalDependencies>
+    </Link>
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_WIN32;UNICODE;_UNICODE;PC_IMPLEMENTATION</PreprocessorDefinitions>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);DEBUG_LEVEL=DEBUGLVL_TERSE</PreprocessorDefinitions>
+    </ResourceCompile>
+    <ClCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <WarningLevel>Level4</WarningLevel>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_WIN32;UNICODE;_UNICODE;PC_IMPLEMENTATION</PreprocessorDefinitions>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);DEBUG_LEVEL=DEBUGLVL_TERSE</PreprocessorDefinitions>
+    </ClCompile>
+    <Midl>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_WIN32;UNICODE;_UNICODE;PC_IMPLEMENTATION</PreprocessorDefinitions>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);DEBUG_LEVEL=DEBUGLVL_TERSE</PreprocessorDefinitions>
+    </Midl>
+	<DriverSign>
+      <FileDigestAlgorithm>SHA256</FileDigestAlgorithm>
+	</DriverSign>
+  </ItemDefinitionGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <TargetName>SimpleAudioSample</TargetName>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'">
+    <TargetName>SimpleAudioSample</TargetName>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <TargetName>SimpleAudioSample</TargetName>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">
+    <TargetName>SimpleAudioSample</TargetName>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <TargetName>SimpleAudioSample</TargetName>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <TargetName>SimpleAudioSample</TargetName>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <Link>
+      <AdditionalDependencies>%(AdditionalDependencies);.\..\Utilities\$(IntDir)\Utilities.lib</AdditionalDependencies>
+    </Link>
+    <Link>
+      <AdditionalDependencies>%(AdditionalDependencies);.\..\Filters\$(IntDir)\Filters.lib</AdditionalDependencies>
+    </Link>
+    <ClCompile>
+      <!--
+        Use one of the following pre-processor defines to select the right power management:
+                - _USE_IPortClsRuntimePower
+                - _USE_SingleComponentMultiFxStates
+        Note that the single-component/multi-state feature requires also a registry 
+        value set via the INF. The name of the registry value is SingleComponentMultiFxStates.
+        see INF file for more info.
+    -->
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_USE_IPortClsRuntimePower;_NEW_DELETE_OPERATORS_</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Utilities;.</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Filters;.</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc;.</AdditionalIncludeDirectories>
+      <ExceptionHandling>
+      </ExceptionHandling>
+    </ClCompile>
+    <Midl>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_USE_IPortClsRuntimePower</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Utilities</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Filters</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+    </Midl>
+    <ResourceCompile>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_USE_IPortClsRuntimePower</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Utilities</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Filters</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+    </ResourceCompile>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'">
+    <Link>
+      <AdditionalDependencies>%(AdditionalDependencies);.\..\Utilities\$(IntDir)\Utilities.lib</AdditionalDependencies>
+    </Link>
+    <Link>
+      <AdditionalDependencies>%(AdditionalDependencies);.\..\Filters\$(IntDir)\Filters.lib</AdditionalDependencies>
+    </Link>
+    <ClCompile>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_USE_IPortClsRuntimePower;_NEW_DELETE_OPERATORS_</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Utilities;.</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Filters;.</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc;.</AdditionalIncludeDirectories>
+      <ExceptionHandling>
+      </ExceptionHandling>
+    </ClCompile>
+    <Midl>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_USE_IPortClsRuntimePower</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Utilities</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Filters</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+    </Midl>
+    <ResourceCompile>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_USE_IPortClsRuntimePower</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Utilities</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Filters</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+    </ResourceCompile>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <Link>
+      <AdditionalDependencies>%(AdditionalDependencies);.\..\Utilities\$(IntDir)\Utilities.lib</AdditionalDependencies>
+    </Link>
+    <Link>
+      <AdditionalDependencies>%(AdditionalDependencies);.\..\Filters\$(IntDir)\Filters.lib</AdditionalDependencies>
+    </Link>
+    <ClCompile>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_USE_IPortClsRuntimePower;_NEW_DELETE_OPERATORS_</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Utilities;.</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Filters;.</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc;.</AdditionalIncludeDirectories>
+      <ExceptionHandling>
+      </ExceptionHandling>
+    </ClCompile>
+    <Midl>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_USE_IPortClsRuntimePower</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Utilities</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Filters</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+    </Midl>
+    <ResourceCompile>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_USE_IPortClsRuntimePower</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Utilities</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Filters</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+    </ResourceCompile>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">
+    <Link>
+      <AdditionalDependencies>%(AdditionalDependencies);.\..\Utilities\$(IntDir)\Utilities.lib</AdditionalDependencies>
+    </Link>
+    <Link>
+      <AdditionalDependencies>%(AdditionalDependencies);.\..\Filters\$(IntDir)\Filters.lib</AdditionalDependencies>
+    </Link>
+    <ClCompile>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_USE_IPortClsRuntimePower;_NEW_DELETE_OPERATORS_</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Utilities;.</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Filters;.</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc;.</AdditionalIncludeDirectories>
+      <ExceptionHandling>
+      </ExceptionHandling>
+    </ClCompile>
+    <Midl>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_USE_IPortClsRuntimePower</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Utilities</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Filters</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+    </Midl>
+    <ResourceCompile>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_USE_IPortClsRuntimePower</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Utilities</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Filters</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+    </ResourceCompile>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Link>
+      <AdditionalDependencies>%(AdditionalDependencies);.\..\Utilities\$(IntDir)\Utilities.lib</AdditionalDependencies>
+    </Link>
+    <Link>
+      <AdditionalDependencies>%(AdditionalDependencies);.\..\Filters\$(IntDir)\Filters.lib</AdditionalDependencies>
+    </Link>
+    <ClCompile>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_USE_IPortClsRuntimePower;_NEW_DELETE_OPERATORS_</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Utilities;.</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Filters;.</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc;.</AdditionalIncludeDirectories>
+      <ExceptionHandling>
+      </ExceptionHandling>
+    </ClCompile>
+    <Midl>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_USE_IPortClsRuntimePower</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Utilities</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Filters</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+    </Midl>
+    <ResourceCompile>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_USE_IPortClsRuntimePower</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Utilities</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Filters</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+    </ResourceCompile>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Link>
+      <AdditionalDependencies>%(AdditionalDependencies);.\..\Utilities\$(IntDir)\Utilities.lib</AdditionalDependencies>
+    </Link>
+    <Link>
+      <AdditionalDependencies>%(AdditionalDependencies);.\..\Filters\$(IntDir)\Filters.lib</AdditionalDependencies>
+    </Link>
+    <ClCompile>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_USE_IPortClsRuntimePower;_NEW_DELETE_OPERATORS_</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Utilities;.</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Filters;.</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc;.</AdditionalIncludeDirectories>
+      <ExceptionHandling>
+      </ExceptionHandling>
+    </ClCompile>
+    <Midl>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_USE_IPortClsRuntimePower</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Utilities</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Filters</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+    </Midl>
+    <ResourceCompile>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_USE_IPortClsRuntimePower</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Utilities</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Filters</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+    </ResourceCompile>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="adapter.cpp" />
+    <ClCompile Include="basetopo.cpp" />
+    <ClCompile Include="common.cpp" />
+    <ClCompile Include="mintopo.cpp" />
+    <ClCompile Include="minwavert.cpp" />
+    <ClCompile Include="minwavertstream.cpp" />
+    <ClCompile Include="newdelete.cpp" />
+    <ResourceCompile Include="SimpleAudioSample.rc" />
+  </ItemGroup>
+  <ItemGroup>
+    <Inf Exclude="@(Inx)" Include="*.inx" />
+    <FilesToPackage Include="$(TargetPath)" Condition="'$(ConfigurationType)'=='Driver' or '$(ConfigurationType)'=='DynamicLibrary'" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Exclude="@(None)" Include="*.txt;*.htm;*.html" />
+    <None Exclude="@(None)" Include="*.ico;*.cur;*.bmp;*.dlg;*.rct;*.gif;*.jpg;*.jpeg;*.wav;*.jpe;*.tiff;*.tif;*.png;*.rc2" />
+    <None Exclude="@(None)" Include="*.def;*.bat;*.hpj;*.asmx" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Exclude="@(ClInclude)" Include="*.h;*.hpp;*.hxx;*.hm;*.inl;*.xsd" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+</Project>
diff --git a/audio/simpleaudiosample/Source/Main/Main.vcxproj.Filters b/audio/simpleaudiosample/Source/Main/Main.vcxproj.Filters
new file mode 100644
index 00000000..0669f019
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Main/Main.vcxproj.Filters
@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+    <ItemGroup>
+        <Filter Include="Source Files">
+            <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx;*</Extensions>
+            <UniqueIdentifier>{7FE326AE-6214-4FE0-A27B-F229A098BDBC}</UniqueIdentifier>
+        </Filter>
+        <Filter Include="Header Files">
+            <Extensions>h;hpp;hxx;hm;inl;inc;xsd</Extensions>
+            <UniqueIdentifier>{64C16D2B-849C-4264-A615-18A8E8AC9505}</UniqueIdentifier>
+        </Filter>
+        <Filter Include="Resource Files">
+            <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms;man;xml</Extensions>
+            <UniqueIdentifier>{46FAF4E8-F18C-4797-9CFA-2F3473BCB316}</UniqueIdentifier>
+        </Filter>
+        <Filter Include="Driver Files">
+            <Extensions>inf;inv;inx;mof;mc;</Extensions>
+            <UniqueIdentifier>{EE8F0A00-C1F0-4CB4-80E3-5FCC378E0BF4}</UniqueIdentifier>
+        </Filter>
+    </ItemGroup>
+    <ItemGroup>
+        <ClCompile Include="..\*.cpp">
+            <Filter>Source Files</Filter>
+        </ClCompile>
+        <ClCompile Include="*.cpp">
+            <Filter>Source Files</Filter>
+        </ClCompile>
+    </ItemGroup>
+    <ItemGroup>
+        <ResourceCompile Include="SimpleAudioSample.rc">
+            <Filter>Resource Files</Filter>
+        </ResourceCompile>
+    </ItemGroup>
+    <ItemGroup>
+        <ClInclude Include="*.h;*.hpp;*.hxx;*.hm;*.inl;*.xsd">
+            <Filter>Header Files</Filter>
+        </ClInclude>
+    </ItemGroup>
+    <ItemGroup>
+        <Inf Include="*.inx">
+            <Filter>Driver Files</Filter>
+        </Inf>
+    </ItemGroup>
+</Project>
diff --git a/audio/simpleaudiosample/Source/Main/NewDelete.cpp b/audio/simpleaudiosample/Source/Main/NewDelete.cpp
new file mode 100644
index 00000000..8ef3797d
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Main/NewDelete.cpp
@@ -0,0 +1,141 @@
+/*****************************************************************************
+* NewDelete.cpp -  CPP placement new and delete operators implementation
+*****************************************************************************
+* Copyright (c) Microsoft Corporation All Rights Reserved
+*
+* Module Name:
+*
+* NewDelete.cpp
+*
+* Abstract:
+*
+*   Definition of placement new and delete operators.
+*
+*/
+
+#ifdef _NEW_DELETE_OPERATORS_
+#ifdef __cplusplus
+extern "C" {
+#include <wdm.h>
+}
+#else
+#include <wdm.h>
+#endif
+
+#include "newDelete.h"
+#include "definitions.h"
+
+#pragma code_seg()
+/*****************************************************************************
+* Functions
+*/
+
+/*****************************************************************************
+* ::new()
+*****************************************************************************
+* New function for creating objects with a specified allocation tag.
+*/
+PVOID operator new
+(
+    size_t      iSize,
+    POOL_FLAGS  poolFlags,
+    ULONG       tag
+)
+{
+    PVOID result = ExAllocatePool2(poolFlags, iSize, tag);
+
+    return result;
+}
+
+
+/*****************************************************************************
+* ::new()
+*****************************************************************************
+* New function for creating objects with a specified allocation tag.
+*/
+PVOID operator new
+(
+    size_t      iSize,
+    POOL_FLAGS  poolFlags
+)
+{
+    PVOID result = ExAllocatePool2(poolFlags, iSize, SIMPLEAUDIOSAMPLE_POOLTAG);
+
+    return result;
+}
+
+
+/*****************************************************************************
+* ::delete()
+*****************************************************************************
+* Delete with tag function.
+*/
+void __cdecl operator delete
+(
+    PVOID pVoid,
+    ULONG tag
+)
+{
+    if (pVoid)
+    {
+        ExFreePoolWithTag(pVoid, tag);
+    }
+}
+
+
+/*****************************************************************************
+* ::delete()
+*****************************************************************************
+* Sized Delete function.
+*/
+void __cdecl operator delete
+(
+    _Pre_maybenull_ __drv_freesMem(Mem) PVOID pVoid,
+    _In_ size_t cbSize
+)
+{
+    UNREFERENCED_PARAMETER(cbSize);
+
+    if (pVoid)
+    {
+        ExFreePoolWithTag(pVoid, SIMPLEAUDIOSAMPLE_POOLTAG);
+    }
+}
+
+
+/*****************************************************************************
+* ::delete()
+*****************************************************************************
+* Sized Array Delete function.
+*/
+void __cdecl operator delete[]
+(
+    _Pre_maybenull_ __drv_freesMem(Mem) PVOID pVoid,
+    _In_ size_t cbSize
+)
+{
+    UNREFERENCED_PARAMETER(cbSize);
+
+    if (pVoid)
+    {
+        ExFreePoolWithTag(pVoid, SIMPLEAUDIOSAMPLE_POOLTAG);
+    }
+}
+
+
+/*****************************************************************************
+* ::delete()
+*****************************************************************************
+* Array Delete function.
+*/
+void __cdecl operator delete[]
+(
+    _Pre_maybenull_ __drv_freesMem(Mem) PVOID pVoid
+)
+{
+    if (pVoid)
+    {
+        ExFreePoolWithTag(pVoid, SIMPLEAUDIOSAMPLE_POOLTAG);
+    }
+}
+#endif//_NEW_DELETE_OPERATORS_
diff --git a/audio/simpleaudiosample/Source/Main/SimpleAudioSample.inx b/audio/simpleaudiosample/Source/Main/SimpleAudioSample.inx
new file mode 100644
index 00000000..a63bb0ba
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Main/SimpleAudioSample.inx
diff --git a/audio/simpleaudiosample/Source/Main/SimpleAudioSample.rc b/audio/simpleaudiosample/Source/Main/SimpleAudioSample.rc
new file mode 100644
index 00000000..7fbb4893
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Main/SimpleAudioSample.rc
@@ -0,0 +1,28 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    SimpleAudioSample.rc
+
+Abstract:
+
+--*/
+
+#include <windows.h>
+
+#include <ntverp.h>
+
+#define VER_FILETYPE                VFT_DRV
+#define VER_FILESUBTYPE             VFT2_DRV_SOUND
+#define VER_FILEDESCRIPTION_STR     "Microsoft Virtual Simple Audio Sample Driver"
+#define VER_INTERNALNAME_STR        "SimpleAudioSample.sys"
+#define VER_ORIGINALFILENAME_STR    "SimpleAudioSample.sys"
+
+#define VER_LEGALCOPYRIGHT_YEARS    "2013"
+#define VER_LEGALCOPYRIGHT_STR	    "Copyright (C) Microsoft Corp." VER_LEGALCOPYRIGHT_YEARS
+
+#include "common.ver"
+
+
diff --git a/audio/simpleaudiosample/Source/Main/adapter.cpp b/audio/simpleaudiosample/Source/Main/adapter.cpp
new file mode 100644
index 00000000..105f7fde
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Main/adapter.cpp
@@ -0,0 +1,844 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    adapter.cpp
+
+Abstract:
+
+    Setup and miniport installation.  No resources are used by simple audio sample.
+    This sample is to demonstrate how to develop a full featured audio miniport driver.
+--*/
+
+#pragma warning (disable : 4127)
+
+//
+// All the GUIDS for all the miniports end up in this object.
+//
+#define PUT_GUIDS_HERE
+
+#include "definitions.h"
+#include "endpoints.h"
+#include "minipairs.h"
+
+typedef void (*fnPcDriverUnload) (PDRIVER_OBJECT);
+fnPcDriverUnload gPCDriverUnloadRoutine = NULL;
+extern "C" DRIVER_UNLOAD DriverUnload;
+
+//-----------------------------------------------------------------------------
+// Referenced forward.
+//-----------------------------------------------------------------------------
+
+DRIVER_ADD_DEVICE AddDevice;
+
+NTSTATUS
+StartDevice
+( 
+    _In_  PDEVICE_OBJECT,      
+    _In_  PIRP,                
+    _In_  PRESOURCELIST        
+); 
+
+_Dispatch_type_(IRP_MJ_PNP)
+DRIVER_DISPATCH PnpHandler;
+
+//
+// Rendering streams are saved to a file by default. Use the registry value 
+// DoNotCreateDataFiles (DWORD) > 0 to override this default.
+//
+DWORD g_DoNotCreateDataFiles = 0;  // default is off.
+DWORD g_DisableToneGenerator = 0;  // default is to generate tones.
+UNICODE_STRING g_RegistryPath;      // This is used to store the registry settings path for the driver
+
+//-----------------------------------------------------------------------------
+// Functions
+//-----------------------------------------------------------------------------
+
+#pragma code_seg("PAGE")
+void ReleaseRegistryStringBuffer()
+{
+    if (g_RegistryPath.Buffer != NULL)
+    {
+        ExFreePool(g_RegistryPath.Buffer);
+        g_RegistryPath.Buffer = NULL;
+        g_RegistryPath.Length = 0;
+        g_RegistryPath.MaximumLength = 0;
+    }
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+extern "C"
+void DriverUnload 
+(
+    _In_ PDRIVER_OBJECT DriverObject
+)
+/*++
+
+Routine Description:
+
+  Our driver unload routine. This just frees the WDF driver object.
+
+Arguments:
+
+  DriverObject - pointer to the driver object
+
+Environment:
+
+    PASSIVE_LEVEL
+
+--*/
+{
+    PAGED_CODE(); 
+
+    DPF(D_TERSE, ("[DriverUnload]"));
+
+    ReleaseRegistryStringBuffer();
+
+    if (DriverObject == NULL)
+    {
+        goto Done;
+    }
+    
+    //
+    // Invoke first the port unload.
+    //
+    if (gPCDriverUnloadRoutine != NULL)
+    {
+        gPCDriverUnloadRoutine(DriverObject);
+    }
+
+    //
+    // Unload WDF driver object. 
+    //
+    if (WdfGetDriver() != NULL)
+    {
+        WdfDriverMiniportUnload(WdfGetDriver());
+    }
+Done:
+    return;
+}
+
+//=============================================================================
+#pragma code_seg("INIT")
+__drv_requiresIRQL(PASSIVE_LEVEL)
+NTSTATUS
+CopyRegistrySettingsPath(
+    _In_ PUNICODE_STRING RegistryPath
+)
+/*++
+
+Routine Description:
+
+Copies the following registry path to a global variable.
+
+\REGISTRY\MACHINE\SYSTEM\ControlSetxxx\Services\<driver>\Parameters
+
+Arguments:
+
+RegistryPath - Registry path passed to DriverEntry
+
+Returns:
+
+NTSTATUS - SUCCESS if able to configure the framework
+
+--*/
+
+{
+    // Initializing the unicode string, so that if it is not allocated it will not be deallocated too.
+    RtlInitUnicodeString(&g_RegistryPath, NULL);
+
+    g_RegistryPath.MaximumLength = RegistryPath->Length + sizeof(WCHAR);
+
+    g_RegistryPath.Buffer = (PWCH)ExAllocatePool2(POOL_FLAG_PAGED, g_RegistryPath.MaximumLength, MINADAPTER_POOLTAG);
+
+    if (g_RegistryPath.Buffer == NULL)
+    {
+        return STATUS_INSUFFICIENT_RESOURCES;
+    }
+
+    RtlAppendUnicodeToString(&g_RegistryPath, RegistryPath->Buffer);
+
+    return STATUS_SUCCESS;
+}
+
+//=============================================================================
+#pragma code_seg("INIT")
+__drv_requiresIRQL(PASSIVE_LEVEL)
+NTSTATUS
+GetRegistrySettings(
+    _In_ PUNICODE_STRING RegistryPath
+   )
+/*++
+
+Routine Description:
+
+    Initialize Driver Framework settings from the driver
+    specific registry settings under
+
+    \REGISTRY\MACHINE\SYSTEM\ControlSetxxx\Services\<driver>\Parameters
+
+Arguments:
+
+    RegistryPath - Registry path passed to DriverEntry
+
+Returns:
+
+    NTSTATUS - SUCCESS if able to configure the framework
+
+--*/
+
+{
+    NTSTATUS                    ntStatus;
+    UNICODE_STRING              parametersPath;
+    RTL_QUERY_REGISTRY_TABLE    paramTable[] = {
+    // QueryRoutine     Flags                                               Name                     EntryContext             DefaultType                                                    DefaultData              DefaultLength
+        { NULL,   RTL_QUERY_REGISTRY_DIRECT | RTL_QUERY_REGISTRY_TYPECHECK, L"DoNotCreateDataFiles", &g_DoNotCreateDataFiles, (REG_DWORD << RTL_QUERY_REGISTRY_TYPECHECK_SHIFT) | REG_DWORD, &g_DoNotCreateDataFiles, sizeof(ULONG)},
+        { NULL,   RTL_QUERY_REGISTRY_DIRECT | RTL_QUERY_REGISTRY_TYPECHECK, L"DisableToneGenerator", &g_DisableToneGenerator, (REG_DWORD << RTL_QUERY_REGISTRY_TYPECHECK_SHIFT) | REG_DWORD, &g_DisableToneGenerator, sizeof(ULONG)},
+        { NULL,   0,                                                        NULL,                    NULL,                    0,                                                             NULL,                    0}
+    };
+
+    DPF(D_TERSE, ("[GetRegistrySettings]"));
+
+    PAGED_CODE(); 
+
+    RtlInitUnicodeString(&parametersPath, NULL);
+
+    parametersPath.MaximumLength =
+        RegistryPath->Length + sizeof(L"\\Parameters") + sizeof(WCHAR);
+
+    parametersPath.Buffer = (PWCH) ExAllocatePool2(POOL_FLAG_PAGED, parametersPath.MaximumLength, MINADAPTER_POOLTAG);
+    if (parametersPath.Buffer == NULL) 
+    {
+        return STATUS_INSUFFICIENT_RESOURCES;
+    }
+
+    RtlAppendUnicodeToString(&parametersPath, RegistryPath->Buffer);
+    RtlAppendUnicodeToString(&parametersPath, L"\\Parameters");
+
+    ntStatus = RtlQueryRegistryValues(
+                 RTL_REGISTRY_ABSOLUTE | RTL_REGISTRY_OPTIONAL,
+                 parametersPath.Buffer,
+                 &paramTable[0],
+                 NULL,
+                 NULL
+                );
+
+    if (!NT_SUCCESS(ntStatus)) 
+    {
+        DPF(D_VERBOSE, ("RtlQueryRegistryValues failed, using default values, 0x%x", ntStatus));
+        //
+        // Don't return error because we will operate with default values.
+        //
+    }
+
+    //
+    // Dump settings.
+    //
+    DPF(D_VERBOSE, ("DoNotCreateDataFiles: %u", g_DoNotCreateDataFiles));
+    DPF(D_VERBOSE, ("DisableToneGenerator: %u", g_DisableToneGenerator));
+
+    //
+    // Cleanup.
+    //
+    ExFreePool(parametersPath.Buffer);
+
+    return STATUS_SUCCESS;
+}
+
+#pragma code_seg("INIT")
+extern "C" DRIVER_INITIALIZE DriverEntry;
+extern "C" NTSTATUS
+DriverEntry
+( 
+    _In_  PDRIVER_OBJECT          DriverObject,
+    _In_  PUNICODE_STRING         RegistryPathName
+)
+{
+/*++
+
+Routine Description:
+
+  Installable driver initialization entry point.
+  This entry point is called directly by the I/O system.
+
+  All audio adapter drivers can use this code without change.
+
+Arguments:
+
+  DriverObject - pointer to the driver object
+
+  RegistryPath - pointer to a unicode string representing the path,
+                   to driver-specific key in the registry.
+
+Return Value:
+
+  STATUS_SUCCESS if successful,
+  STATUS_UNSUCCESSFUL otherwise.
+
+--*/
+    NTSTATUS                    ntStatus;
+    WDF_DRIVER_CONFIG           config;
+
+    DPF(D_TERSE, ("[DriverEntry]"));
+
+    // Copy registry Path name in a global variable to be used by modules inside driver.
+    // !! NOTE !! Inside this function we are initializing the registrypath, so we MUST NOT add any failing calls
+    // before the following call.
+    ntStatus = CopyRegistrySettingsPath(RegistryPathName);
+    IF_FAILED_ACTION_JUMP(
+        ntStatus,
+        DPF(D_ERROR, ("Registry path copy error 0x%x", ntStatus)),
+        Done);
+
+    //
+    // Get registry configuration.
+    //
+    ntStatus = GetRegistrySettings(RegistryPathName);
+    IF_FAILED_ACTION_JUMP(
+        ntStatus,
+        DPF(D_ERROR, ("Registry Configuration error 0x%x", ntStatus)),
+        Done);
+    
+    WDF_DRIVER_CONFIG_INIT(&config, WDF_NO_EVENT_CALLBACK);
+    //
+    // Set WdfDriverInitNoDispatchOverride flag to tell the framework
+    // not to provide dispatch routines for the driver. In other words,
+    // the framework must not intercept IRPs that the I/O manager has
+    // directed to the driver. In this case, they will be handled by Audio
+    // port driver.
+    //
+    config.DriverInitFlags |= WdfDriverInitNoDispatchOverride;
+    config.DriverPoolTag    = MINADAPTER_POOLTAG;
+
+    ntStatus = WdfDriverCreate(DriverObject,
+                               RegistryPathName,
+                               WDF_NO_OBJECT_ATTRIBUTES,
+                               &config,
+                               WDF_NO_HANDLE);
+    IF_FAILED_ACTION_JUMP(
+        ntStatus,
+        DPF(D_ERROR, ("WdfDriverCreate failed, 0x%x", ntStatus)),
+        Done);
+
+    //
+    // Tell the class driver to initialize the driver.
+    //
+    ntStatus =  PcInitializeAdapterDriver(DriverObject,
+                                          RegistryPathName,
+                                          (PDRIVER_ADD_DEVICE)AddDevice);
+    IF_FAILED_ACTION_JUMP(
+        ntStatus,
+        DPF(D_ERROR, ("PcInitializeAdapterDriver failed, 0x%x", ntStatus)),
+        Done);
+
+    //
+    // To intercept stop/remove/surprise-remove.
+    //
+    DriverObject->MajorFunction[IRP_MJ_PNP] = PnpHandler;
+
+    //
+    // Hook the port class unload function
+    //
+    gPCDriverUnloadRoutine = DriverObject->DriverUnload;
+    DriverObject->DriverUnload = DriverUnload;
+
+    //
+    // All done.
+    //
+    ntStatus = STATUS_SUCCESS;
+    
+Done:
+
+    if (!NT_SUCCESS(ntStatus))
+    {
+        if (WdfGetDriver() != NULL)
+        {
+            WdfDriverMiniportUnload(WdfGetDriver());
+        }
+
+        ReleaseRegistryStringBuffer();
+    }
+    
+    return ntStatus;
+} // DriverEntry
+
+#pragma code_seg()
+// disable prefast warning 28152 because 
+// DO_DEVICE_INITIALIZING is cleared in PcAddAdapterDevice
+#pragma warning(disable:28152)
+#pragma code_seg("PAGE")
+//=============================================================================
+NTSTATUS AddDevice
+( 
+    _In_  PDRIVER_OBJECT    DriverObject,
+    _In_  PDEVICE_OBJECT    PhysicalDeviceObject 
+)
+/*++
+
+Routine Description:
+
+  The Plug & Play subsystem is handing us a brand new PDO, for which we
+  (by means of INF registration) have been asked to provide a driver.
+
+  We need to determine if we need to be in the driver stack for the device.
+  Create a function device object to attach to the stack
+  Initialize that device object
+  Return status success.
+
+  All audio adapter drivers can use this code without change.
+
+Arguments:
+
+  DriverObject - pointer to a driver object
+
+  PhysicalDeviceObject -  pointer to a device object created by the
+                            underlying bus driver.
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    NTSTATUS        ntStatus;
+    ULONG           maxObjects;
+
+    DPF(D_TERSE, ("[AddDevice]"));
+
+    maxObjects = g_MaxMiniports;
+
+    // Tell the class driver to add the device.
+    //
+    ntStatus = 
+        PcAddAdapterDevice
+        ( 
+            DriverObject,
+            PhysicalDeviceObject,
+            PCPFNSTARTDEVICE(StartDevice),
+            maxObjects,
+            0
+        );
+
+    return ntStatus;
+} // AddDevice
+
+#pragma code_seg()
+NTSTATUS
+_IRQL_requires_max_(DISPATCH_LEVEL)
+PowerControlCallback
+(
+    _In_        LPCGUID PowerControlCode,
+    _In_opt_    PVOID   InBuffer,
+    _In_        SIZE_T  InBufferSize,
+    _Out_writes_bytes_to_(OutBufferSize, *BytesReturned) PVOID OutBuffer,
+    _In_        SIZE_T  OutBufferSize,
+    _Out_opt_   PSIZE_T BytesReturned,
+    _In_opt_    PVOID   Context
+)
+{
+    UNREFERENCED_PARAMETER(PowerControlCode);
+    UNREFERENCED_PARAMETER(InBuffer);
+    UNREFERENCED_PARAMETER(InBufferSize);
+    UNREFERENCED_PARAMETER(OutBuffer);
+    UNREFERENCED_PARAMETER(OutBufferSize);
+    UNREFERENCED_PARAMETER(BytesReturned);
+    UNREFERENCED_PARAMETER(Context);
+    
+    return STATUS_NOT_IMPLEMENTED;
+}
+
+#pragma code_seg("PAGE")
+NTSTATUS 
+InstallEndpointRenderFilters(
+    _In_ PDEVICE_OBJECT     _pDeviceObject, 
+    _In_ PIRP               _pIrp, 
+    _In_ PADAPTERCOMMON     _pAdapterCommon,
+    _In_ PENDPOINT_MINIPAIR _pAeMiniports
+    )
+{
+    NTSTATUS                    ntStatus                = STATUS_SUCCESS;
+    PUNKNOWN                    unknownTopology         = NULL;
+    PUNKNOWN                    unknownWave             = NULL;
+    PPORTCLSETWHELPER           pPortClsEtwHelper       = NULL;
+#ifdef _USE_IPortClsRuntimePower
+    PPORTCLSRUNTIMEPOWER        pPortClsRuntimePower    = NULL;
+#endif // _USE_IPortClsRuntimePower
+    PPORTCLSStreamResourceManager pPortClsResMgr        = NULL;
+    PPORTCLSStreamResourceManager2 pPortClsResMgr2      = NULL;
+
+    PAGED_CODE();
+    
+    UNREFERENCED_PARAMETER(_pDeviceObject);
+
+    ntStatus = _pAdapterCommon->InstallEndpointFilters(
+        _pIrp,
+        _pAeMiniports,
+        NULL,
+        &unknownTopology,
+        &unknownWave,
+        NULL, NULL);
+
+    if (unknownWave) // IID_IPortClsEtwHelper and IID_IPortClsRuntimePower interfaces are only exposed on the WaveRT port.
+    {
+        ntStatus = unknownWave->QueryInterface (IID_IPortClsEtwHelper, (PVOID *)&pPortClsEtwHelper);
+        if (NT_SUCCESS(ntStatus))
+        {
+            _pAdapterCommon->SetEtwHelper(pPortClsEtwHelper);
+            ASSERT(pPortClsEtwHelper != NULL);
+            pPortClsEtwHelper->Release();
+        }
+
+#ifdef _USE_IPortClsRuntimePower
+        // Let's get the runtime power interface on PortCls.  
+        ntStatus = unknownWave->QueryInterface(IID_IPortClsRuntimePower, (PVOID *)&pPortClsRuntimePower);
+        if (NT_SUCCESS(ntStatus))
+        {
+            // This interface would typically be stashed away for later use.  Instead,
+            // let's just send an empty control with GUID_NULL.
+            NTSTATUS ntStatusTest =
+                pPortClsRuntimePower->SendPowerControl
+                (
+                    _pDeviceObject,
+                    &GUID_NULL,
+                    NULL,
+                    0,
+                    NULL,
+                    0,
+                    NULL
+                );
+
+            if (NT_SUCCESS(ntStatusTest) || STATUS_NOT_IMPLEMENTED == ntStatusTest || STATUS_NOT_SUPPORTED == ntStatusTest)
+            {
+                ntStatus = pPortClsRuntimePower->RegisterPowerControlCallback(_pDeviceObject, &PowerControlCallback, NULL);
+                if (NT_SUCCESS(ntStatus))
+                {
+                    ntStatus = pPortClsRuntimePower->UnregisterPowerControlCallback(_pDeviceObject);
+                }
+            }
+            else
+            {
+                ntStatus = ntStatusTest;
+            }
+
+            pPortClsRuntimePower->Release();
+        }
+#endif // _USE_IPortClsRuntimePower
+
+        //
+        // Test: add and remove current thread as streaming audio resource.  
+        // In a real driver you should only add interrupts and driver-owned threads 
+        // (i.e., do NOT add the current thread as streaming resource).
+        //
+        // testing IPortClsStreamResourceManager:
+        ntStatus = unknownWave->QueryInterface(IID_IPortClsStreamResourceManager, (PVOID *)&pPortClsResMgr);
+        if (NT_SUCCESS(ntStatus))
+        {
+            PCSTREAMRESOURCE_DESCRIPTOR res;
+            PCSTREAMRESOURCE hRes = NULL;
+            PDEVICE_OBJECT pdo = NULL;
+
+            PcGetPhysicalDeviceObject(_pDeviceObject, &pdo);
+            PCSTREAMRESOURCE_DESCRIPTOR_INIT(&res);
+            res.Pdo = pdo;
+            res.Type = ePcStreamResourceThread;
+            res.Resource.Thread = PsGetCurrentThread();
+            
+            NTSTATUS ntStatusTest = pPortClsResMgr->AddStreamResource(NULL, &res, &hRes);
+            if (NT_SUCCESS(ntStatusTest))
+            {
+                pPortClsResMgr->RemoveStreamResource(hRes);
+                hRes = NULL;
+            }
+
+            pPortClsResMgr->Release();
+            pPortClsResMgr = NULL;
+        }
+        
+        // testing IPortClsStreamResourceManager2:
+        ntStatus = unknownWave->QueryInterface(IID_IPortClsStreamResourceManager2, (PVOID *)&pPortClsResMgr2);
+        if (NT_SUCCESS(ntStatus))
+        {
+            PCSTREAMRESOURCE_DESCRIPTOR res;
+            PCSTREAMRESOURCE hRes = NULL;
+            PDEVICE_OBJECT pdo = NULL;
+
+            PcGetPhysicalDeviceObject(_pDeviceObject, &pdo);
+            PCSTREAMRESOURCE_DESCRIPTOR_INIT(&res);
+            res.Pdo = pdo;
+            res.Type = ePcStreamResourceThread;
+            res.Resource.Thread = PsGetCurrentThread();
+            
+            NTSTATUS ntStatusTest = pPortClsResMgr2->AddStreamResource2(pdo, NULL, &res, &hRes);
+            if (NT_SUCCESS(ntStatusTest))
+            {
+                pPortClsResMgr2->RemoveStreamResource(hRes);
+                hRes = NULL;
+            }
+
+            pPortClsResMgr2->Release();
+            pPortClsResMgr2 = NULL;
+        }
+    }
+
+    SAFE_RELEASE(unknownTopology);
+    SAFE_RELEASE(unknownWave);
+
+    return ntStatus;
+}
+
+#pragma code_seg("PAGE")
+NTSTATUS 
+InstallAllRenderFilters(
+    _In_ PDEVICE_OBJECT _pDeviceObject, 
+    _In_ PIRP           _pIrp, 
+    _In_ PADAPTERCOMMON _pAdapterCommon
+    )
+{
+    NTSTATUS            ntStatus;
+    PENDPOINT_MINIPAIR* ppAeMiniports   = g_RenderEndpoints;
+    
+    PAGED_CODE();
+
+    for(ULONG i = 0; i < g_cRenderEndpoints; ++i, ++ppAeMiniports)
+    {
+        ntStatus = InstallEndpointRenderFilters(_pDeviceObject, _pIrp, _pAdapterCommon, *ppAeMiniports);
+        IF_FAILED_JUMP(ntStatus, Exit);
+    }
+    
+    ntStatus = STATUS_SUCCESS;
+
+Exit:
+    return ntStatus;
+}
+
+#pragma code_seg("PAGE")
+NTSTATUS
+InstallEndpointCaptureFilters(
+    _In_ PDEVICE_OBJECT     _pDeviceObject,
+    _In_ PIRP               _pIrp,
+    _In_ PADAPTERCOMMON     _pAdapterCommon,
+    _In_ PENDPOINT_MINIPAIR _pAeMiniports
+)
+{
+    NTSTATUS    ntStatus = STATUS_SUCCESS;
+
+    PAGED_CODE();
+
+    UNREFERENCED_PARAMETER(_pDeviceObject);
+
+    ntStatus = _pAdapterCommon->InstallEndpointFilters(
+        _pIrp,
+        _pAeMiniports,
+        NULL,
+        NULL,
+        NULL,
+        NULL, NULL);
+
+    return ntStatus;
+}
+
+#pragma code_seg("PAGE")
+NTSTATUS
+InstallAllCaptureFilters(
+    _In_ PDEVICE_OBJECT _pDeviceObject,
+    _In_ PIRP           _pIrp,
+    _In_ PADAPTERCOMMON _pAdapterCommon
+)
+{
+    NTSTATUS            ntStatus;
+    PENDPOINT_MINIPAIR* ppAeMiniports = g_CaptureEndpoints;
+
+    PAGED_CODE();
+
+    for (ULONG i = 0; i < g_cCaptureEndpoints; ++i, ++ppAeMiniports)
+    {
+        ntStatus = InstallEndpointCaptureFilters(_pDeviceObject, _pIrp, _pAdapterCommon, *ppAeMiniports);
+        IF_FAILED_JUMP(ntStatus, Exit);
+    }
+
+    ntStatus = STATUS_SUCCESS;
+
+Exit:
+    return ntStatus;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+StartDevice
+( 
+    _In_  PDEVICE_OBJECT          DeviceObject,     
+    _In_  PIRP                    Irp,              
+    _In_  PRESOURCELIST           ResourceList      
+)  
+{
+/*++
+
+Routine Description:
+
+  This function is called by the operating system when the device is 
+  started.
+  It is responsible for starting the miniports.  This code is specific to    
+  the adapter because it calls out miniports for functions that are specific 
+  to the adapter.                                                            
+
+Arguments:
+
+  DeviceObject - pointer to the driver object
+
+  Irp - pointer to the irp 
+
+  ResourceList - pointer to the resource list assigned by PnP manager
+
+Return Value:
+
+  NT status code.
+
+--*/
+    UNREFERENCED_PARAMETER(ResourceList);
+
+    PAGED_CODE();
+
+    ASSERT(DeviceObject);
+    ASSERT(Irp);
+    ASSERT(ResourceList);
+
+    NTSTATUS                    ntStatus        = STATUS_SUCCESS;
+
+    PADAPTERCOMMON              pAdapterCommon  = NULL;
+    PUNKNOWN                    pUnknownCommon  = NULL;
+    PortClassDeviceContext*     pExtension      = static_cast<PortClassDeviceContext*>(DeviceObject->DeviceExtension);
+
+    DPF_ENTER(("[StartDevice]"));
+
+    //
+    // create a new adapter common object
+    //
+    ntStatus = NewAdapterCommon( 
+                                &pUnknownCommon,
+                                IID_IAdapterCommon,
+                                NULL,
+                                POOL_FLAG_NON_PAGED 
+                                );
+    IF_FAILED_JUMP(ntStatus, Exit);
+
+    ntStatus = pUnknownCommon->QueryInterface( IID_IAdapterCommon,(PVOID *) &pAdapterCommon);
+    IF_FAILED_JUMP(ntStatus, Exit);
+
+    ntStatus = pAdapterCommon->Init(DeviceObject);
+    IF_FAILED_JUMP(ntStatus, Exit);
+
+    //
+    // register with PortCls for power-management services
+    ntStatus = PcRegisterAdapterPowerManagement( PUNKNOWN(pAdapterCommon), DeviceObject);
+    IF_FAILED_JUMP(ntStatus, Exit);
+
+    //
+    // Install wave+topology filters for render devices
+    //
+    ntStatus = InstallAllRenderFilters(DeviceObject, Irp, pAdapterCommon);
+    IF_FAILED_JUMP(ntStatus, Exit);
+
+    //
+    // Install wave+topology filters for capture devices
+    //
+    ntStatus = InstallAllCaptureFilters(DeviceObject, Irp, pAdapterCommon);
+    IF_FAILED_JUMP(ntStatus, Exit);
+
+Exit:
+
+    //
+    // Stash the adapter common object in the device extension so
+    // we can access it for cleanup on stop/removal.
+    //
+    if (pAdapterCommon)
+    {
+        ASSERT(pExtension != NULL);
+        pExtension->m_pCommon = pAdapterCommon;
+    }
+
+    //
+    // Release the adapter IUnknown interface.
+    //
+    SAFE_RELEASE(pUnknownCommon);
+    
+    return ntStatus;
+} // StartDevice
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS 
+PnpHandler
+(
+    _In_ DEVICE_OBJECT *_DeviceObject, 
+    _Inout_ IRP *_Irp
+)
+/*++
+
+Routine Description:
+
+  Handles PnP IRPs                                                           
+
+Arguments:
+
+  _DeviceObject - Functional Device object pointer.
+
+  _Irp - The Irp being passed
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    NTSTATUS                ntStatus = STATUS_UNSUCCESSFUL;
+    IO_STACK_LOCATION      *stack;
+    PortClassDeviceContext *ext;
+
+    // Documented https://msdn.microsoft.com/en-us/library/windows/hardware/ff544039(v=vs.85).aspx
+    // This method will be called in IRQL PASSIVE_LEVEL
+#pragma warning(suppress: 28118)
+    PAGED_CODE(); 
+
+    ASSERT(_DeviceObject);
+    ASSERT(_Irp);
+
+    //
+    // Check for the REMOVE_DEVICE irp.  If we're being unloaded, 
+    // uninstantiate our devices and release the adapter common
+    // object.
+    //
+    stack = IoGetCurrentIrpStackLocation(_Irp);
+
+    switch (stack->MinorFunction)
+    {
+    case IRP_MN_REMOVE_DEVICE:
+    case IRP_MN_SURPRISE_REMOVAL:
+    case IRP_MN_STOP_DEVICE:
+        ext = static_cast<PortClassDeviceContext*>(_DeviceObject->DeviceExtension);
+
+        if (ext->m_pCommon != NULL)
+        {
+            ext->m_pCommon->Cleanup();
+            
+            ext->m_pCommon->Release();
+            ext->m_pCommon = NULL;
+        }
+        break;
+
+    default:
+        break;
+    }
+    
+    ntStatus = PcDispatchIrp(_DeviceObject, _Irp);
+
+    return ntStatus;
+}
+
+#pragma code_seg()
+
diff --git a/audio/simpleaudiosample/Source/Main/basetopo.cpp b/audio/simpleaudiosample/Source/Main/basetopo.cpp
new file mode 100644
index 00000000..b29a9bb1
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Main/basetopo.cpp
@@ -0,0 +1,688 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    basetopo.cpp
+
+Abstract:
+
+    Implementation of topology miniport. This the base class for 
+    all simple audio sample drivers
+--*/
+
+//4127: conditional expression is constant
+#pragma warning (disable : 4127)
+
+#include "definitions.h"
+#include "basetopo.h"
+
+//=============================================================================
+#pragma code_seg("PAGE")
+CMiniportTopologySimpleAudioSample::CMiniportTopologySimpleAudioSample
+(
+    _In_        PCFILTER_DESCRIPTOR    *FilterDesc,
+    _In_        USHORT                  DeviceMaxChannels
+)
+/*++
+
+Routine Description:
+
+  Topology miniport constructor
+
+Arguments:
+
+  FilterDesc - 
+
+  DeviceMaxChannels - 
+
+Return Value:
+
+  void
+
+--*/
+{
+    PAGED_CODE();
+
+    DPF_ENTER(("[%s]",__FUNCTION__));
+
+    m_AdapterCommon     = NULL;
+
+    ASSERT(FilterDesc != NULL);
+    m_FilterDescriptor  = FilterDesc;
+    m_PortEvents        = NULL;
+    
+    ASSERT(DeviceMaxChannels > 0);
+    m_DeviceMaxChannels = DeviceMaxChannels;
+} // CMiniportTopologySimpleAudioSample
+
+CMiniportTopologySimpleAudioSample::~CMiniportTopologySimpleAudioSample
+(
+    void
+)
+/*++
+
+Routine Description:
+
+  Topology miniport destructor
+
+Arguments:
+
+Return Value:
+
+  void
+
+--*/
+{
+    PAGED_CODE();
+
+    DPF_ENTER(("[%s]",__FUNCTION__));
+
+    SAFE_RELEASE(m_AdapterCommon);
+    SAFE_RELEASE(m_PortEvents);
+} // ~CMiniportTopologySimpleAudioSample
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+CMiniportTopologySimpleAudioSample::DataRangeIntersection
+( 
+    _In_  ULONG                 PinId,
+    _In_  PKSDATARANGE          ClientDataRange,
+    _In_  PKSDATARANGE          MyDataRange,
+    _In_  ULONG                 OutputBufferLength,
+    _Out_writes_bytes_to_opt_(OutputBufferLength, *ResultantFormatLength)
+          PVOID                 ResultantFormat     OPTIONAL,
+    _Out_ PULONG                ResultantFormatLength 
+)
+/*++
+
+Routine Description:
+
+  The DataRangeIntersection function determines the highest 
+  quality intersection of two data ranges. Topology miniport does nothing.
+
+Arguments:
+
+  PinId - Pin for which data intersection is being determined. 
+
+  ClientDataRange - Pointer to KSDATARANGE structure which contains the data range 
+                    submitted by client in the data range intersection property 
+                    request
+
+  MyDataRange - Pin's data range to be compared with client's data range
+
+  OutputBufferLength - Size of the buffer pointed to by the resultant format 
+                       parameter
+
+  ResultantFormat - Pointer to value where the resultant format should be 
+                    returned
+
+  ResultantFormatLength - Actual length of the resultant format that is placed 
+                          at ResultantFormat. This should be less than or equal 
+                          to OutputBufferLength
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    UNREFERENCED_PARAMETER(PinId);
+    UNREFERENCED_PARAMETER(ClientDataRange);
+    UNREFERENCED_PARAMETER(MyDataRange);
+    UNREFERENCED_PARAMETER(OutputBufferLength);
+    UNREFERENCED_PARAMETER(ResultantFormat);
+    UNREFERENCED_PARAMETER(ResultantFormatLength);
+
+    PAGED_CODE();
+
+    DPF_ENTER(("[%s]",__FUNCTION__));
+
+    return (STATUS_NOT_IMPLEMENTED);
+} // DataRangeIntersection
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+CMiniportTopologySimpleAudioSample::GetDescription
+( 
+    _Out_ PPCFILTER_DESCRIPTOR *  OutFilterDescriptor 
+)
+/*++
+
+Routine Description:
+
+  The GetDescription function gets a pointer to a filter description. 
+  It provides a location to deposit a pointer in miniport's description 
+  structure. This is the placeholder for the FromNode or ToNode fields in 
+  connections which describe connections to the filter's pins
+
+Arguments:
+
+  OutFilterDescriptor - Pointer to the filter description. 
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    ASSERT(OutFilterDescriptor);
+
+    DPF_ENTER(("[%s]",__FUNCTION__));
+
+    *OutFilterDescriptor = m_FilterDescriptor;
+
+    return (STATUS_SUCCESS);
+} // GetDescription
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+CMiniportTopologySimpleAudioSample::Init
+( 
+    _In_  PUNKNOWN          UnknownAdapter_,
+    _In_  PPORTTOPOLOGY     Port_ 
+)
+/*++
+
+Routine Description:
+
+  Initializes the topology miniport.
+
+Arguments:
+
+  UnknownAdapter -
+
+  Port_ - Pointer to topology port
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+    
+    ASSERT(UnknownAdapter_);
+    ASSERT(Port_);
+
+    DPF_ENTER(("[CMiniportTopologySimpleAudioSample::Init]"));
+
+    NTSTATUS    ntStatus;
+
+    ntStatus = 
+        UnknownAdapter_->QueryInterface( 
+            IID_IAdapterCommon,
+            (PVOID *) &m_AdapterCommon);
+    
+    if (NT_SUCCESS(ntStatus))
+    {
+        //
+        // Get the port event interface.
+        //
+        ntStatus = Port_->QueryInterface(
+            IID_IPortEvents, 
+            (PVOID *)&m_PortEvents);
+    }
+
+    if (NT_SUCCESS(ntStatus))
+    {
+        m_AdapterCommon->MixerReset();
+    }
+
+    if (!NT_SUCCESS(ntStatus))
+    {
+        // clean up AdapterCommon
+        SAFE_RELEASE(m_AdapterCommon);
+        SAFE_RELEASE(m_PortEvents);
+    }
+
+    return ntStatus;
+} // Init
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS                            
+CMiniportTopologySimpleAudioSample::PropertyHandlerGeneric
+(
+    _In_  PPCPROPERTY_REQUEST     PropertyRequest
+)
+/*++
+
+Routine Description:
+
+  Handles all properties for this miniport.
+
+Arguments:
+
+  PropertyRequest - property request structure
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    NTSTATUS                    ntStatus = STATUS_INVALID_DEVICE_REQUEST;
+
+    switch (PropertyRequest->PropertyItem->Id)
+    {
+        case KSPROPERTY_AUDIO_VOLUMELEVEL:
+            ntStatus = PropertyHandler_Volume(
+                                m_AdapterCommon,
+                                PropertyRequest,
+                                m_DeviceMaxChannels);
+            break;
+        
+        case KSPROPERTY_AUDIO_MUTE:
+            ntStatus = PropertyHandler_Mute(
+                                m_AdapterCommon,
+                                PropertyRequest,
+                                m_DeviceMaxChannels);
+            break;
+
+        case KSPROPERTY_AUDIO_PEAKMETER2:
+            ntStatus = PropertyHandler_PeakMeter2(
+                                m_AdapterCommon,
+                                PropertyRequest,
+                                m_DeviceMaxChannels);
+            break;
+
+        case KSPROPERTY_AUDIO_CPU_RESOURCES:
+            ntStatus = PropertyHandler_CpuResources(PropertyRequest);
+            break;
+
+        case KSPROPERTY_AUDIO_MUX_SOURCE:
+            ntStatus = PropertyHandlerMuxSource(PropertyRequest);
+            break;
+
+        case KSPROPERTY_AUDIO_DEV_SPECIFIC:
+            ntStatus = PropertyHandlerDevSpecific(PropertyRequest);
+            break;
+
+        default:
+            DPF(D_TERSE, ("[PropertyHandlerGeneric: Invalid Device Request]"));
+    }
+
+    return ntStatus;
+} // PropertyHandlerGeneric
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS                            
+CMiniportTopologySimpleAudioSample::PropertyHandlerMuxSource
+(
+    _In_  PPCPROPERTY_REQUEST     PropertyRequest
+)
+/*++
+
+Routine Description:
+
+  PropertyHandler for KSPROPERTY_AUDIO_MUX_SOURCE.
+
+Arguments:
+
+  PropertyRequest - property request structure
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    DPF_ENTER(("[%s]",__FUNCTION__));
+
+    NTSTATUS                    ntStatus = STATUS_INVALID_DEVICE_REQUEST;
+
+    //
+    // Validate node
+    // This property is only valid for WAVEIN_MUX node.
+    //
+    // TODO if (WAVEIN_MUX == PropertyRequest->Node)
+    {
+        if (PropertyRequest->ValueSize >= sizeof(ULONG))
+        {
+            PULONG pulMuxValue = PULONG(PropertyRequest->Value);
+            
+            if (PropertyRequest->Verb & KSPROPERTY_TYPE_GET)
+            {
+                *pulMuxValue = m_AdapterCommon->MixerMuxRead();
+                PropertyRequest->ValueSize = sizeof(ULONG);
+                ntStatus = STATUS_SUCCESS;
+            }
+            else if (PropertyRequest->Verb & KSPROPERTY_TYPE_SET)
+            {
+                m_AdapterCommon->MixerMuxWrite(*pulMuxValue);
+                ntStatus = STATUS_SUCCESS;
+            }
+            else if (PropertyRequest->Verb & KSPROPERTY_TYPE_BASICSUPPORT)
+            {
+                ntStatus = 
+                    PropertyHandler_BasicSupport
+                    ( 
+                        PropertyRequest, 
+                        KSPROPERTY_TYPE_ALL,
+                        VT_I4
+                    );
+            }
+        }
+        else
+        {
+            DPF(D_TERSE, ("[PropertyHandlerMuxSource - Invalid parameter]"));
+            ntStatus = STATUS_INVALID_PARAMETER;
+        }
+    }
+
+    return ntStatus;
+} // PropertyHandlerMuxSource
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS                            
+CMiniportTopologySimpleAudioSample::PropertyHandlerDevSpecific(
+    _In_  PPCPROPERTY_REQUEST     PropertyRequest
+)
+/*++
+
+Routine Description:
+
+  Property handler for KSPROPERTY_AUDIO_DEV_SPECIFIC
+
+Arguments:
+
+  PropertyRequest - property request structure
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    DPF_ENTER(("[%s]",__FUNCTION__));
+
+    NTSTATUS ntStatus=STATUS_SUCCESS;
+
+    if (PropertyRequest->Verb & KSPROPERTY_TYPE_BASICSUPPORT)
+    {
+        if( DEV_SPECIFIC_VT_BOOL == PropertyRequest->Node )
+        {
+            ntStatus = PropertyHandler_BasicSupport(PropertyRequest,KSPROPERTY_TYPE_ALL,VT_BOOL);
+        }
+        else
+        {
+            ULONG ExpectedSize = sizeof( KSPROPERTY_DESCRIPTION ) + 
+                                 sizeof( KSPROPERTY_MEMBERSHEADER ) + 
+                                 sizeof( KSPROPERTY_BOUNDS_LONG );
+            DWORD ulPropTypeSetId;
+
+            if( DEV_SPECIFIC_VT_I4 == PropertyRequest->Node )
+            {
+                ulPropTypeSetId = VT_I4;
+            }
+            else if ( DEV_SPECIFIC_VT_UI4 == PropertyRequest->Node )
+            {
+                ulPropTypeSetId = VT_UI4;
+            }
+            else
+            {
+                ulPropTypeSetId = VT_ILLEGAL;
+                ntStatus = STATUS_INVALID_PARAMETER;
+            }
+
+            if( NT_SUCCESS(ntStatus))
+            {
+                if ( !PropertyRequest->ValueSize )
+                {
+                    PropertyRequest->ValueSize = ExpectedSize;
+                    ntStatus = STATUS_BUFFER_OVERFLOW;
+                } 
+                else if (PropertyRequest->ValueSize >= sizeof(KSPROPERTY_DESCRIPTION))
+                {
+                    // if return buffer can hold a KSPROPERTY_DESCRIPTION, return it
+                    //
+                    PKSPROPERTY_DESCRIPTION PropDesc = PKSPROPERTY_DESCRIPTION(PropertyRequest->Value);
+
+                    PropDesc->AccessFlags       = KSPROPERTY_TYPE_ALL;
+                    PropDesc->DescriptionSize   = ExpectedSize;
+                    PropDesc->PropTypeSet.Set   = KSPROPTYPESETID_General;
+                    PropDesc->PropTypeSet.Id    = ulPropTypeSetId;
+                    PropDesc->PropTypeSet.Flags = 0;
+                    PropDesc->MembersListCount  = 0;
+                    PropDesc->Reserved          = 0;
+
+                    if ( PropertyRequest->ValueSize >= ExpectedSize )
+                    {
+                        // Extra information to return
+                        PropDesc->MembersListCount  = 1;
+
+                        PKSPROPERTY_MEMBERSHEADER MembersHeader = ( PKSPROPERTY_MEMBERSHEADER )( PropDesc + 1);
+                        MembersHeader->MembersFlags = KSPROPERTY_MEMBER_RANGES;
+                        MembersHeader->MembersCount  = 1;
+                        MembersHeader->MembersSize   = sizeof( KSPROPERTY_BOUNDS_LONG );
+                        MembersHeader->Flags = 0;
+
+                        PKSPROPERTY_BOUNDS_LONG PeakMeterBounds = (PKSPROPERTY_BOUNDS_LONG)( MembersHeader + 1);
+                        if(VT_I4 == ulPropTypeSetId )
+                        {
+                            PeakMeterBounds->SignedMinimum = 0;
+                            PeakMeterBounds->SignedMaximum = 0x7fffffff;
+                        }
+                        else
+                        {
+                            PeakMeterBounds->UnsignedMinimum = 0;
+                            PeakMeterBounds->UnsignedMaximum = 0xffffffff;
+                        }
+
+                        // set the return value size
+                        PropertyRequest->ValueSize = ExpectedSize;
+                    }
+                    else
+                    {
+                        // No extra information to return.
+                        PropertyRequest->ValueSize = sizeof(KSPROPERTY_DESCRIPTION);
+                    }
+
+                    ntStatus = STATUS_SUCCESS;
+                } 
+                else if (PropertyRequest->ValueSize >= sizeof(ULONG))
+                {
+                    // if return buffer can hold a ULONG, return the access flags
+                    //
+                    *(PULONG(PropertyRequest->Value)) = KSPROPERTY_TYPE_ALL;
+
+                    PropertyRequest->ValueSize = sizeof(ULONG);
+                    ntStatus = STATUS_SUCCESS;                    
+                }
+                else
+                {
+                    PropertyRequest->ValueSize = 0;
+                    ntStatus = STATUS_BUFFER_TOO_SMALL;
+                }
+            }
+        }
+    }
+    else
+    {
+        // switch on node id
+        switch( PropertyRequest->Node )
+        {
+        case DEV_SPECIFIC_VT_BOOL:
+            {
+                PBOOL pbDevSpecific;
+
+                ntStatus = ValidatePropertyParams(PropertyRequest, sizeof(BOOL), 0);
+
+                if (NT_SUCCESS(ntStatus))
+                {
+                    pbDevSpecific   = PBOOL (PropertyRequest->Value);
+
+                    if (PropertyRequest->Verb & KSPROPERTY_TYPE_GET)
+                    {
+                        *pbDevSpecific = m_AdapterCommon->bDevSpecificRead();
+                        PropertyRequest->ValueSize = sizeof(BOOL);
+                    }
+                    else if (PropertyRequest->Verb & KSPROPERTY_TYPE_SET)
+                    {
+                        m_AdapterCommon->bDevSpecificWrite(*pbDevSpecific);
+                    }
+                    else
+                    {
+                        ntStatus = STATUS_INVALID_PARAMETER;
+                    }
+                }
+            }
+            break;
+        case DEV_SPECIFIC_VT_I4:
+            {
+                INT* piDevSpecific;
+
+                ntStatus = ValidatePropertyParams(PropertyRequest, sizeof(int), 0);
+
+                if (NT_SUCCESS(ntStatus))
+                {
+                    piDevSpecific   = PINT (PropertyRequest->Value);
+
+                    if (PropertyRequest->Verb & KSPROPERTY_TYPE_GET)
+                    {
+                        *piDevSpecific = m_AdapterCommon->iDevSpecificRead();
+                        PropertyRequest->ValueSize = sizeof(int);
+                    }
+                    else if (PropertyRequest->Verb & KSPROPERTY_TYPE_SET)
+                    {
+                        m_AdapterCommon->iDevSpecificWrite(*piDevSpecific);
+                    }
+                    else
+                    {
+                        ntStatus = STATUS_INVALID_PARAMETER;
+                    }
+                }
+            }
+            break;
+        case DEV_SPECIFIC_VT_UI4:
+            {
+                UINT* puiDevSpecific;
+
+                ntStatus = ValidatePropertyParams(PropertyRequest, sizeof(UINT), 0);
+
+                if (NT_SUCCESS(ntStatus))
+                {
+                    puiDevSpecific   = PUINT (PropertyRequest->Value);
+
+                    if (PropertyRequest->Verb & KSPROPERTY_TYPE_GET)
+                    {
+                        *puiDevSpecific = m_AdapterCommon->uiDevSpecificRead();
+                        PropertyRequest->ValueSize = sizeof(UINT);
+                    }
+                    else if (PropertyRequest->Verb & KSPROPERTY_TYPE_SET)
+                    {
+                        m_AdapterCommon->uiDevSpecificWrite(*puiDevSpecific);
+                    }
+                    else
+                    {
+                        ntStatus = STATUS_INVALID_PARAMETER;
+                    }
+                }
+            }
+            break;
+        default:
+            ntStatus = STATUS_INVALID_PARAMETER;
+            break;
+        }
+
+
+        if( !NT_SUCCESS(ntStatus))
+        {
+            DPF(D_TERSE, ("[%s - ntStatus=0x%08x]",__FUNCTION__,ntStatus));
+        }
+    }
+
+    return ntStatus;
+} // PropertyHandlerDevSpecific
+
+//=============================================================================
+#pragma code_seg("PAGE")
+VOID
+CMiniportTopologySimpleAudioSample::AddEventToEventList
+(
+    _In_  PKSEVENT_ENTRY    EventEntry 
+)
+/*++
+
+Routine Description:
+
+  The AddEventToEventList method adds an event to the port driver's event list
+
+Arguments:
+
+  EventEntry - 
+
+--*/
+{
+    PAGED_CODE();
+    DPF_ENTER(("[CMiniportTopology::AddEventToEventList]"));
+
+    ASSERT(m_PortEvents != NULL);
+
+    m_PortEvents->AddEventToEventList(EventEntry);
+}
+
+//=============================================================================
+#pragma code_seg()
+VOID
+CMiniportTopologySimpleAudioSample::GenerateEventList
+(
+    _In_opt_    GUID   *Set,
+    _In_        ULONG   EventId,
+    _In_        BOOL    PinEvent,
+    _In_        ULONG   PinId,
+    _In_        BOOL    NodeEvent,
+    _In_        ULONG   NodeId
+)
+/*++
+
+Routine Description:
+
+  The GenerateEventList method notifies clients through the port driver's list 
+  of event entries that a particular event has occurred.
+
+Arguments:
+
+  Set -
+
+  EventId - 
+
+  PinEvent -
+
+  PinId -
+
+  NodeEvent -
+
+  NodeId -
+
+--*/
+{
+    DPF_ENTER(("[CMiniportTopologySimpleAudioSample::GenerateEventList]"));
+
+    ASSERT(m_PortEvents != NULL);
+
+    m_PortEvents->GenerateEventList(
+        Set,
+        EventId,
+        PinEvent,
+        PinId,
+        NodeEvent,
+        NodeId);
+}
+ 
+#pragma code_seg()
diff --git a/audio/simpleaudiosample/Source/Main/common.cpp b/audio/simpleaudiosample/Source/Main/common.cpp
new file mode 100644
index 00000000..8843d3a4
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Main/common.cpp
@@ -0,0 +1,2772 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    common.cpp
+
+Abstract:
+
+    Implementation of the AdapterCommon class. 
+--*/
+
+#pragma warning (disable : 4127)
+
+#include <initguid.h>
+#include "definitions.h"
+#include "hw.h"
+#include "savedata.h"
+#include "endpoints.h"
+
+//-----------------------------------------------------------------------------
+// CSaveData statics
+//-----------------------------------------------------------------------------
+
+PSAVEWORKER_PARAM       CSaveData::m_pWorkItems = NULL;
+PDEVICE_OBJECT          CSaveData::m_pDeviceObject = NULL;
+//=============================================================================
+// Classes
+//=============================================================================
+
+///////////////////////////////////////////////////////////////////////////////
+// CAdapterCommon
+//   
+class CAdapterCommon : 
+    public IAdapterCommon,
+    public IAdapterPowerManagement,
+    public CUnknown    
+{
+    private:
+        PSERVICEGROUP           m_pServiceGroupWave;
+        PDEVICE_OBJECT          m_pDeviceObject;
+        PDEVICE_OBJECT          m_pPhysicalDeviceObject;
+        WDFDEVICE               m_WdfDevice;            // Wdf device. 
+        DEVICE_POWER_STATE      m_PowerState;  
+
+        PCSimpleAudioSampleHW   m_pHW;                  // Virtual Simple Audio Sample HW object
+        PPORTCLSETWHELPER       m_pPortClsEtwHelper;
+
+        static LONG             m_AdapterInstances;     // # of adapter objects.
+
+        DWORD                   m_dwIdleRequests;
+
+    public:
+        //=====================================================================
+        // Default CUnknown
+        DECLARE_STD_UNKNOWN();
+        DEFINE_STD_CONSTRUCTOR(CAdapterCommon);
+        ~CAdapterCommon();
+
+        //=====================================================================
+        // Default IAdapterPowerManagement
+        IMP_IAdapterPowerManagement;
+
+        //=====================================================================
+        // IAdapterCommon methods      
+
+        STDMETHODIMP_(NTSTATUS) Init
+        (   
+            _In_  PDEVICE_OBJECT  DeviceObject
+        );
+
+        STDMETHODIMP_(PDEVICE_OBJECT)   GetDeviceObject(void);
+        
+        STDMETHODIMP_(PDEVICE_OBJECT)   GetPhysicalDeviceObject(void);
+        
+        STDMETHODIMP_(WDFDEVICE)        GetWdfDevice(void);
+
+        STDMETHODIMP_(void)     SetWaveServiceGroup
+        (   
+            _In_  PSERVICEGROUP   ServiceGroup
+        );
+
+        STDMETHODIMP_(BOOL)     bDevSpecificRead();
+
+        STDMETHODIMP_(void)     bDevSpecificWrite
+        (
+            _In_  BOOL            bDevSpecific
+        );
+        STDMETHODIMP_(INT)      iDevSpecificRead();
+
+        STDMETHODIMP_(void)     iDevSpecificWrite
+        (
+            _In_  INT             iDevSpecific
+        );
+        STDMETHODIMP_(UINT)     uiDevSpecificRead();
+
+        STDMETHODIMP_(void)     uiDevSpecificWrite
+        (
+            _In_  UINT            uiDevSpecific
+        );
+
+        STDMETHODIMP_(BOOL)     MixerMuteRead
+        (
+            _In_  ULONG           Index,
+            _In_  ULONG           Channel
+        );
+
+        STDMETHODIMP_(void)     MixerMuteWrite
+        (
+            _In_  ULONG           Index,
+            _In_  ULONG           Channel,
+            _In_  BOOL            Value
+        );
+
+        STDMETHODIMP_(ULONG)    MixerMuxRead(void);
+
+        STDMETHODIMP_(void)     MixerMuxWrite
+        (
+            _In_  ULONG           Index
+        );
+
+        STDMETHODIMP_(void)     MixerReset(void);
+
+        STDMETHODIMP_(LONG)     MixerVolumeRead
+        ( 
+            _In_  ULONG           Index,
+            _In_  ULONG           Channel
+        );
+
+        STDMETHODIMP_(void)     MixerVolumeWrite
+        ( 
+            _In_  ULONG           Index,
+            _In_  ULONG           Channel,
+            _In_  LONG            Value 
+        );
+
+        STDMETHODIMP_(LONG)     MixerPeakMeterRead
+        ( 
+            _In_  ULONG           Index,
+            _In_  ULONG           Channel
+        );
+
+        STDMETHODIMP_(NTSTATUS) WriteEtwEvent 
+        ( 
+            _In_ EPcMiniportEngineEvent    miniportEventType,
+            _In_ ULONGLONG      ullData1,
+            _In_ ULONGLONG      ullData2,
+            _In_ ULONGLONG      ullData3,
+            _In_ ULONGLONG      ullData4
+        );
+
+        STDMETHODIMP_(VOID)     SetEtwHelper 
+        ( 
+            PPORTCLSETWHELPER _pPortClsEtwHelper
+        );
+        
+        STDMETHODIMP_(NTSTATUS) InstallSubdevice
+        ( 
+            _In_opt_        PIRP                                        Irp,
+            _In_            PWSTR                                       Name,
+            _In_opt_        PWSTR                                       TemplateName,
+            _In_            REFGUID                                     PortClassId,
+            _In_            REFGUID                                     MiniportClassId,
+            _In_opt_        PFNCREATEMINIPORT                           MiniportCreate,
+            _In_            ULONG                                       cPropertyCount,
+            _In_reads_opt_(cPropertyCount) const SIMPLEAUDIOSAMPLE_DEVPROPERTY   * pProperties,
+            _In_opt_        PVOID                                       DeviceContext,
+            _In_            PENDPOINT_MINIPAIR                          MiniportPair,
+            _In_opt_        PRESOURCELIST                               ResourceList,
+            _In_            REFGUID                                     PortInterfaceId,
+            _Out_opt_       PUNKNOWN                                  * OutPortInterface,
+            _Out_opt_       PUNKNOWN                                  * OutPortUnknown,
+            _Out_opt_       PUNKNOWN                                  * OutMiniportUnknown
+        );
+        
+        STDMETHODIMP_(NTSTATUS) UnregisterSubdevice
+        (
+            _In_opt_ PUNKNOWN               UnknownPort
+        );
+        
+        STDMETHODIMP_(NTSTATUS) ConnectTopologies
+        (
+            _In_ PUNKNOWN                   UnknownTopology,
+            _In_ PUNKNOWN                   UnknownWave,
+            _In_ PHYSICALCONNECTIONTABLE*   PhysicalConnections,
+            _In_ ULONG                      PhysicalConnectionCount
+        );
+        
+        STDMETHODIMP_(NTSTATUS) DisconnectTopologies
+        (
+            _In_ PUNKNOWN                   UnknownTopology,
+            _In_ PUNKNOWN                   UnknownWave,
+            _In_ PHYSICALCONNECTIONTABLE*   PhysicalConnections,
+            _In_ ULONG                      PhysicalConnectionCount
+        );
+        
+        STDMETHODIMP_(NTSTATUS) InstallEndpointFilters
+        (
+            _In_opt_    PIRP                Irp, 
+            _In_        PENDPOINT_MINIPAIR  MiniportPair,
+            _In_opt_    PVOID               DeviceContext,
+            _Out_opt_   PUNKNOWN *          UnknownTopology,
+            _Out_opt_   PUNKNOWN *          UnknownWave,
+            _Out_opt_   PUNKNOWN *          UnknownMiniportTopology,
+            _Out_opt_   PUNKNOWN *          UnknownMiniportWave
+        );
+        
+        STDMETHODIMP_(NTSTATUS) RemoveEndpointFilters
+        (
+            _In_        PENDPOINT_MINIPAIR  MiniportPair,
+            _In_opt_    PUNKNOWN            UnknownTopology,
+            _In_opt_    PUNKNOWN            UnknownWave
+        );
+
+        STDMETHODIMP_(NTSTATUS) GetFilters
+        (
+            _In_        PENDPOINT_MINIPAIR  MiniportPair,
+            _Out_opt_   PUNKNOWN            *UnknownTopologyPort,
+            _Out_opt_   PUNKNOWN            *UnknownTopologyMiniport,
+            _Out_opt_   PUNKNOWN            *UnknownWavePort,
+            _Out_opt_   PUNKNOWN            *UnknownWaveMiniport
+        );
+
+        STDMETHODIMP_(NTSTATUS) SetIdlePowerManagement
+        (
+            _In_        PENDPOINT_MINIPAIR  MiniportPair,
+            _In_        BOOL                bEnabled
+        );
+
+        STDMETHODIMP_(VOID) Cleanup();
+
+        //=====================================================================
+        // friends
+        friend NTSTATUS         NewAdapterCommon
+        ( 
+            _Out_       PUNKNOWN *              Unknown,
+            _In_        REFCLSID,
+            _In_opt_    PUNKNOWN                UnknownOuter,
+            _In_        POOL_FLAGS              PoolFlags
+        );
+
+    private:
+
+    LIST_ENTRY m_SubdeviceCache;
+
+    NTSTATUS GetCachedSubdevice
+    (
+        _In_ PWSTR Name,
+        _Out_opt_ PUNKNOWN *OutUnknownPort,
+        _Out_opt_ PUNKNOWN *OutUnknownMiniport
+    );
+
+    NTSTATUS CacheSubdevice
+    (
+        _In_ PWSTR Name,
+        _In_ PUNKNOWN UnknownPort,
+        _In_ PUNKNOWN UnknownMiniport
+    );
+    
+    NTSTATUS RemoveCachedSubdevice
+    (
+        _In_ PWSTR Name
+    );
+
+    VOID EmptySubdeviceCache();
+
+    NTSTATUS CreateAudioInterfaceWithProperties
+    (
+        _In_ PCWSTR                                                 ReferenceString,
+        _In_opt_ PCWSTR                                             TemplateReferenceString,
+        _In_ ULONG                                                  cPropertyCount,
+        _In_reads_opt_(cPropertyCount) const SIMPLEAUDIOSAMPLE_DEVPROPERTY        *pProperties,
+        _Out_ _At_(AudioSymbolicLinkName->Buffer, __drv_allocatesMem(Mem)) PUNICODE_STRING AudioSymbolicLinkName
+    );
+
+    NTSTATUS MigrateDeviceInterfaceTemplateParameters
+    (
+        _In_ PUNICODE_STRING    SymbolicLinkName,
+        _In_opt_ PCWSTR         TemplateReferenceString
+    );
+};
+
+typedef struct _MINIPAIR_UNKNOWN
+{
+    LIST_ENTRY              ListEntry;
+    WCHAR                   Name[MAX_PATH];
+    PUNKNOWN                PortInterface;
+    PUNKNOWN                MiniportInterface;
+    PADAPTERPOWERMANAGEMENT PowerInterface;
+} MINIPAIR_UNKNOWN;
+
+#define MAX_DEVICE_REG_KEY_LENGTH 0x100
+
+//
+// Used to implement the singleton pattern.
+//
+LONG  CAdapterCommon::m_AdapterInstances = 0;
+
+
+
+//-----------------------------------------------------------------------------
+// Functions
+//-----------------------------------------------------------------------------
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS SimpleAudioSampleIoSetDeviceInterfacePropertyDataMultiple
+(
+    _In_ PUNICODE_STRING                                        SymbolicLinkName,
+    _In_ ULONG                                                  cPropertyCount,
+    _In_reads_opt_(cPropertyCount) const SIMPLEAUDIOSAMPLE_DEVPROPERTY        *pProperties
+)
+{
+    NTSTATUS ntStatus;
+
+    PAGED_CODE();
+
+    if (pProperties)
+    {
+        for (ULONG i = 0; i < cPropertyCount; i++)
+        {
+            ntStatus = IoSetDeviceInterfacePropertyData(
+                SymbolicLinkName,
+                pProperties[i].PropertyKey,
+                LOCALE_NEUTRAL,
+                PLUGPLAY_PROPERTY_PERSISTENT,
+                pProperties[i].Type,
+                pProperties[i].BufferSize,
+                pProperties[i].Buffer);
+
+            if (!NT_SUCCESS(ntStatus))
+            {
+                return ntStatus;
+            }
+        }
+    }
+
+    return STATUS_SUCCESS;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+NewAdapterCommon
+( 
+    _Out_       PUNKNOWN *              Unknown,
+    _In_        REFCLSID,
+    _In_opt_    PUNKNOWN                UnknownOuter,
+    _In_        POOL_FLAGS               PoolFlags
+)
+/*++
+
+Routine Description:
+
+  Creates a new CAdapterCommon
+
+Arguments:
+
+  Unknown - 
+
+  UnknownOuter -
+
+  PoolType
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    ASSERT(Unknown);
+
+    NTSTATUS ntStatus;
+
+    //
+    // This sample supports only one instance of this object.
+    // (b/c of CSaveData's static members and Bluetooth HFP logic). 
+    //
+    if (InterlockedCompareExchange(&CAdapterCommon::m_AdapterInstances, 1, 0) != 0)
+    {
+        ntStatus = STATUS_DEVICE_BUSY;
+        DPF(D_ERROR, ("NewAdapterCommon failed, only one instance is allowed"));
+        goto Done;
+    }
+    
+    //
+    // Allocate an adapter object.
+    //
+    CAdapterCommon *p = new(PoolFlags, MINADAPTER_POOLTAG) CAdapterCommon(UnknownOuter);
+    if (p == NULL)
+    {
+        ntStatus = STATUS_INSUFFICIENT_RESOURCES;
+        DPF(D_ERROR, ("NewAdapterCommon failed, 0x%x", ntStatus));
+        goto Done;
+    }
+
+    // 
+    // Success.
+    //
+    *Unknown = PUNKNOWN((PADAPTERCOMMON)(p));
+    (*Unknown)->AddRef(); 
+    ntStatus = STATUS_SUCCESS; 
+
+Done:    
+    return ntStatus;
+} // NewAdapterCommon
+
+//=============================================================================
+#pragma code_seg("PAGE")
+CAdapterCommon::~CAdapterCommon
+( 
+    void 
+)
+/*++
+
+Routine Description:
+
+  Destructor for CAdapterCommon.
+
+Arguments:
+
+Return Value:
+
+  void
+
+--*/
+{
+    PAGED_CODE();
+    DPF_ENTER(("[CAdapterCommon::~CAdapterCommon]"));
+
+    if (m_pHW)
+    {
+        delete m_pHW;
+        m_pHW = NULL;
+    }
+    
+    CSaveData::DestroyWorkItems();
+    SAFE_RELEASE(m_pPortClsEtwHelper);
+    SAFE_RELEASE(m_pServiceGroupWave);
+ 
+    if (m_WdfDevice)
+    {
+        WdfObjectDelete(m_WdfDevice);
+        m_WdfDevice = NULL;
+    }
+
+    InterlockedDecrement(&CAdapterCommon::m_AdapterInstances);
+    ASSERT(CAdapterCommon::m_AdapterInstances == 0);
+} // ~CAdapterCommon  
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP_(PDEVICE_OBJECT)   
+CAdapterCommon::GetDeviceObject
+(
+    void
+)
+/*++
+
+Routine Description:
+
+  Returns the deviceobject
+
+Arguments:
+
+Return Value:
+
+  PDEVICE_OBJECT
+
+--*/
+{
+    PAGED_CODE();
+    
+    return m_pDeviceObject;
+} // GetDeviceObject
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP_(PDEVICE_OBJECT)   
+CAdapterCommon::GetPhysicalDeviceObject
+(
+    void
+)
+/*++
+
+Routine Description:
+
+  Returns the PDO.
+
+Arguments:
+
+Return Value:
+
+  PDEVICE_OBJECT
+
+--*/
+{
+    PAGED_CODE();
+    
+    return m_pPhysicalDeviceObject;
+} // GetPhysicalDeviceObject
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP_(WDFDEVICE)   
+CAdapterCommon::GetWdfDevice
+(
+    void
+)
+/*++
+
+Routine Description:
+
+  Returns the associated WDF miniport device. Note that this is NOT an audio
+  miniport. The WDF miniport device is the WDF device associated with the
+  adapter.
+
+Arguments:
+
+Return Value:
+
+  WDFDEVICE
+
+--*/
+{
+    PAGED_CODE();
+    
+    return m_WdfDevice;
+} // GetWdfDevice
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+CAdapterCommon::Init
+( 
+    _In_  PDEVICE_OBJECT          DeviceObject 
+)
+/*++
+
+Routine Description:
+
+    Initialize adapter common object.
+
+Arguments:
+
+    DeviceObject - pointer to the device object
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+    DPF_ENTER(("[CAdapterCommon::Init]"));
+
+    ASSERT(DeviceObject);
+
+    NTSTATUS        ntStatus    = STATUS_SUCCESS;
+
+    m_pServiceGroupWave     = NULL;
+    m_pDeviceObject         = DeviceObject;
+    m_pPhysicalDeviceObject = NULL;
+    m_WdfDevice             = NULL;
+    m_PowerState            = PowerDeviceD0;
+    m_pHW                   = NULL;
+    m_pPortClsEtwHelper     = NULL;
+
+    InitializeListHead(&m_SubdeviceCache);
+
+    //
+    // Get the PDO.
+    //
+    ntStatus = PcGetPhysicalDeviceObject(DeviceObject, &m_pPhysicalDeviceObject);
+    IF_FAILED_ACTION_JUMP(
+        ntStatus,
+        DPF(D_ERROR, ("PcGetPhysicalDeviceObject failed, 0x%x", ntStatus)),
+        Done);
+
+    //
+    // Create a WDF miniport to represent the adapter. Note that WDF miniports 
+    // are NOT audio miniports. An audio adapter is associated with a single WDF
+    // miniport. This driver uses WDF to simplify the handling of the Bluetooth
+    // SCO HFP Bypass interface.
+    //
+    ntStatus = WdfDeviceMiniportCreate( WdfGetDriver(),
+                                        WDF_NO_OBJECT_ATTRIBUTES,
+                                        DeviceObject,           // FDO
+                                        NULL,                   // Next device.
+                                        NULL,                   // PDO
+                                       &m_WdfDevice);
+    IF_FAILED_ACTION_JUMP(
+        ntStatus,
+        DPF(D_ERROR, ("WdfDeviceMiniportCreate failed, 0x%x", ntStatus)),
+        Done);
+
+    // Initialize HW.
+    // 
+    m_pHW = new (POOL_FLAG_NON_PAGED, SIMPLEAUDIOSAMPLE_POOLTAG)  CSimpleAudioSampleHW;
+    if (!m_pHW)
+    {
+        DPF(D_TERSE, ("Insufficient memory for Simple Audio Sample HW"));
+        ntStatus = STATUS_INSUFFICIENT_RESOURCES;
+    }
+    IF_FAILED_JUMP(ntStatus, Done);
+    
+    m_pHW->MixerReset();
+
+    //
+    // Initialize SaveData class.
+    //
+    CSaveData::SetDeviceObject(DeviceObject);   //device object is needed by CSaveData
+    ntStatus = CSaveData::InitializeWorkItems(DeviceObject);
+    IF_FAILED_JUMP(ntStatus, Done);
+Done:
+
+    return ntStatus;
+} // Init
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP_(void)
+CAdapterCommon::MixerReset
+( 
+    void 
+)
+/*++
+
+Routine Description:
+
+  Reset mixer registers from registry.
+
+Arguments:
+
+Return Value:
+
+  void
+
+--*/
+{
+    PAGED_CODE();
+    
+    if (m_pHW)
+    {
+        m_pHW->MixerReset();
+    }
+} // MixerReset
+
+//=============================================================================
+/* Here are the definitions of the standard miniport events.
+
+Event type  : eMINIPORT_IHV_DEFINED 
+Parameter 1 : Defined and used by IHVs
+Parameter 2 : Defined and used by IHVs
+Parameter 3 : Defined and used by IHVs
+Parameter 4 :Defined and used by IHVs
+
+Event type: eMINIPORT_BUFFER_COMPLETE
+Parameter 1: Current linear buffer position    
+Parameter 2: the previous WaveRtBufferWritePosition that the drive received    
+Parameter 3: Data length completed
+Parameter 4:0
+
+Event type: eMINIPORT_PIN_STATE
+Parameter 1: Current linear buffer position    
+Parameter 2: the previous WaveRtBufferWritePosition that the drive received        
+Parameter 3: Pin State 0->KS_STOP, 1->KS_ACQUIRE, 2->KS_PAUSE, 3->KS_RUN 
+Parameter 4:0
+
+Event type: eMINIPORT_GET_STREAM_POS
+Parameter 1: Current linear buffer position    
+Parameter 2: the previous WaveRtBufferWritePosition that the drive received    
+Parameter 3: 0
+Parameter 4:0
+
+
+Event type: eMINIPORT_SET_WAVERT_BUFFER_WRITE_POS
+Parameter 1: Current linear buffer position    
+Parameter 2: the previous WaveRtBufferWritePosition that the drive received    
+Parameter 3: the arget WaveRtBufferWritePosition received from portcls
+Parameter 4:0
+
+Event type: eMINIPORT_GET_PRESENTATION_POS
+Parameter 1: Current linear buffer position    
+Parameter 2: the previous WaveRtBufferWritePosition that the drive received    
+Parameter 3: Presentation position
+Parameter 4:0
+
+Event type: eMINIPORT_PROGRAM_DMA 
+Parameter 1: Current linear buffer position    
+Parameter 2: the previous WaveRtBufferWritePosition that the drive received    
+Parameter 3: Starting  WaveRt buffer offset
+Parameter 4: Data length
+
+Event type: eMINIPORT_GLITCH_REPORT
+Parameter 1: Current linear buffer position    
+Parameter 2: the previous WaveRtBufferWritePosition that the drive received    
+Parameter 3: major glitch code: 1:WaveRT buffer is underrun, 
+                                2:decoder errors, 
+                                3:receive the same wavert buffer two in a row in event driven mode
+Parameter 4: minor code for the glitch cause
+
+Event type: eMINIPORT_LAST_BUFFER_RENDERED
+Parameter 1: Current linear buffer position    
+Parameter 2: the very last WaveRtBufferWritePosition that the driver received    
+Parameter 3: 0
+Parameter 4: 0
+
+*/
+#pragma code_seg()
+STDMETHODIMP
+CAdapterCommon::WriteEtwEvent
+( 
+    _In_ EPcMiniportEngineEvent    miniportEventType,
+    _In_ ULONGLONG  ullData1,
+    _In_ ULONGLONG  ullData2,
+    _In_ ULONGLONG  ullData3,
+    _In_ ULONGLONG  ullData4
+)
+{
+    NTSTATUS ntStatus = STATUS_SUCCESS;
+
+    if (m_pPortClsEtwHelper)
+    {
+        ntStatus = m_pPortClsEtwHelper->MiniportWriteEtwEvent( miniportEventType, ullData1, ullData2, ullData3, ullData4) ;
+    }
+    return ntStatus;
+} // WriteEtwEvent
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP_(void)
+CAdapterCommon::SetEtwHelper
+( 
+    PPORTCLSETWHELPER _pPortClsEtwHelper
+)
+{
+    PAGED_CODE();
+    
+    SAFE_RELEASE(m_pPortClsEtwHelper);
+
+    m_pPortClsEtwHelper = _pPortClsEtwHelper;
+
+    if (m_pPortClsEtwHelper)
+    {
+        m_pPortClsEtwHelper->AddRef();
+    }
+} // SetEtwHelper
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP
+CAdapterCommon::NonDelegatingQueryInterface
+( 
+    _In_ REFIID                      Interface,
+    _COM_Outptr_ PVOID *        Object 
+)
+/*++
+
+Routine Description:
+
+  QueryInterface routine for AdapterCommon
+
+Arguments:
+
+  Interface - 
+
+  Object -
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    ASSERT(Object);
+
+    if (IsEqualGUIDAligned(Interface, IID_IUnknown))
+    {
+        *Object = PVOID(PUNKNOWN(PADAPTERCOMMON(this)));
+    }
+    else if (IsEqualGUIDAligned(Interface, IID_IAdapterCommon))
+    {
+        *Object = PVOID(PADAPTERCOMMON(this));
+    }
+    else if (IsEqualGUIDAligned(Interface, IID_IAdapterPowerManagement))
+    {
+        *Object = PVOID(PADAPTERPOWERMANAGEMENT(this));
+    }
+    else
+    {
+        *Object = NULL;
+    }
+
+    if (*Object)
+    {
+        PUNKNOWN(*Object)->AddRef();
+        return STATUS_SUCCESS;
+    }
+
+    return STATUS_INVALID_PARAMETER;
+} // NonDelegatingQueryInterface
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP_(void)
+CAdapterCommon::SetWaveServiceGroup
+( 
+    _In_ PSERVICEGROUP            ServiceGroup 
+)
+/*++
+
+Routine Description:
+
+
+Arguments:
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+    DPF_ENTER(("[CAdapterCommon::SetWaveServiceGroup]"));
+    
+    SAFE_RELEASE(m_pServiceGroupWave);
+
+    m_pServiceGroupWave = ServiceGroup;
+
+    if (m_pServiceGroupWave)
+    {
+        m_pServiceGroupWave->AddRef();
+    }
+} // SetWaveServiceGroup
+
+//=============================================================================
+#pragma code_seg()
+STDMETHODIMP_(BOOL)
+CAdapterCommon::bDevSpecificRead()
+/*++
+
+Routine Description:
+
+  Fetch Device Specific information.
+
+Arguments:
+
+  N/A
+
+Return Value:
+
+    BOOL - Device Specific info
+
+--*/
+{
+    if (m_pHW)
+    {
+        return m_pHW->bGetDevSpecific();
+    }
+
+    return FALSE;
+} // bDevSpecificRead
+
+//=============================================================================
+#pragma code_seg()
+STDMETHODIMP_(void)
+CAdapterCommon::bDevSpecificWrite
+(
+    _In_  BOOL                    bDevSpecific
+)
+/*++
+
+Routine Description:
+
+  Store the new value in the Device Specific location.
+
+Arguments:
+
+  bDevSpecific - Value to store
+
+Return Value:
+
+  N/A.
+
+--*/
+{
+    if (m_pHW)
+    {
+        m_pHW->bSetDevSpecific(bDevSpecific);
+    }
+} // DevSpecificWrite
+
+//=============================================================================
+#pragma code_seg()
+STDMETHODIMP_(INT)
+CAdapterCommon::iDevSpecificRead()
+/*++
+
+Routine Description:
+
+  Fetch Device Specific information.
+
+Arguments:
+
+  N/A
+
+Return Value:
+
+    INT - Device Specific info
+
+--*/
+{
+    if (m_pHW)
+    {
+        return m_pHW->iGetDevSpecific();
+    }
+
+    return 0;
+} // iDevSpecificRead
+
+//=============================================================================
+#pragma code_seg()
+STDMETHODIMP_(void)
+CAdapterCommon::iDevSpecificWrite
+(
+    _In_  INT                    iDevSpecific
+)
+/*++
+
+Routine Description:
+
+  Store the new value in the Device Specific location.
+
+Arguments:
+
+  iDevSpecific - Value to store
+
+Return Value:
+
+  N/A.
+
+--*/
+{
+    if (m_pHW)
+    {
+        m_pHW->iSetDevSpecific(iDevSpecific);
+    }
+} // iDevSpecificWrite
+
+//=============================================================================
+#pragma code_seg()
+STDMETHODIMP_(UINT)
+CAdapterCommon::uiDevSpecificRead()
+/*++
+
+Routine Description:
+
+  Fetch Device Specific information.
+
+Arguments:
+
+  N/A
+
+Return Value:
+
+    UINT - Device Specific info
+
+--*/
+{
+    if (m_pHW)
+    {
+        return m_pHW->uiGetDevSpecific();
+    }
+
+    return 0;
+} // uiDevSpecificRead
+
+//=============================================================================
+#pragma code_seg()
+STDMETHODIMP_(void)
+CAdapterCommon::uiDevSpecificWrite
+(
+    _In_  UINT                    uiDevSpecific
+)
+/*++
+
+Routine Description:
+
+  Store the new value in the Device Specific location.
+
+Arguments:
+
+  uiDevSpecific - Value to store
+
+Return Value:
+
+  N/A.
+
+--*/
+{
+    if (m_pHW)
+    {
+        m_pHW->uiSetDevSpecific(uiDevSpecific);
+    }
+} // uiDevSpecificWrite
+
+//=============================================================================
+#pragma code_seg()
+STDMETHODIMP_(BOOL)
+CAdapterCommon::MixerMuteRead
+(
+    _In_  ULONG               Index,
+    _In_  ULONG               Channel
+)
+/*++
+
+Routine Description:
+
+  Store the new value in mixer register array.
+
+Arguments:
+
+  Index - node id
+
+Return Value:
+
+    BOOL - mixer mute setting for this node
+
+--*/
+{
+    if (m_pHW)
+    {
+        return m_pHW->GetMixerMute(Index, Channel);
+    }
+
+    return 0;
+} // MixerMuteRead
+
+//=============================================================================
+#pragma code_seg()
+STDMETHODIMP_(void)
+CAdapterCommon::MixerMuteWrite
+(
+    _In_  ULONG                   Index,
+    _In_  ULONG                   Channel,
+    _In_  BOOL                    Value
+)
+/*++
+
+Routine Description:
+
+  Store the new value in mixer register array.
+
+Arguments:
+
+  Index - node id
+
+  Value - new mute settings
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    if (m_pHW)
+    {
+        m_pHW->SetMixerMute(Index, Channel, Value);
+    }
+} // MixerMuteWrite
+
+//=============================================================================
+#pragma code_seg()
+STDMETHODIMP_(ULONG)
+CAdapterCommon::MixerMuxRead() 
+/*++
+
+Routine Description:
+
+  Return the mux selection
+
+Arguments:
+
+  Index - node id
+
+  Value - new mute settings
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    if (m_pHW)
+    {
+        return m_pHW->GetMixerMux();
+    }
+
+    return 0;
+} // MixerMuxRead
+
+//=============================================================================
+#pragma code_seg()
+STDMETHODIMP_(void)
+CAdapterCommon::MixerMuxWrite
+(
+    _In_  ULONG                   Index
+)
+/*++
+
+Routine Description:
+
+  Store the new mux selection
+
+Arguments:
+
+  Index - node id
+
+  Value - new mute settings
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    if (m_pHW)
+    {
+        m_pHW->SetMixerMux(Index);
+    }
+} // MixerMuxWrite
+
+//=============================================================================
+#pragma code_seg()
+STDMETHODIMP_(LONG)
+CAdapterCommon::MixerVolumeRead
+( 
+    _In_  ULONG                   Index,
+    _In_  ULONG                   Channel
+)
+/*++
+
+Routine Description:
+
+  Return the value in mixer register array.
+
+Arguments:
+
+  Index - node id
+
+  Channel = which channel
+
+Return Value:
+
+    Byte - mixer volume settings for this line
+
+--*/
+{
+    if (m_pHW)
+    {
+        return m_pHW->GetMixerVolume(Index, Channel);
+    }
+
+    return 0;
+} // MixerVolumeRead
+
+//=============================================================================
+#pragma code_seg()
+STDMETHODIMP_(void)
+CAdapterCommon::MixerVolumeWrite
+( 
+    _In_  ULONG                   Index,
+    _In_  ULONG                   Channel,
+    _In_  LONG                    Value
+)
+/*++
+
+Routine Description:
+
+  Store the new value in mixer register array.
+
+Arguments:
+
+  Index - node id
+
+  Channel - which channel
+
+  Value - new volume level
+
+Return Value:
+
+    void
+
+--*/
+{
+    if (m_pHW)
+    {
+        m_pHW->SetMixerVolume(Index, Channel, Value);
+    }
+} // MixerVolumeWrite
+
+//=============================================================================
+#pragma code_seg()
+STDMETHODIMP_(LONG)
+CAdapterCommon::MixerPeakMeterRead
+( 
+    _In_  ULONG                   Index,
+    _In_  ULONG                   Channel
+)
+/*++
+
+Routine Description:
+
+  Return the value in mixer register array.
+
+Arguments:
+
+  Index - node id
+
+  Channel = which channel
+
+Return Value:
+
+    Byte - mixer sample peak meter settings for this line
+
+--*/
+{
+    if (m_pHW)
+    {
+        return m_pHW->GetMixerPeakMeter(Index, Channel);
+    }
+
+    return 0;
+} // MixerVolumeRead
+
+//=============================================================================
+#pragma code_seg()
+STDMETHODIMP_(void)
+CAdapterCommon::PowerChangeState
+( 
+    _In_  POWER_STATE             NewState 
+)
+/*++
+
+Routine Description:
+
+
+Arguments:
+
+  NewState - The requested, new power state for the device. 
+
+Return Value:
+
+    void
+
+Note:
+  From MSDN:
+
+  To assist the driver, PortCls will pause any active audio streams prior to calling
+  this method to place the device in a sleep state. After calling this method, PortCls
+  will unpause active audio streams, to wake the device up. Miniports can opt for 
+  additional notification by utilizing the IPowerNotify interface.
+
+  The miniport driver must perform the requested change to the device's power state 
+  before it returns from the PowerChangeState call. If the miniport driver needs to 
+  save or restore any device state before a power-state change, the miniport driver 
+  should support the IPowerNotify interface, which allows it to receive advance warning
+  of any such change. Before returning from a successful PowerChangeState call, the 
+  miniport driver should cache the new power state.
+
+  While the miniport driver is in one of the sleep states (any state other than 
+  PowerDeviceD0), it must avoid writing to the hardware. The miniport driver must cache
+  any hardware accesses that need to be deferred until the device powers up again. If
+  the power state is changing from one of the sleep states to PowerDeviceD0, the 
+  miniport driver should perform any deferred hardware accesses after it has powered up
+  the device. If the power state is changing from PowerDeviceD0 to a sleep state, the 
+  miniport driver can perform any necessary hardware accesses during the PowerChangeState
+  call before it powers down the device.
+
+  While powered down, a miniport driver is never asked to create a miniport driver object
+  or stream object. PortCls always places the device in the PowerDeviceD0 state before
+  calling the miniport driver's NewStream method.
+  
+--*/
+{
+    DPF_ENTER(("[CAdapterCommon::PowerChangeState]"));
+
+    // Notify all registered miniports of a power state change
+    PLIST_ENTRY le = NULL;
+    for (le = m_SubdeviceCache.Flink; le != &m_SubdeviceCache; le = le->Flink)
+    {
+        MINIPAIR_UNKNOWN *pRecord = CONTAINING_RECORD(le, MINIPAIR_UNKNOWN, ListEntry);
+
+        if (pRecord->PowerInterface)
+        {
+            pRecord->PowerInterface->PowerChangeState(NewState);
+        }
+    }
+
+    // is this actually a state change??
+    //
+    if (NewState.DeviceState != m_PowerState)
+    {
+        // switch on new state
+        //
+        switch (NewState.DeviceState)
+        {
+            case PowerDeviceD0:
+            case PowerDeviceD1:
+            case PowerDeviceD2:
+            case PowerDeviceD3:
+                m_PowerState = NewState.DeviceState;
+
+                DPF
+                ( 
+                    D_VERBOSE, 
+                    ("Entering D%u", ULONG(m_PowerState) - ULONG(PowerDeviceD0)) 
+                );
+
+                break;
+    
+            default:
+            
+                DPF(D_VERBOSE, ("Unknown Device Power State"));
+                break;
+        }
+    }
+} // PowerStateChange
+
+//=============================================================================
+#pragma code_seg()
+STDMETHODIMP_(NTSTATUS)
+CAdapterCommon::QueryDeviceCapabilities
+( 
+    _Inout_updates_bytes_(sizeof(DEVICE_CAPABILITIES)) PDEVICE_CAPABILITIES    PowerDeviceCaps 
+)
+/*++
+
+Routine Description:
+
+    Called at startup to get the caps for the device.  This structure provides 
+    the system with the mappings between system power state and device power 
+    state.  This typically will not need modification by the driver.         
+
+Arguments:
+
+  PowerDeviceCaps - The device's capabilities. 
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    UNREFERENCED_PARAMETER(PowerDeviceCaps);
+
+    DPF_ENTER(("[CAdapterCommon::QueryDeviceCapabilities]"));
+
+    return (STATUS_SUCCESS);
+} // QueryDeviceCapabilities
+
+//=============================================================================
+#pragma code_seg()
+STDMETHODIMP_(NTSTATUS)
+CAdapterCommon::QueryPowerChangeState
+( 
+    _In_  POWER_STATE             NewStateQuery 
+)
+/*++
+
+Routine Description:
+
+  Query to see if the device can change to this power state 
+
+Arguments:
+
+  NewStateQuery - The requested, new power state for the device
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    NTSTATUS status = STATUS_SUCCESS;
+
+    DPF_ENTER(("[CAdapterCommon::QueryPowerChangeState]"));
+
+    // query each miniport for it's power state, we're finished if even one indicates
+    // it cannot go to this power state.
+    PLIST_ENTRY le = NULL;
+    for (le = m_SubdeviceCache.Flink; le != &m_SubdeviceCache && NT_SUCCESS(status); le = le->Flink)
+    {
+        MINIPAIR_UNKNOWN *pRecord = CONTAINING_RECORD(le, MINIPAIR_UNKNOWN, ListEntry);
+
+        if (pRecord->PowerInterface)
+        {
+            status = pRecord->PowerInterface->QueryPowerChangeState(NewStateQuery);
+        }
+    }
+
+    return status;
+} // QueryPowerChangeState
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+CAdapterCommon::CreateAudioInterfaceWithProperties
+(
+    _In_ PCWSTR ReferenceString,
+    _In_opt_ PCWSTR TemplateReferenceString,
+    _In_ ULONG cPropertyCount,
+    _In_reads_opt_(cPropertyCount) const SIMPLEAUDIOSAMPLE_DEVPROPERTY *pProperties,
+    _Out_ _At_(AudioSymbolicLinkName->Buffer, __drv_allocatesMem(Mem)) PUNICODE_STRING AudioSymbolicLinkName
+)
+/*++
+
+Routine Description:
+
+Create the audio interface (in disabled mode).
+
+--*/
+{
+    PAGED_CODE();
+    DPF_ENTER(("[CAdapterCommon::CreateAudioInterfaceWithProperties]"));
+
+    NTSTATUS        ntStatus;
+    UNICODE_STRING  referenceString;
+
+    RtlInitUnicodeString(&referenceString, ReferenceString);
+
+    //
+    // Reset output value.
+    //
+    RtlZeroMemory(AudioSymbolicLinkName, sizeof(UNICODE_STRING));
+
+    //
+    // Register an audio interface if not already present.
+    //
+    ntStatus = IoRegisterDeviceInterface(
+        GetPhysicalDeviceObject(),
+        &KSCATEGORY_AUDIO,
+        &referenceString,
+        AudioSymbolicLinkName);
+
+    IF_FAILED_ACTION_JUMP(
+        ntStatus,
+        DPF(D_ERROR, ("CreateAudioInterfaceWithProperties: IoRegisterDeviceInterface(KSCATEGORY_AUDIO): failed, 0x%x", ntStatus)),
+        Done);
+
+    //
+    // Migrate optional device interface parameters from the template if it exists
+    // This is done first, so that any additional parameters in pProperties will override the defaults.
+    //
+    if (NULL != TemplateReferenceString)
+    {
+        ntStatus = MigrateDeviceInterfaceTemplateParameters(AudioSymbolicLinkName, TemplateReferenceString);
+
+        IF_FAILED_ACTION_JUMP(
+            ntStatus,
+            DPF(D_ERROR, ("MigrateDeviceInterfaceTempalteParameters: MigrateDeviceInterfaceTemplateParameters(...): failed, 0x%x", ntStatus)),
+            Done);
+    }
+
+    //
+    // Set properties on the interface
+    //
+    ntStatus = SimpleAudioSampleIoSetDeviceInterfacePropertyDataMultiple(AudioSymbolicLinkName, cPropertyCount, pProperties);
+
+    IF_FAILED_ACTION_JUMP(
+        ntStatus,
+        DPF(D_ERROR, ("CreateAudioInterfaceWithProperties: SimpleAudioSampleIoSetDeviceInterfacePropertyDataMultiple(...): failed, 0x%x", ntStatus)),
+        Done);
+
+    //
+    // All done.
+    //
+    ntStatus = STATUS_SUCCESS;
+
+Done:
+    if (!NT_SUCCESS(ntStatus))
+    {
+        RtlFreeUnicodeString(AudioSymbolicLinkName);
+        RtlZeroMemory(AudioSymbolicLinkName, sizeof(UNICODE_STRING));
+    }
+    return ntStatus;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP_(NTSTATUS)
+CAdapterCommon::InstallSubdevice
+( 
+    _In_opt_        PIRP                                    Irp,
+    _In_            PWSTR                                   Name,
+    _In_opt_        PWSTR                                   TemplateName,
+    _In_            REFGUID                                 PortClassId,
+    _In_            REFGUID                                 MiniportClassId,
+    _In_opt_        PFNCREATEMINIPORT                       MiniportCreate,
+    _In_            ULONG                                   cPropertyCount,
+    _In_reads_opt_(cPropertyCount) const SIMPLEAUDIOSAMPLE_DEVPROPERTY * pProperties,
+    _In_opt_        PVOID                                   DeviceContext,
+    _In_            PENDPOINT_MINIPAIR                      MiniportPair,
+    _In_opt_        PRESOURCELIST                           ResourceList,
+    _In_            REFGUID                                 PortInterfaceId,
+    _Out_opt_       PUNKNOWN                              * OutPortInterface,
+    _Out_opt_       PUNKNOWN                              * OutPortUnknown,
+    _Out_opt_       PUNKNOWN                              * OutMiniportUnknown
+)
+{
+/*++
+
+Routine Description:
+
+    This function creates and registers a subdevice consisting of a port       
+    driver, a minport driver and a set of resources bound together.  It will   
+    also optionally place a pointer to an interface on the port driver in a    
+    specified location before initializing the port driver.  This is done so   
+    that a common ISR can have access to the port driver during 
+    initialization, when the ISR might fire.                                   
+
+Arguments:
+
+    Irp - pointer to the irp object.
+
+    Name - name of the miniport. Passes to PcRegisterSubDevice
+ 
+    PortClassId - port class id. Passed to PcNewPort.
+
+    MiniportClassId - miniport class id. Passed to PcNewMiniport.
+
+    MiniportCreate - pointer to a miniport creation function. If NULL, 
+                     PcNewMiniport is used.
+                     
+    DeviceContext - deviceType specific.
+
+    MiniportPair - endpoint configuration info.    
+
+    ResourceList - pointer to the resource list.
+
+    PortInterfaceId - GUID that represents the port interface.
+       
+    OutPortInterface - pointer to store the port interface
+
+    OutPortUnknown - pointer to store the unknown port interface.
+
+    OutMiniportUnknown - pointer to store the unknown miniport interface
+
+Return Value:
+
+    NT status code.
+
+--*/
+    PAGED_CODE();
+    DPF_ENTER(("[InstallSubDevice %S]", Name));
+
+    ASSERT(Name != NULL);
+    ASSERT(m_pDeviceObject != NULL);
+
+    NTSTATUS                    ntStatus;
+    PPORT                       port            = NULL;
+    PUNKNOWN                    miniport        = NULL;
+    PADAPTERCOMMON              adapterCommon   = NULL;
+    UNICODE_STRING              symbolicLink    = { 0 };
+
+    adapterCommon = PADAPTERCOMMON(this);
+
+    ntStatus = CreateAudioInterfaceWithProperties(Name, TemplateName, cPropertyCount, pProperties, &symbolicLink);
+    if (NT_SUCCESS(ntStatus))
+    {
+        // Currently have no use for the symbolic link
+        RtlFreeUnicodeString(&symbolicLink);
+
+        // Create the port driver object
+        //
+        ntStatus = PcNewPort(&port, PortClassId);
+    }
+
+    // Create the miniport object
+    //
+    if (NT_SUCCESS(ntStatus))
+    {
+        if (MiniportCreate)
+        {
+            ntStatus = 
+                MiniportCreate
+                ( 
+                    &miniport,
+                    MiniportClassId,
+                    NULL,
+                    POOL_FLAG_NON_PAGED,
+                    adapterCommon,
+                    DeviceContext,
+                    MiniportPair
+                );
+        }
+        else
+        {
+            ntStatus = 
+                PcNewMiniport
+                (
+                    (PMINIPORT *) &miniport, 
+                    MiniportClassId
+                );
+        }
+    }
+
+    // Init the port driver and miniport in one go.
+    //
+    if (NT_SUCCESS(ntStatus))
+    {
+#pragma warning(push)
+        // IPort::Init's annotation on ResourceList requires it to be non-NULL.  However,
+        // for dynamic devices, we may no longer have the resource list and this should
+        // still succeed.
+        //
+#pragma warning(disable:6387)
+        ntStatus = 
+            port->Init
+            ( 
+                m_pDeviceObject,
+                Irp,
+                miniport,
+                adapterCommon,
+                ResourceList 
+            );
+#pragma warning (pop)
+
+        if (NT_SUCCESS(ntStatus))
+        {
+            // Register the subdevice (port/miniport combination).
+            //
+            ntStatus = 
+                PcRegisterSubdevice
+                ( 
+                    m_pDeviceObject,
+                    Name,
+                    port 
+                );
+        }
+    }
+
+    // Deposit the port interfaces if it's needed.
+    //
+    if (NT_SUCCESS(ntStatus))
+    {
+        if (OutPortUnknown)
+        {
+            ntStatus = 
+                port->QueryInterface
+                ( 
+                    IID_IUnknown,
+                    (PVOID *)OutPortUnknown 
+                );
+        }
+
+        if (OutPortInterface)
+        {
+            ntStatus = 
+                port->QueryInterface
+                ( 
+                    PortInterfaceId,
+                    (PVOID *) OutPortInterface 
+                );
+        }
+
+        if (OutMiniportUnknown)
+        {
+            ntStatus = 
+                miniport->QueryInterface
+                ( 
+                    IID_IUnknown,
+                    (PVOID *)OutMiniportUnknown 
+                );
+        }
+
+    }
+
+    if (port)
+    {
+        port->Release();
+    }
+
+    if (miniport)
+    {
+        miniport->Release();
+    }
+
+    return ntStatus;
+} // InstallSubDevice
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP_(NTSTATUS)
+CAdapterCommon::UnregisterSubdevice
+(
+    _In_opt_   PUNKNOWN     UnknownPort
+)
+/*++
+
+Routine Description:
+
+  Unregisters and releases the specified subdevice.
+
+Arguments:
+
+  UnknownPort - Wave or topology port interface.
+
+Return Value:
+
+  NTSTATUS
+
+--*/
+{
+    PAGED_CODE();
+    DPF_ENTER(("[CAdapterCommon::UnregisterSubdevice]"));
+
+    ASSERT(m_pDeviceObject != NULL);
+    
+    NTSTATUS                ntStatus            = STATUS_SUCCESS;
+    PUNREGISTERSUBDEVICE    unregisterSubdevice = NULL;
+    
+    if (NULL == UnknownPort)
+    {
+        return ntStatus;
+    }
+
+    //
+    // Get the IUnregisterSubdevice interface.
+    //
+    ntStatus = UnknownPort->QueryInterface( 
+        IID_IUnregisterSubdevice,
+        (PVOID *)&unregisterSubdevice);
+
+    //
+    // Unregister the port object.
+    //
+    if (NT_SUCCESS(ntStatus))
+    {
+        ntStatus = unregisterSubdevice->UnregisterSubdevice(
+            m_pDeviceObject,
+            UnknownPort);
+
+        //
+        // Release the IUnregisterSubdevice interface.
+        //
+        unregisterSubdevice->Release();
+    }
+    
+    return ntStatus;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP_(NTSTATUS)
+CAdapterCommon::ConnectTopologies
+(
+    _In_ PUNKNOWN                   UnknownTopology,
+    _In_ PUNKNOWN                   UnknownWave,
+    _In_ PHYSICALCONNECTIONTABLE*   PhysicalConnections,
+    _In_ ULONG                      PhysicalConnectionCount
+)
+/*++
+
+Routine Description:
+
+  Connects the bridge pins between the wave and mixer topologies.
+
+Arguments:
+
+Return Value:
+
+  NTSTATUS
+
+--*/
+{
+    PAGED_CODE();
+    DPF_ENTER(("[CAdapterCommon::ConnectTopologies]"));
+    
+    ASSERT(m_pDeviceObject != NULL);
+    
+    NTSTATUS        ntStatus            = STATUS_SUCCESS;
+
+    //
+    // register wave <=> topology connections
+    // This will connect bridge pins of wave and topology
+    // miniports.
+    //
+    for (ULONG i = 0; i < PhysicalConnectionCount && NT_SUCCESS(ntStatus); i++)
+    {
+    
+        switch(PhysicalConnections[i].eType)
+        {
+            case CONNECTIONTYPE_TOPOLOGY_OUTPUT:
+                ntStatus =
+                    PcRegisterPhysicalConnection
+                    ( 
+                        m_pDeviceObject,
+                        UnknownTopology,
+                        PhysicalConnections[i].ulTopology,
+                        UnknownWave,
+                        PhysicalConnections[i].ulWave
+                    );
+                if (!NT_SUCCESS(ntStatus))
+                {
+                    DPF(D_TERSE, ("ConnectTopologies: PcRegisterPhysicalConnection(render) failed, 0x%x", ntStatus));
+                }
+                break;
+            case CONNECTIONTYPE_WAVE_OUTPUT:
+                ntStatus =
+                    PcRegisterPhysicalConnection
+                    ( 
+                        m_pDeviceObject,
+                        UnknownWave,
+                        PhysicalConnections[i].ulWave,
+                        UnknownTopology,
+                        PhysicalConnections[i].ulTopology
+                    );
+                if (!NT_SUCCESS(ntStatus))
+                {
+                    DPF(D_TERSE, ("ConnectTopologies: PcRegisterPhysicalConnection(capture) failed, 0x%x", ntStatus));
+                }
+                break;
+        }
+    }    
+
+    //
+    // Cleanup in case of error.
+    //
+    if (!NT_SUCCESS(ntStatus))
+    {
+        // disconnect all connections on error, ignore error code because not all
+        // connections may have been made
+        DisconnectTopologies(UnknownTopology, UnknownWave, PhysicalConnections, PhysicalConnectionCount);
+    }
+
+    return ntStatus;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP_(NTSTATUS)
+CAdapterCommon::DisconnectTopologies
+(
+    _In_ PUNKNOWN                   UnknownTopology,
+    _In_ PUNKNOWN                   UnknownWave,
+    _In_ PHYSICALCONNECTIONTABLE*   PhysicalConnections,
+    _In_ ULONG                      PhysicalConnectionCount
+)
+/*++
+
+Routine Description:
+
+  Disconnects the bridge pins between the wave and mixer topologies.
+
+Arguments:
+
+Return Value:
+
+  NTSTATUS
+
+--*/
+{
+    PAGED_CODE();
+    DPF_ENTER(("[CAdapterCommon::DisconnectTopologies]"));
+    
+    ASSERT(m_pDeviceObject != NULL);
+    
+    NTSTATUS                        ntStatus                        = STATUS_SUCCESS;
+    NTSTATUS                        ntStatus2                       = STATUS_SUCCESS;
+    PUNREGISTERPHYSICALCONNECTION   unregisterPhysicalConnection    = NULL;
+
+    //
+    // Get the IUnregisterPhysicalConnection interface
+    //
+    ntStatus = UnknownTopology->QueryInterface( 
+        IID_IUnregisterPhysicalConnection,
+        (PVOID *)&unregisterPhysicalConnection);
+    
+    if (NT_SUCCESS(ntStatus))
+    { 
+        for (ULONG i = 0; i < PhysicalConnectionCount; i++)
+        {
+            switch(PhysicalConnections[i].eType)
+            {
+                case CONNECTIONTYPE_TOPOLOGY_OUTPUT:
+                    ntStatus =
+                        unregisterPhysicalConnection->UnregisterPhysicalConnection(
+                            m_pDeviceObject,
+                            UnknownTopology,
+                            PhysicalConnections[i].ulTopology,
+                            UnknownWave,
+                            PhysicalConnections[i].ulWave
+                        );
+
+                    if (!NT_SUCCESS(ntStatus))
+                    {
+                        DPF(D_TERSE, ("DisconnectTopologies: UnregisterPhysicalConnection(render) failed, 0x%x", ntStatus));
+                    }
+                    break;
+                case CONNECTIONTYPE_WAVE_OUTPUT:
+                    ntStatus =
+                        unregisterPhysicalConnection->UnregisterPhysicalConnection(
+                            m_pDeviceObject,
+                            UnknownWave,
+                            PhysicalConnections[i].ulWave,
+                            UnknownTopology,
+                            PhysicalConnections[i].ulTopology
+                        );
+                    if (!NT_SUCCESS(ntStatus2))
+                    {
+                        DPF(D_TERSE, ("DisconnectTopologies: UnregisterPhysicalConnection(capture) failed, 0x%x", ntStatus2));
+                    }
+                    break;
+            }
+
+            // cache and return the first error encountered, as it's likely the most relevent
+            if (NT_SUCCESS(ntStatus))
+            {
+                ntStatus = ntStatus2;
+            }
+        }    
+    }
+    
+    //
+    // Release the IUnregisterPhysicalConnection interface.
+    //
+    SAFE_RELEASE(unregisterPhysicalConnection);
+
+    return ntStatus;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+CAdapterCommon::GetCachedSubdevice
+(
+    _In_ PWSTR Name,
+    _Out_opt_ PUNKNOWN *OutUnknownPort,
+    _Out_opt_ PUNKNOWN *OutUnknownMiniport
+)
+{
+    PAGED_CODE();
+    DPF_ENTER(("[CAdapterCommon::GetCachedSubdevice]"));
+
+    // search list, return interface to device if found, fail if not found
+    PLIST_ENTRY le = NULL;
+    BOOL bFound = FALSE;
+
+    for (le = m_SubdeviceCache.Flink; le != &m_SubdeviceCache && !bFound; le = le->Flink)
+    {
+        MINIPAIR_UNKNOWN *pRecord = CONTAINING_RECORD(le, MINIPAIR_UNKNOWN, ListEntry);
+
+        if (0 == wcscmp(Name, pRecord->Name))
+        {
+            if (OutUnknownPort)
+            {
+                *OutUnknownPort = pRecord->PortInterface;
+                (*OutUnknownPort)->AddRef();
+            }
+
+            if (OutUnknownMiniport)
+            {
+                *OutUnknownMiniport = pRecord->MiniportInterface;
+                (*OutUnknownMiniport)->AddRef();
+            }
+
+            bFound = TRUE;
+        }
+    }
+
+    return bFound?STATUS_SUCCESS:STATUS_OBJECT_NAME_NOT_FOUND;
+}
+
+
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+CAdapterCommon::CacheSubdevice
+(
+    _In_ PWSTR Name,
+    _In_ PUNKNOWN UnknownPort,
+    _In_ PUNKNOWN UnknownMiniport
+)
+{
+    PAGED_CODE();
+    DPF_ENTER(("[CAdapterCommon::CacheSubdevice]"));
+
+    // add the item with this name/interface to the list
+    NTSTATUS         ntStatus       = STATUS_SUCCESS;
+    MINIPAIR_UNKNOWN *pNewSubdevice = NULL;
+
+    pNewSubdevice = new(POOL_FLAG_NON_PAGED, MINADAPTER_POOLTAG) MINIPAIR_UNKNOWN;
+
+    if (!pNewSubdevice)
+    {
+        DPF(D_TERSE, ("Insufficient memory to cache subdevice"));
+        ntStatus = STATUS_INSUFFICIENT_RESOURCES;
+    }
+
+    if (NT_SUCCESS(ntStatus))
+    {
+        memset(pNewSubdevice, 0, sizeof(MINIPAIR_UNKNOWN));
+
+        ntStatus = RtlStringCchCopyW(pNewSubdevice->Name, SIZEOF_ARRAY(pNewSubdevice->Name), Name);
+    }
+
+    if (NT_SUCCESS(ntStatus))
+    {
+        pNewSubdevice->PortInterface = UnknownPort;
+        pNewSubdevice->PortInterface->AddRef();
+
+        pNewSubdevice->MiniportInterface = UnknownMiniport;
+        pNewSubdevice->MiniportInterface->AddRef();
+
+        // cache the IAdapterPowerManagement interface (if available) from the filter. Some endpoints,
+        // like FM and cellular, have their own power requirements that we must track. If this fails,
+        // it just means this filter doesn't do power management.
+        UnknownMiniport->QueryInterface(IID_IAdapterPowerManagement, (PVOID *)&(pNewSubdevice->PowerInterface));
+
+        InsertTailList(&m_SubdeviceCache, &pNewSubdevice->ListEntry);
+    }
+
+    if (!NT_SUCCESS(ntStatus))
+    {
+        if (pNewSubdevice)
+        {
+            delete pNewSubdevice;
+        }
+    }
+
+    return ntStatus;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+CAdapterCommon::RemoveCachedSubdevice
+(
+    _In_ PWSTR Name
+)
+{
+    PAGED_CODE();
+    DPF_ENTER(("[CAdapterCommon::RemoveCachedSubdevice]"));
+
+    // search list, remove the entry from the list
+
+    PLIST_ENTRY le = NULL;
+    BOOL bRemoved = FALSE;
+
+    for (le = m_SubdeviceCache.Flink; le != &m_SubdeviceCache && !bRemoved; le = le->Flink)
+    {
+        MINIPAIR_UNKNOWN *pRecord = CONTAINING_RECORD(le, MINIPAIR_UNKNOWN, ListEntry);
+
+        if (0 == wcscmp(Name, pRecord->Name))
+        {
+            SAFE_RELEASE(pRecord->PortInterface);
+            SAFE_RELEASE(pRecord->MiniportInterface);
+            SAFE_RELEASE(pRecord->PowerInterface);
+            memset(pRecord->Name, 0, sizeof(pRecord->Name));
+            RemoveEntryList(le);
+            bRemoved = TRUE;
+            delete pRecord;
+            break;
+        }
+    }
+
+    return bRemoved?STATUS_SUCCESS:STATUS_OBJECT_NAME_NOT_FOUND;
+}
+
+#pragma code_seg("PAGE")
+VOID
+CAdapterCommon::EmptySubdeviceCache()
+{
+    PAGED_CODE();
+    DPF_ENTER(("[CAdapterCommon::EmptySubdeviceCache]"));
+
+    while (!IsListEmpty(&m_SubdeviceCache))
+    {
+        PLIST_ENTRY le = RemoveHeadList(&m_SubdeviceCache);
+        MINIPAIR_UNKNOWN *pRecord = CONTAINING_RECORD(le, MINIPAIR_UNKNOWN, ListEntry);
+
+        SAFE_RELEASE(pRecord->PortInterface);
+        SAFE_RELEASE(pRecord->MiniportInterface);
+        SAFE_RELEASE(pRecord->PowerInterface);
+        memset(pRecord->Name, 0, sizeof(pRecord->Name));
+
+        delete pRecord;
+    }
+}
+
+#pragma code_seg("PAGE")
+VOID
+CAdapterCommon::Cleanup()
+{
+    PAGED_CODE();
+    DPF_ENTER(("[CAdapterCommon::Cleanup]"));
+    EmptySubdeviceCache();
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP_(NTSTATUS)
+CAdapterCommon::InstallEndpointFilters
+(
+    _In_opt_    PIRP                Irp, 
+    _In_        PENDPOINT_MINIPAIR  MiniportPair,
+    _In_opt_    PVOID               DeviceContext,
+    _Out_opt_   PUNKNOWN *          UnknownTopology,
+    _Out_opt_   PUNKNOWN *          UnknownWave,
+    _Out_opt_   PUNKNOWN *          UnknownMiniportTopology,
+    _Out_opt_   PUNKNOWN *          UnknownMiniportWave
+)
+{
+    PAGED_CODE();
+    DPF_ENTER(("[CAdapterCommon::InstallEndpointFilters]"));
+    
+    NTSTATUS            ntStatus            = STATUS_SUCCESS;
+    PUNKNOWN            unknownTopology     = NULL;
+    PUNKNOWN            unknownWave         = NULL;
+    BOOL                bTopologyCreated    = FALSE;
+    BOOL                bWaveCreated        = FALSE;
+    PUNKNOWN            unknownMiniTopo     = NULL;
+    PUNKNOWN            unknownMiniWave     = NULL;
+
+    // Initialize output optional parameters if needed
+    if (UnknownTopology)
+    {
+        *UnknownTopology = NULL;
+    }
+
+    if (UnknownWave)
+    {
+        *UnknownWave = NULL;
+    }
+  
+    if (UnknownMiniportTopology)
+    {
+        *UnknownMiniportTopology = NULL;
+    }
+
+    if (UnknownMiniportWave)
+    {
+        *UnknownMiniportWave = NULL;
+    }
+
+    ntStatus = GetCachedSubdevice(MiniportPair->TopoName, &unknownTopology, &unknownMiniTopo);
+    if (!NT_SUCCESS(ntStatus) || NULL == unknownTopology || NULL == unknownMiniTopo)
+    {
+        bTopologyCreated = TRUE;
+
+        // Install Simple Audio Sample topology miniport for the render endpoint.
+        //
+        ntStatus = InstallSubdevice(Irp,
+                                    MiniportPair->TopoName, // make sure this name matches with SIMPLEAUDIOSAMPLE.<TopoName>.szPname in the inf's [Strings] section
+                                    MiniportPair->TemplateTopoName,
+                                    CLSID_PortTopology,
+                                    CLSID_PortTopology, 
+                                    MiniportPair->TopoCreateCallback,
+                                    MiniportPair->TopoInterfacePropertyCount,
+                                    MiniportPair->TopoInterfaceProperties,
+                                    DeviceContext,
+                                    MiniportPair,
+                                    NULL,
+                                    IID_IPortTopology,
+                                    NULL,
+                                    &unknownTopology,
+                                    &unknownMiniTopo
+                                    );
+        if (NT_SUCCESS(ntStatus))
+        {
+            ntStatus = CacheSubdevice(MiniportPair->TopoName, unknownTopology, unknownMiniTopo);
+        }
+    }
+
+    ntStatus = GetCachedSubdevice(MiniportPair->WaveName, &unknownWave, &unknownMiniWave);
+    if (!NT_SUCCESS(ntStatus) || NULL == unknownWave || NULL == unknownMiniWave)
+    {
+        bWaveCreated = TRUE;
+
+        // Install Simple Audio Sample wave miniport for the render endpoint.
+        //
+        ntStatus = InstallSubdevice(Irp,
+                                    MiniportPair->WaveName, // make sure this name matches with SIMPLEAUDIOSAMPLE.<WaveName>.szPname in the inf's [Strings] section
+                                    MiniportPair->TemplateWaveName,
+                                    CLSID_PortWaveRT,
+                                    CLSID_PortWaveRT,   
+                                    MiniportPair->WaveCreateCallback,
+                                    MiniportPair->WaveInterfacePropertyCount,
+                                    MiniportPair->WaveInterfaceProperties,
+                                    DeviceContext,
+                                    MiniportPair,
+                                    NULL,
+                                    IID_IPortWaveRT,
+                                    NULL, 
+                                    &unknownWave,
+                                    &unknownMiniWave
+                                    );
+
+        if (NT_SUCCESS(ntStatus))
+        {
+            ntStatus = CacheSubdevice(MiniportPair->WaveName, unknownWave, unknownMiniWave);
+        }
+    }
+
+    if (unknownTopology && unknownWave)
+    {
+        //
+        // register wave <=> topology connections
+        // This will connect bridge pins of wave and topology
+        // miniports.
+        //
+        ntStatus = ConnectTopologies(
+            unknownTopology,
+            unknownWave,
+            MiniportPair->PhysicalConnections,
+            MiniportPair->PhysicalConnectionCount);
+    }
+
+    if (NT_SUCCESS(ntStatus))
+    {
+        //
+        // Set output parameters.
+        //
+        if (UnknownTopology != NULL && unknownTopology != NULL)
+        {
+            unknownTopology->AddRef();
+            *UnknownTopology = unknownTopology;
+        }
+        
+        if (UnknownWave != NULL && unknownWave != NULL)
+        {
+            unknownWave->AddRef();
+            *UnknownWave = unknownWave;
+        }
+        if (UnknownMiniportTopology != NULL && unknownMiniTopo != NULL)
+        {
+            unknownMiniTopo->AddRef();
+            *UnknownMiniportTopology = unknownMiniTopo;
+        }
+
+        if (UnknownMiniportWave != NULL && unknownMiniWave != NULL)
+        {
+            unknownMiniWave->AddRef();
+            *UnknownMiniportWave = unknownMiniWave;
+        }
+
+    }
+    else
+    {
+        if (bTopologyCreated && unknownTopology != NULL)
+        {
+            UnregisterSubdevice(unknownTopology);
+            RemoveCachedSubdevice(MiniportPair->TopoName);
+        }
+            
+        if (bWaveCreated && unknownWave != NULL)
+        {
+            UnregisterSubdevice(unknownWave);
+            RemoveCachedSubdevice(MiniportPair->WaveName);
+        }
+    }
+   
+    SAFE_RELEASE(unknownMiniTopo);
+    SAFE_RELEASE(unknownTopology);
+    SAFE_RELEASE(unknownMiniWave);
+    SAFE_RELEASE(unknownWave);
+
+    return ntStatus;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP_(NTSTATUS)
+CAdapterCommon::RemoveEndpointFilters
+(
+    _In_        PENDPOINT_MINIPAIR  MiniportPair,
+    _In_opt_    PUNKNOWN            UnknownTopology,
+    _In_opt_    PUNKNOWN            UnknownWave
+)
+{
+    PAGED_CODE();
+    DPF_ENTER(("[CAdapterCommon::RemoveEndpointFilters]"));
+    
+    NTSTATUS    ntStatus   = STATUS_SUCCESS;
+    
+    if (UnknownTopology != NULL && UnknownWave != NULL)
+    {
+        ntStatus = DisconnectTopologies(
+            UnknownTopology,
+            UnknownWave,
+            MiniportPair->PhysicalConnections,
+            MiniportPair->PhysicalConnectionCount);
+
+        if (!NT_SUCCESS(ntStatus))
+        {
+            DPF(D_VERBOSE, ("RemoveEndpointFilters: DisconnectTopologies failed: 0x%x", ntStatus));
+        }
+    }
+
+        
+    RemoveCachedSubdevice(MiniportPair->WaveName);
+
+    ntStatus = UnregisterSubdevice(UnknownWave);
+    if (!NT_SUCCESS(ntStatus))
+    {
+        DPF(D_VERBOSE, ("RemoveEndpointFilters: UnregisterSubdevice(wave) failed: 0x%x", ntStatus));
+    }
+
+    RemoveCachedSubdevice(MiniportPair->TopoName);
+
+    ntStatus = UnregisterSubdevice(UnknownTopology);
+    if (!NT_SUCCESS(ntStatus))
+    {
+        DPF(D_VERBOSE, ("RemoveEndpointFilters: UnregisterSubdevice(topology) failed: 0x%x", ntStatus));
+    }
+
+    //
+    // All Done.
+    //
+    ntStatus = STATUS_SUCCESS;
+    
+    return ntStatus;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP_(NTSTATUS)
+CAdapterCommon::GetFilters
+(
+    _In_        PENDPOINT_MINIPAIR  MiniportPair,
+    _Out_opt_   PUNKNOWN *          UnknownTopologyPort,
+    _Out_opt_   PUNKNOWN *          UnknownTopologyMiniport,
+    _Out_opt_   PUNKNOWN *          UnknownWavePort,
+    _Out_opt_   PUNKNOWN *          UnknownWaveMiniport
+)
+{
+    PAGED_CODE();
+    DPF_ENTER(("[CAdapterCommon::GetFilters]"));
+    
+    NTSTATUS    ntStatus   = STATUS_SUCCESS; 
+    PUNKNOWN            unknownTopologyPort     = NULL;
+    PUNKNOWN            unknownTopologyMiniport = NULL;
+    PUNKNOWN            unknownWavePort         = NULL;
+    PUNKNOWN            unknownWaveMiniport     = NULL;
+
+    // if the client requested the topology filter, find it and return it
+    if (UnknownTopologyPort != NULL || UnknownTopologyMiniport != NULL)
+    {
+        ntStatus = GetCachedSubdevice(MiniportPair->TopoName, &unknownTopologyPort, &unknownTopologyMiniport);
+        if (NT_SUCCESS(ntStatus))
+        {
+            if (UnknownTopologyPort)
+            {
+                *UnknownTopologyPort = unknownTopologyPort;
+            }
+
+            if (UnknownTopologyMiniport)
+            {
+                *UnknownTopologyMiniport = unknownTopologyMiniport;
+            }
+        }
+    }
+
+    // if the client requested the wave filter, find it and return it
+    if (NT_SUCCESS(ntStatus) && (UnknownWavePort != NULL || UnknownWaveMiniport != NULL))
+    {
+        ntStatus = GetCachedSubdevice(MiniportPair->WaveName, &unknownWavePort, &unknownWaveMiniport);
+        if (NT_SUCCESS(ntStatus))
+        {
+            if (UnknownWavePort)
+            {
+                *UnknownWavePort = unknownWavePort;
+            }
+
+            if (UnknownWaveMiniport)
+            {
+                *UnknownWaveMiniport = unknownWaveMiniport;
+            }
+        }
+    }
+
+    return ntStatus;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP_(NTSTATUS)
+CAdapterCommon::SetIdlePowerManagement
+(
+  _In_  PENDPOINT_MINIPAIR  MiniportPair,
+  _In_  BOOL bEnabled
+)
+{
+    PAGED_CODE();
+    DPF_ENTER(("[CAdapterCommon::SetIdlePowerManagement]"));
+
+    NTSTATUS      ntStatus   = STATUS_SUCCESS; 
+    IUnknown      *pUnknown = NULL;
+    PPORTCLSPOWER pPortClsPower = NULL;
+    // refcounting disable requests. Each miniport is responsible for calling this in pairs,
+    // disable on the first request to disable, enable on the last request to enable.
+
+    // make sure that we always call SetIdlePowerManagment using the IPortClsPower
+    // from the requesting port, so we don't cache a reference to a port
+    // indefinitely, preventing it from ever unloading.
+    ntStatus = GetFilters(MiniportPair, NULL, NULL, &pUnknown, NULL);
+    if (NT_SUCCESS(ntStatus))
+    {
+        ntStatus = 
+            pUnknown->QueryInterface
+            (
+                IID_IPortClsPower,
+                (PVOID*) &pPortClsPower
+            );
+    }
+
+    if (NT_SUCCESS(ntStatus))
+    {
+        if (bEnabled)
+        {
+            m_dwIdleRequests--;
+
+            if (0 == m_dwIdleRequests)
+            {
+                pPortClsPower->SetIdlePowerManagement(m_pDeviceObject, TRUE);
+            }
+        }
+        else
+        {
+            if (0 == m_dwIdleRequests)
+            {
+                pPortClsPower->SetIdlePowerManagement(m_pDeviceObject, FALSE);
+            }
+
+            m_dwIdleRequests++;
+        }
+    }
+
+    SAFE_RELEASE(pUnknown);
+    SAFE_RELEASE(pPortClsPower);
+
+    return ntStatus;
+}
+
+#pragma code_seg("PAGE")
+NTSTATUS
+CopyRegistryValues(HANDLE _hSourceKey, HANDLE _hDestinationKey)
+/*++
+
+Routine Description:
+
+  This method copies the registry values in _hSourceKey to _hDestinationKey.
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    NTSTATUS                    ntStatus = STATUS_SUCCESS;
+    PKEY_VALUE_FULL_INFORMATION kvFullInfo = NULL;
+    ULONG                       ulFullInfoLength = 0;
+    ULONG                       ulFullInfoResultLength = 0;
+    PWSTR                       pwstrKeyValueName = NULL;
+    UNICODE_STRING              strKeyValueName;
+    PAGED_CODE();
+    // Allocate the KEY_VALUE_FULL_INFORMATION structure
+    ulFullInfoLength = sizeof(KEY_VALUE_FULL_INFORMATION) + MAX_DEVICE_REG_KEY_LENGTH;
+    kvFullInfo = (PKEY_VALUE_FULL_INFORMATION)ExAllocatePool2(POOL_FLAG_NON_PAGED, ulFullInfoLength, MINADAPTER_POOLTAG);
+    IF_TRUE_ACTION_JUMP(kvFullInfo == NULL, ntStatus = STATUS_INSUFFICIENT_RESOURCES, Exit);
+
+    // Iterate over each value and copy it to the destination
+    for (UINT i = 0; NT_SUCCESS(ntStatus); i++)
+    {
+        // Enumerate the next value
+        ntStatus = ZwEnumerateValueKey(_hSourceKey, i, KeyValueFullInformation, kvFullInfo, ulFullInfoLength, &ulFullInfoResultLength);
+
+        // Jump out of this loop if there are no more values
+        IF_TRUE_ACTION_JUMP(ntStatus == STATUS_NO_MORE_ENTRIES, ntStatus = STATUS_SUCCESS, Exit);
+
+        // Handle incorrect buffer size
+        if (ntStatus == STATUS_BUFFER_TOO_SMALL || ntStatus == STATUS_BUFFER_OVERFLOW)
+        {
+            // Free and re-allocate the KEY_VALUE_FULL_INFORMATION structure with the correct size
+            ExFreePoolWithTag(kvFullInfo, MINADAPTER_POOLTAG);
+
+            ulFullInfoLength = ulFullInfoResultLength;
+
+            kvFullInfo = (PKEY_VALUE_FULL_INFORMATION)ExAllocatePool2(POOL_FLAG_NON_PAGED, ulFullInfoLength, MINADAPTER_POOLTAG);
+            IF_TRUE_ACTION_JUMP(kvFullInfo == NULL, ntStatus = STATUS_INSUFFICIENT_RESOURCES, loop_exit);
+
+            // Try to enumerate the current value again
+            ntStatus = ZwEnumerateValueKey(_hSourceKey, i, KeyValueFullInformation, kvFullInfo, ulFullInfoLength, &ulFullInfoResultLength);
+
+            // Jump out of this loop if there are no more values
+            IF_TRUE_ACTION_JUMP(ntStatus == STATUS_NO_MORE_ENTRIES, ntStatus = STATUS_SUCCESS, Exit);
+            IF_FAILED_JUMP(ntStatus, loop_exit);
+        }
+        else
+        {
+            IF_FAILED_JUMP(ntStatus, loop_exit);
+        }
+
+        // Allocate the key value name string
+        pwstrKeyValueName = (PWSTR)ExAllocatePool2(POOL_FLAG_NON_PAGED, kvFullInfo->NameLength + sizeof(WCHAR)*2, MINADAPTER_POOLTAG);
+        IF_TRUE_ACTION_JUMP(kvFullInfo == NULL, ntStatus = STATUS_INSUFFICIENT_RESOURCES, loop_exit);
+
+        // Copy the key value name from the full information struct
+        RtlStringCbCopyNW(pwstrKeyValueName, kvFullInfo->NameLength + sizeof(WCHAR)*2, kvFullInfo->Name, kvFullInfo->NameLength);
+
+        // Make sure the string is null terminated
+        pwstrKeyValueName[(kvFullInfo->NameLength) / sizeof(WCHAR)] = 0;
+
+        // Copy the key value name string to a UNICODE string
+        RtlInitUnicodeString(&strKeyValueName, pwstrKeyValueName);
+
+        // Write the key value from the source into the destination
+        ntStatus = ZwSetValueKey(_hDestinationKey, &strKeyValueName, 0, kvFullInfo->Type, (PVOID)((PUCHAR)kvFullInfo + kvFullInfo->DataOffset), kvFullInfo->DataLength);
+        IF_FAILED_JUMP(ntStatus, loop_exit);
+
+    loop_exit:
+        // Free the key value name string
+        if (pwstrKeyValueName)
+        {
+            ExFreePoolWithTag(pwstrKeyValueName, MINADAPTER_POOLTAG);
+        }
+
+        // Bail if anything failed
+        IF_FAILED_JUMP(ntStatus, Exit);
+    }
+
+Exit:
+    // Free the KEY_VALUE_FULL_INFORMATION structure
+    if (kvFullInfo)
+    {
+        ExFreePoolWithTag(kvFullInfo, MINADAPTER_POOLTAG);
+    }
+
+    return ntStatus;
+}
+
+NTSTATUS
+CopyRegistryKey(HANDLE _hSourceKey, HANDLE _hDestinationKey, BOOL _bOverwrite = FALSE)
+/*++
+
+Routine Description:
+
+  This method recursively copies the registry values in _hSourceKey to _hDestinationKey.
+  Set _bOverwrite to indicate whether the first level values are copied or not.
+  Normal use is to set false for the initial call, and then all sub paths will be copied.
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    NTSTATUS                ntStatus = STATUS_UNSUCCESSFUL;
+    PKEY_BASIC_INFORMATION  kBasicInfo = NULL;
+    ULONG                   ulBasicInfoLength = 0;
+    ULONG                   ulBasicInfoResultLength = 0;
+    ULONG                   ulDisposition = 0;
+    PWSTR                   pwstrKeyName = NULL;
+    UNICODE_STRING          strKeyName;
+    OBJECT_ATTRIBUTES       hCurrentSourceKeyAttributes;
+    OBJECT_ATTRIBUTES       hNewDestinationKeyAttributes;
+    HANDLE                  hCurrentSourceKey = NULL;
+    HANDLE                  hNewDestinationKey = NULL;
+    PAGED_CODE();
+    // Validate parameters
+    IF_TRUE_ACTION_JUMP(_hSourceKey == nullptr, ntStatus = STATUS_INVALID_PARAMETER, Exit);
+    IF_TRUE_ACTION_JUMP(_hDestinationKey == nullptr, ntStatus = STATUS_INVALID_PARAMETER, Exit);
+
+    // Allocate the KEY_BASIC_INFORMATION structure
+    ulBasicInfoLength = sizeof(KEY_BASIC_INFORMATION) + MAX_DEVICE_REG_KEY_LENGTH;
+    kBasicInfo = (PKEY_BASIC_INFORMATION)ExAllocatePool2(POOL_FLAG_NON_PAGED, ulBasicInfoLength, MINADAPTER_POOLTAG);
+    IF_TRUE_ACTION_JUMP(kBasicInfo == NULL, ntStatus = STATUS_INSUFFICIENT_RESOURCES, Exit);
+
+    ntStatus = STATUS_SUCCESS;
+    // Iterate over each key and copy it
+    for (UINT i = 0; NT_SUCCESS(ntStatus); i++)
+    {
+        // Enumerate the next key
+        ntStatus = ZwEnumerateKey(_hSourceKey, i, KeyBasicInformation, kBasicInfo, ulBasicInfoLength, &ulBasicInfoResultLength);
+
+        // Jump out of this loop if there are no more keys
+        IF_TRUE_ACTION_JUMP(ntStatus == STATUS_NO_MORE_ENTRIES, ntStatus = STATUS_SUCCESS, copy_values);
+
+        // Handle incorrect buffer size
+        if (ntStatus == STATUS_BUFFER_TOO_SMALL || ntStatus == STATUS_BUFFER_OVERFLOW)
+        {
+            // Free and re-allocate the KEY_BASIC_INFORMATION structure with the correct size.
+            ExFreePoolWithTag(kBasicInfo, MINADAPTER_POOLTAG);
+            ulBasicInfoLength = ulBasicInfoResultLength;
+            kBasicInfo = (PKEY_BASIC_INFORMATION)ExAllocatePool2(POOL_FLAG_NON_PAGED, ulBasicInfoLength, MINADAPTER_POOLTAG);
+            IF_TRUE_ACTION_JUMP(kBasicInfo == NULL, ntStatus = STATUS_INSUFFICIENT_RESOURCES, loop_exit);
+
+            // Try to enumerate the current key again.
+            ntStatus = ZwEnumerateKey(_hSourceKey, i, KeyBasicInformation, kBasicInfo, ulBasicInfoLength, &ulBasicInfoResultLength);
+
+            // Jump out of this loop if there are no more keys
+            IF_TRUE_ACTION_JUMP(ntStatus == STATUS_NO_MORE_ENTRIES, ntStatus = STATUS_SUCCESS, copy_values);
+            IF_FAILED_JUMP(ntStatus, loop_exit);
+        }
+        else
+        {
+            IF_FAILED_JUMP(ntStatus, loop_exit);
+        }
+
+        // Allocate the key name string 
+        pwstrKeyName = (PWSTR)ExAllocatePool2(POOL_FLAG_NON_PAGED, kBasicInfo->NameLength + sizeof(WCHAR), MINADAPTER_POOLTAG);
+        IF_TRUE_ACTION_JUMP(kBasicInfo == NULL, ntStatus = STATUS_INSUFFICIENT_RESOURCES, loop_exit);
+
+        // Copy the key name from the basic information struct
+        RtlStringCbCopyNW(pwstrKeyName, kBasicInfo->NameLength + sizeof(WCHAR), kBasicInfo->Name, kBasicInfo->NameLength);
+
+        // Make sure the string is null terminated
+        pwstrKeyName[(kBasicInfo->NameLength) / sizeof(WCHAR)] = 0;
+
+        // Copy the key name string to a UNICODE string
+        RtlInitUnicodeString(&strKeyName, pwstrKeyName);
+
+        // Initialize attributes to open the currently enumerated source key
+        InitializeObjectAttributes(&hCurrentSourceKeyAttributes, &strKeyName, OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE, _hSourceKey, NULL);
+
+        // Open the currently enumerated source key
+        ntStatus = ZwOpenKey(&hCurrentSourceKey, KEY_READ, &hCurrentSourceKeyAttributes);
+        IF_FAILED_ACTION_JUMP(ntStatus, ZwClose(hCurrentSourceKey), loop_exit);
+
+        // Initialize attributes to create the new destination key
+        InitializeObjectAttributes(&hNewDestinationKeyAttributes, &strKeyName, OBJ_KERNEL_HANDLE, _hDestinationKey, NULL);
+
+        // Create the key at the destination
+        ntStatus = ZwCreateKey(&hNewDestinationKey, KEY_WRITE, &hNewDestinationKeyAttributes, 0, NULL, REG_OPTION_NON_VOLATILE, &ulDisposition);
+        IF_FAILED_ACTION_JUMP(ntStatus, ZwClose(hCurrentSourceKey), loop_exit);
+
+        // Now copy the contents of the currently enumerated key to the destination
+        ntStatus = CopyRegistryKey(hCurrentSourceKey, hNewDestinationKey, TRUE);
+        IF_FAILED_JUMP(ntStatus, loop_exit);
+
+    loop_exit:
+        // Free the key name string
+        if (pwstrKeyName)
+        {
+            ExFreePoolWithTag(pwstrKeyName, MINADAPTER_POOLTAG);
+        }
+
+        // Close the current source key
+        if (hCurrentSourceKey)
+        {
+            ZwClose(hCurrentSourceKey);
+        }
+
+        // Close the new destination key
+        if (hNewDestinationKey)
+        {
+            ZwClose(hNewDestinationKey);
+        }
+
+        // Bail if anything failed
+        IF_FAILED_JUMP(ntStatus, Exit);
+    }
+
+copy_values:
+    // Copy the values 
+    if (_bOverwrite)
+    {
+        ntStatus = CopyRegistryValues(_hSourceKey, _hDestinationKey);
+        IF_FAILED_JUMP(ntStatus, Exit);
+    }
+
+Exit:
+    // Free the basic information structure
+    if (kBasicInfo)
+    {
+        ExFreePoolWithTag(kBasicInfo, MINADAPTER_POOLTAG);
+    }
+    return ntStatus;
+}
+
+
+NTSTATUS CAdapterCommon::MigrateDeviceInterfaceTemplateParameters
+(
+    _In_ PUNICODE_STRING    SymbolicLinkName,
+    _In_opt_ PCWSTR         TemplateReferenceString
+)
+/*++
+
+Routine Description:
+
+  This method copies all of the properties from the template interface,
+  which is specified in the inf, to the actual interface being used which
+  may be dynamically generated at run time. This allows for a driver 
+  to reuse a single inf entry for multiple audio endpoints. The primary 
+  purpose for this is to allow for sideband audio endpoints to dynamically
+  generate the reference string at run time, tied to the peripheral connected,
+  while still having a simple static inf entry for setting up apo's or other 
+  parameters.
+
+  For example, if you have an interface in your inf defined with reference string
+  "SpeakerWave". At runtime you could generate "SpeakerWave-1234ABCDE", and specify
+  "SpeakerWave" as the template name. When "SpeakerWave-1234ABCDE" is installed
+  we will copy all of the parameters that were specified in the inf for "SpeakerWave"
+  over to "SpeakerWave-1234ABCDE". You simply need to specify "SpeakerWave" as the
+  "TemplateName" in the ENDPOINT_MINIPAIRS.
+
+  By default, the first level of registry keys are not copied. Only the 2nd level and
+  deeper are copied. This way the friendly name and other PNP properties will not
+  be modified, but the EP and FX properties will be copied.
+  
+Return Value:
+
+  NT status code.
+
+--*/
+
+{
+    NTSTATUS            ntStatus = STATUS_SUCCESS;
+    HANDLE              hDeviceInterfaceParametersKey(NULL);
+    HANDLE              hTemplateDeviceInterfaceParametersKey(NULL);
+    UNICODE_STRING      TemplateSymbolicLinkName;
+    UNICODE_STRING      referenceString;
+
+    RtlInitUnicodeString(&TemplateSymbolicLinkName, NULL);
+    RtlInitUnicodeString(&referenceString, TemplateReferenceString);
+
+    //
+    // Register an audio interface if not already present for the template interface, so we can access
+    // the registry path. If it's already registered, this simply returns the symbolic link name. 
+    // No need to unregister it (there is no mechanism to), and we'll never make it active.
+    //
+    ntStatus = IoRegisterDeviceInterface(
+        GetPhysicalDeviceObject(),
+        &KSCATEGORY_AUDIO,
+        &referenceString,
+        &TemplateSymbolicLinkName);
+
+    // Open the template device interface's registry key path
+    ntStatus = IoOpenDeviceInterfaceRegistryKey(&TemplateSymbolicLinkName, GENERIC_READ, &hTemplateDeviceInterfaceParametersKey);
+    IF_FAILED_JUMP(ntStatus, Exit);
+
+    // Open the new device interface's registry key path that we plan to activate
+    ntStatus = IoOpenDeviceInterfaceRegistryKey(SymbolicLinkName, GENERIC_WRITE, &hDeviceInterfaceParametersKey);
+    IF_FAILED_JUMP(ntStatus, Exit);
+
+    // Copy the template device parameters key to the device interface key
+    ntStatus = CopyRegistryKey(hTemplateDeviceInterfaceParametersKey, hDeviceInterfaceParametersKey);
+    IF_FAILED_JUMP(ntStatus, Exit);
+
+Exit:
+    RtlFreeUnicodeString(&TemplateSymbolicLinkName);
+
+    if (hTemplateDeviceInterfaceParametersKey)
+    {
+        ZwClose(hTemplateDeviceInterfaceParametersKey);
+    }
+
+    if (hDeviceInterfaceParametersKey)
+    {
+        ZwClose(hDeviceInterfaceParametersKey);
+    }
+
+    return ntStatus;
+}
diff --git a/audio/simpleaudiosample/Source/Main/mintopo.cpp b/audio/simpleaudiosample/Source/Main/mintopo.cpp
new file mode 100644
index 00000000..6ab1624f
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Main/mintopo.cpp
@@ -0,0 +1,557 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    mintopo.cpp
+
+Abstract:
+
+    Implementation of topology miniport.
+--*/
+
+#pragma warning (disable : 4127)
+
+#include "definitions.h"
+#include "endpoints.h"
+#include "minwavert.h"
+#include "mintopo.h"
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+CreateMiniportTopologySimpleAudioSample
+( 
+    _Out_           PUNKNOWN *                              Unknown,
+    _In_            REFCLSID,
+    _In_opt_        PUNKNOWN                                UnknownOuter,
+    _In_            POOL_FLAGS                              PoolFlags, 
+    _In_            PUNKNOWN                                UnknownAdapter,
+    _In_opt_        PVOID                                   DeviceContext,
+    _In_            PENDPOINT_MINIPAIR                      MiniportPair
+)
+/*++
+
+Routine Description:
+
+    Creates a new topology miniport.
+
+Arguments:
+
+  Unknown - 
+
+  RefclsId -
+
+  PoolType -
+  
+  UnknownOuter -
+
+  DeviceContext - 
+  
+  MiniportPair -  
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    UNREFERENCED_PARAMETER(UnknownAdapter);
+
+    ASSERT(Unknown);
+    ASSERT(MiniportPair);
+
+    CMiniportTopology *obj = 
+        new (PoolFlags, MINWAVERT_POOLTAG) 
+            CMiniportTopology( UnknownOuter,
+                               MiniportPair->TopoDescriptor,
+                               MiniportPair->DeviceMaxChannels,
+                               MiniportPair->DeviceType, 
+                               DeviceContext );
+    if (NULL == obj)
+    {
+        return STATUS_INSUFFICIENT_RESOURCES;
+    }
+    
+    obj->AddRef();
+    *Unknown = reinterpret_cast<IUnknown*>(obj);
+
+    return STATUS_SUCCESS;
+} // CreateMiniportTopologySimpleAudioSample
+
+//=============================================================================
+#pragma code_seg("PAGE")
+CMiniportTopology::~CMiniportTopology
+(
+    void
+)
+/*++
+
+Routine Description:
+
+  Topology miniport destructor
+
+Arguments:
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    DPF_ENTER(("[CMiniportTopology::~CMiniportTopology]"));
+} // ~CMiniportTopology
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+CMiniportTopology::DataRangeIntersection
+( 
+    _In_        ULONG                   PinId,
+    _In_        PKSDATARANGE            ClientDataRange,
+    _In_        PKSDATARANGE            MyDataRange,
+    _In_        ULONG                   OutputBufferLength,
+    _Out_writes_bytes_to_opt_(OutputBufferLength, *ResultantFormatLength)
+                PVOID                   ResultantFormat,
+    _Out_       PULONG                  ResultantFormatLength 
+)
+/*++
+
+Routine Description:
+
+  The DataRangeIntersection function determines the highest quality 
+  intersection of two data ranges.
+
+Arguments:
+
+  PinId - Pin for which data intersection is being determined. 
+
+  ClientDataRange - Pointer to KSDATARANGE structure which contains the data range 
+                    submitted by client in the data range intersection property 
+                    request. 
+
+  MyDataRange - Pin's data range to be compared with client's data range. 
+
+  OutputBufferLength - Size of the buffer pointed to by the resultant format 
+                       parameter. 
+
+  ResultantFormat - Pointer to value where the resultant format should be 
+                    returned. 
+
+  ResultantFormatLength - Actual length of the resultant format that is placed 
+                          at ResultantFormat. This should be less than or equal 
+                          to OutputBufferLength. 
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    return 
+        CMiniportTopologySimpleAudioSample::DataRangeIntersection
+        (
+            PinId,
+            ClientDataRange,
+            MyDataRange,
+            OutputBufferLength,
+            ResultantFormat,
+            ResultantFormatLength
+        );
+} // DataRangeIntersection
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP
+CMiniportTopology::GetDescription
+( 
+    _Out_ PPCFILTER_DESCRIPTOR *  OutFilterDescriptor 
+)
+/*++
+
+Routine Description:
+
+  The GetDescription function gets a pointer to a filter description. 
+  It provides a location to deposit a pointer in miniport's description 
+  structure. This is the placeholder for the FromNode or ToNode fields in 
+  connections which describe connections to the filter's pins. 
+
+Arguments:
+
+  OutFilterDescriptor - Pointer to the filter description. 
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    ASSERT(OutFilterDescriptor);
+
+    return CMiniportTopologySimpleAudioSample::GetDescription(OutFilterDescriptor);        
+} // GetDescription
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP
+CMiniportTopology::Init
+( 
+    _In_ PUNKNOWN                 UnknownAdapter,
+    _In_ PRESOURCELIST            ResourceList,
+    _In_ PPORTTOPOLOGY            Port_ 
+)
+/*++
+
+Routine Description:
+
+  The Init function initializes the miniport. Callers of this function 
+  should run at IRQL PASSIVE_LEVEL
+
+Arguments:
+
+  UnknownAdapter - A pointer to the Iuknown interface of the adapter object. 
+
+  ResourceList - Pointer to the resource list to be supplied to the miniport 
+                 during initialization. The port driver is free to examine the 
+                 contents of the ResourceList. The port driver will not be 
+                 modify the ResourceList contents. 
+
+  Port - Pointer to the topology port object that is linked with this miniport. 
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    UNREFERENCED_PARAMETER(ResourceList);
+
+    PAGED_CODE();
+
+    ASSERT(UnknownAdapter);
+    ASSERT(Port_);
+
+    DPF_ENTER(("[CMiniportTopology::Init]"));
+
+    NTSTATUS                    ntStatus;
+
+    ntStatus = 
+        CMiniportTopologySimpleAudioSample::Init
+        (
+            UnknownAdapter,
+            Port_
+        );
+
+    IF_FAILED_ACTION_JUMP(
+        ntStatus,
+        DPF(D_ERROR, ("Init: CMiniportTopologySimpleAudioSample::Init failed, 0x%x", ntStatus)),
+        Done);
+
+Done:
+    return ntStatus;
+} // Init
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP
+CMiniportTopology::NonDelegatingQueryInterface
+( 
+    _In_ REFIID                  Interface,
+    _COM_Outptr_ PVOID      * Object 
+)
+/*++
+
+Routine Description:
+
+  QueryInterface for MiniportTopology
+
+Arguments:
+
+  Interface - GUID of the interface
+
+  Object - interface object to be returned.
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    ASSERT(Object);
+
+    if (IsEqualGUIDAligned(Interface, IID_IUnknown))
+    {
+        *Object = PVOID(PUNKNOWN(this));
+    }
+    else if (IsEqualGUIDAligned(Interface, IID_IMiniport))
+    {
+        *Object = PVOID(PMINIPORT(this));
+    }
+    else if (IsEqualGUIDAligned(Interface, IID_IMiniportTopology))
+    {
+        *Object = PVOID(PMINIPORTTOPOLOGY(this));
+    }
+    else
+    {
+        *Object = NULL;
+    }
+
+    if (*Object)
+    {
+        // We reference the interface for the caller.
+        PUNKNOWN(*Object)->AddRef();
+        return(STATUS_SUCCESS);
+    }
+
+    return(STATUS_INVALID_PARAMETER);
+} // NonDelegatingQueryInterface
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+CMiniportTopology::PropertyHandlerJackDescription
+( 
+    _In_        PPCPROPERTY_REQUEST                      PropertyRequest,
+    _In_        ULONG                                    cJackDescriptions,
+    _In_reads_(cJackDescriptions) PKSJACK_DESCRIPTION *  JackDescriptions
+)
+/*++
+
+Routine Description:
+
+  Handles ( KSPROPSETID_Jack, KSPROPERTY_JACK_DESCRIPTION )
+
+Arguments:
+
+  PropertyRequest       - 
+  cJackDescriptions     - # of elements in the jack descriptions array. 
+  JackDescriptions      - Array of jack descriptions pointers. 
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    ASSERT(PropertyRequest);
+
+    DPF_ENTER(("[PropertyHandlerJackDescription]"));
+
+    NTSTATUS ntStatus = STATUS_INVALID_DEVICE_REQUEST;
+    ULONG    nPinId = (ULONG)-1;
+
+    if (PropertyRequest->InstanceSize >= sizeof(ULONG))
+    {
+        nPinId = *(PULONG(PropertyRequest->Instance));
+
+        if ((nPinId < cJackDescriptions) && (JackDescriptions[nPinId] != NULL))
+        {
+            if (PropertyRequest->Verb & KSPROPERTY_TYPE_BASICSUPPORT)
+            {
+                ntStatus = 
+                    PropertyHandler_BasicSupport
+                    (
+                        PropertyRequest,
+                        KSPROPERTY_TYPE_BASICSUPPORT | KSPROPERTY_TYPE_GET,
+                        VT_ILLEGAL
+                    );
+            }
+            else
+            {
+                ULONG cbNeeded = sizeof(KSMULTIPLE_ITEM) + sizeof(KSJACK_DESCRIPTION);
+
+                if (PropertyRequest->ValueSize == 0)
+                {
+                    PropertyRequest->ValueSize = cbNeeded;
+                    ntStatus = STATUS_BUFFER_OVERFLOW;
+                }
+                else if (PropertyRequest->ValueSize < cbNeeded)
+                {
+                    ntStatus = STATUS_BUFFER_TOO_SMALL;
+                }
+                else
+                {
+                    if (PropertyRequest->Verb & KSPROPERTY_TYPE_GET)
+                    {
+                        PKSMULTIPLE_ITEM pMI = (PKSMULTIPLE_ITEM)PropertyRequest->Value;
+                        PKSJACK_DESCRIPTION pDesc = (PKSJACK_DESCRIPTION)(pMI+1);
+
+                        pMI->Size = cbNeeded;
+                        pMI->Count = 1;
+
+                        RtlCopyMemory(pDesc, JackDescriptions[nPinId], sizeof(KSJACK_DESCRIPTION));
+                        ntStatus = STATUS_SUCCESS;
+                    }
+                }
+            }
+        }
+    }
+
+    return ntStatus;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+CMiniportTopology::PropertyHandlerJackDescription2
+( 
+    _In_        PPCPROPERTY_REQUEST                      PropertyRequest,
+    _In_        ULONG                                    cJackDescriptions,
+    _In_reads_(cJackDescriptions) PKSJACK_DESCRIPTION *  JackDescriptions,
+    _In_        DWORD                                    JackCapabilities
+)
+/*++
+
+Routine Description:
+
+  Handles ( KSPROPSETID_Jack, KSPROPERTY_JACK_DESCRIPTION2 )
+
+Arguments:
+
+  PropertyRequest       - 
+  cJackDescriptions     - # of elements in the jack descriptions array. 
+  JackDescriptions      - Array of jack descriptions pointers. 
+  JackCapabilities      - Jack capabilities flags.
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    ASSERT(PropertyRequest);
+
+    DPF_ENTER(("[PropertyHandlerJackDescription2]"));
+
+    NTSTATUS ntStatus = STATUS_INVALID_DEVICE_REQUEST;
+    ULONG    nPinId = (ULONG)-1;
+
+    if (PropertyRequest->InstanceSize >= sizeof(ULONG))
+    {
+        nPinId = *(PULONG(PropertyRequest->Instance));
+
+        if ((nPinId < cJackDescriptions) && (JackDescriptions[nPinId] != NULL))
+        {
+            if (PropertyRequest->Verb & KSPROPERTY_TYPE_BASICSUPPORT)
+            {
+                ntStatus = 
+                    PropertyHandler_BasicSupport
+                    (
+                        PropertyRequest,
+                        KSPROPERTY_TYPE_BASICSUPPORT | KSPROPERTY_TYPE_GET,
+                        VT_ILLEGAL
+                    );
+            }
+            else
+            {
+                ULONG cbNeeded = sizeof(KSMULTIPLE_ITEM) + sizeof(KSJACK_DESCRIPTION2);
+
+                if (PropertyRequest->ValueSize == 0)
+                {
+                    PropertyRequest->ValueSize = cbNeeded;
+                    ntStatus = STATUS_BUFFER_OVERFLOW;
+                }
+                else if (PropertyRequest->ValueSize < cbNeeded)
+                {
+                    ntStatus = STATUS_BUFFER_TOO_SMALL;
+                }
+                else
+                {
+                    if (PropertyRequest->Verb & KSPROPERTY_TYPE_GET)
+                    {
+                        PKSMULTIPLE_ITEM pMI = (PKSMULTIPLE_ITEM)PropertyRequest->Value;
+                        PKSJACK_DESCRIPTION2 pDesc = (PKSJACK_DESCRIPTION2)(pMI+1);
+
+                        pMI->Size = cbNeeded;
+                        pMI->Count = 1;
+                        
+                        RtlZeroMemory(pDesc, sizeof(KSJACK_DESCRIPTION2));
+
+                        //
+                        // Specifies the lower 16 bits of the DWORD parameter. This parameter indicates whether 
+                        // the jack is currently active, streaming, idle, or hardware not ready.
+                        //
+                        pDesc->DeviceStateInfo = 0;
+
+                        //
+                        // From MSDN:
+                        // "If an audio device lacks jack presence detection, the IsConnected member of
+                        // the KSJACK_DESCRIPTION structure must always be set to TRUE. To remove the 
+                        // ambiguity that results from this dual meaning of the TRUE value for IsConnected, 
+                        // a client application can call IKsJackDescription2::GetJackDescription2 to read 
+                        // the JackCapabilities flag of the KSJACK_DESCRIPTION2 structure. If this flag has
+                        // the JACKDESC2_PRESENCE_DETECT_CAPABILITY bit set, it indicates that the endpoint 
+                        // does in fact support jack presence detection. In that case, the return value of 
+                        // the IsConnected member can be interpreted to accurately reflect the insertion status
+                        // of the jack."
+                        //
+                        // Bit definitions:
+                        // 0x00000001 - JACKDESC2_PRESENCE_DETECT_CAPABILITY
+                        // 0x00000002 - JACKDESC2_DYNAMIC_FORMAT_CHANGE_CAPABILITY 
+                        //
+                        pDesc->JackCapabilities = JackCapabilities;
+
+                        ntStatus = STATUS_SUCCESS;
+                    }
+                }
+            }
+        }
+    }
+
+    return ntStatus;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+PropertyHandler_Topology
+( 
+    _In_ PPCPROPERTY_REQUEST      PropertyRequest 
+)
+/*++
+
+Routine Description:
+
+  Redirects property request to miniport object
+
+Arguments:
+
+  PropertyRequest - 
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    ASSERT(PropertyRequest);
+
+    DPF_ENTER(("[PropertyHandler_Topology]"));
+
+    // PropertryRequest structure is filled by portcls. 
+    // MajorTarget is a pointer to miniport object for miniports.
+    //
+    return 
+        ((PCMiniportTopology)
+        (PropertyRequest->MajorTarget))->PropertyHandlerGeneric
+                    (
+                        PropertyRequest
+                    );
+} // PropertyHandler_Topology
diff --git a/audio/simpleaudiosample/Source/Main/minwavert.cpp b/audio/simpleaudiosample/Source/Main/minwavert.cpp
new file mode 100644
index 00000000..1d92073d
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Main/minwavert.cpp
@@ -0,0 +1,1683 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    minwavert.cpp
+
+Abstract:
+
+    Implementation of wavert miniport.
+--*/
+
+#pragma warning (disable : 4127)
+
+#include "definitions.h"
+#include <limits.h>
+#include "endpoints.h"
+#include "minwavert.h"
+#include "minwavertstream.h"
+#include "micarraywavtable.h"
+
+#define EFFECTS_LIST_COUNT 2
+
+//=============================================================================
+// CMiniportWaveRT
+//=============================================================================
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+CreateMiniportWaveRTSimpleAudioSample
+( 
+    _Out_           PUNKNOWN                              * Unknown,
+    _In_            REFCLSID,
+    _In_opt_        PUNKNOWN                                UnknownOuter,
+    _In_            POOL_FLAGS                              PoolFlags,
+    _In_            PUNKNOWN                                UnknownAdapter,
+    _In_opt_        PVOID                                   DeviceContext,
+    _In_            PENDPOINT_MINIPAIR                      MiniportPair
+)
+/*++
+
+Routine Description:
+
+  Create the wavert miniport.
+
+Arguments:
+
+  Unknown - 
+
+  RefClsId -
+
+  UnknownOuter -
+
+  PoolType -
+
+  UnkownAdapter -
+
+  DeviceContext -
+
+  MiniportPair -
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    UNREFERENCED_PARAMETER(UnknownOuter);
+
+    PAGED_CODE();
+
+    ASSERT(Unknown);
+    ASSERT(MiniportPair);
+
+    CMiniportWaveRT *obj = new (PoolFlags, MINWAVERT_POOLTAG) CMiniportWaveRT
+                                                             (
+                                                                UnknownAdapter,
+                                                                MiniportPair,
+                                                                DeviceContext
+                                                             );
+    if (NULL == obj)
+    {
+        return STATUS_INSUFFICIENT_RESOURCES;
+    }
+    
+    obj->AddRef();
+    *Unknown = reinterpret_cast<IUnknown*>(obj);
+
+    return STATUS_SUCCESS;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+CMiniportWaveRT::~CMiniportWaveRT
+( 
+    void 
+)
+/*++
+
+Routine Description:
+
+  Destructor for wavert miniport
+
+Arguments:
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    DPF_ENTER(("[CMiniportWaveRT::~CMiniportWaveRT]"));
+
+    if (m_pDeviceFormat)
+    {
+        ExFreePoolWithTag( m_pDeviceFormat, MINWAVERT_POOLTAG );
+        m_pDeviceFormat = NULL;
+    }
+
+    if (m_pMixFormat)
+    {
+        ExFreePoolWithTag( m_pMixFormat, MINWAVERT_POOLTAG );
+        m_pMixFormat = NULL;
+    }
+
+    if (m_pbMuted)
+    {
+        ExFreePoolWithTag(m_pbMuted, MINWAVERT_POOLTAG);
+        m_pbMuted = NULL;
+    }
+
+    if (m_plVolumeLevel)
+    {
+        ExFreePoolWithTag(m_plVolumeLevel, MINWAVERT_POOLTAG);
+        m_plVolumeLevel = NULL;
+    }
+
+    if (m_pDrmPort)
+    {
+        m_pDrmPort->Release();
+        m_pDrmPort = NULL;
+    }
+
+    if (m_pPortEvents)
+    {
+        m_pPortEvents->Release();
+        m_pPortEvents = NULL;
+    }
+    
+    if (m_SystemStreams)
+    {
+        ExFreePoolWithTag( m_SystemStreams, MINWAVERT_POOLTAG );
+        m_SystemStreams = NULL;
+    }
+
+} // ~CMiniportWaveRT
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP_(NTSTATUS)
+CMiniportWaveRT::DataRangeIntersection
+( 
+    _In_        ULONG                       PinId,
+    _In_        PKSDATARANGE                ClientDataRange,
+    _In_        PKSDATARANGE                MyDataRange,
+    _In_        ULONG                       OutputBufferLength,
+    _Out_writes_bytes_to_opt_(OutputBufferLength, *ResultantFormatLength)
+                PVOID                       ResultantFormat,
+    _Out_       PULONG                      ResultantFormatLength 
+)
+/*++
+
+Routine Description:
+
+  The DataRangeIntersection function determines the highest quality 
+  intersection of two data ranges.
+
+  This sample just sets the ResultantFormat to be the only supported
+  format for the MicArray endpoint.
+
+Arguments:
+
+  PinId -           Pin for which data intersection is being determined. 
+
+  ClientDataRange - Pointer to KSDATARANGE structure which contains the data 
+                    range submitted by client in the data range intersection 
+                    property request. 
+
+  MyDataRange -         Pin's data range to be compared with client's data 
+                        range. In this case we actually ignore our own data 
+                        range, because we know that we only support one range.
+
+  OutputBufferLength -  Size of the buffer pointed to by the resultant format 
+                        parameter. 
+
+  ResultantFormat -     Pointer to value where the resultant format should be 
+                        returned. 
+
+  ResultantFormatLength -   Actual length of the resultant format placed in 
+                            ResultantFormat. This should be less than or equal 
+                            to OutputBufferLength. 
+
+  Return Value:
+
+    NT status code.
+
+--*/
+{
+    UNREFERENCED_PARAMETER(PinId);
+
+    ULONG                   requiredSize;
+
+    PAGED_CODE();
+
+    if (!IsEqualGUIDAligned(ClientDataRange->Specifier, KSDATAFORMAT_SPECIFIER_WAVEFORMATEX))
+    {
+        return STATUS_NOT_IMPLEMENTED;
+    }
+
+    //If called for the mic array pin, set ResultantFormat to be the endpoint's only supported format.
+    //Otherwise, allow the class handler to set ResultantFormat.  
+    if ((this->m_DeviceType) == eMicArrayDevice1)
+    {
+        requiredSize = sizeof(KSDATAFORMAT_WAVEFORMATEXTENSIBLE);
+
+        //
+        // Validate return buffer size, if the request is only for the
+        // size of the resultant structure, return it now before
+        // returning other types of errors.
+        //
+        if (!OutputBufferLength)
+        {
+            *ResultantFormatLength = requiredSize;
+            return STATUS_BUFFER_OVERFLOW;
+        }
+        else if (OutputBufferLength < requiredSize)
+        {
+            return STATUS_BUFFER_TOO_SMALL;
+        }
+
+        //Set ResultantFormat to be the only supported format for the MicArray endpoint. 
+        PKSDATAFORMAT_WAVEFORMATEXTENSIBLE resultantFormat;
+        resultantFormat = (PKSDATAFORMAT_WAVEFORMATEXTENSIBLE)ResultantFormat;
+        *resultantFormat = *MicArrayPinSupportedDeviceFormats;
+        *ResultantFormatLength = requiredSize;
+
+        return STATUS_SUCCESS;
+    }
+    else
+    {
+        requiredSize = sizeof(KSDATAFORMAT_WAVEFORMATEX);
+
+        //
+        // Validate return buffer size, if the request is only for the
+        // size of the resultant structure, return it now before
+        // returning other types of errors.
+        //
+        if (!OutputBufferLength)
+        {
+            *ResultantFormatLength = requiredSize;
+            return STATUS_BUFFER_OVERFLOW;
+        }
+        else if (OutputBufferLength < requiredSize)
+        {
+            return STATUS_BUFFER_TOO_SMALL;
+        }
+
+        // Verify channel count is supported. This routine assumes a separate data
+        // range for each supported channel count.
+        if (((PKSDATARANGE_AUDIO)MyDataRange)->MaximumChannels != ((PKSDATARANGE_AUDIO)ClientDataRange)->MaximumChannels)
+        {
+            return STATUS_NO_MATCH;
+        }
+
+        //
+        // Ok, let the class handler do the rest.
+        //
+        return STATUS_NOT_IMPLEMENTED;
+    }
+
+} // DataRangeIntersection
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP_(NTSTATUS)
+CMiniportWaveRT::GetDescription
+( 
+    _Out_ PPCFILTER_DESCRIPTOR * OutFilterDescriptor 
+)
+/*++
+
+Routine Description:
+
+  The GetDescription function gets a pointer to a filter description. 
+  It provides a location to deposit a pointer in miniport's description 
+  structure.
+
+Arguments:
+
+  OutFilterDescriptor - Pointer to the filter description. 
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    ASSERT(OutFilterDescriptor);
+
+    *OutFilterDescriptor = &m_FilterDesc;
+
+    return STATUS_SUCCESS;
+} // GetDescription
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP_(NTSTATUS)
+CMiniportWaveRT::Init
+( 
+    _In_  PUNKNOWN                UnknownAdapter_,
+    _In_  PRESOURCELIST           ResourceList_,
+    _In_  PPORTWAVERT             Port_ 
+)
+/*++
+
+Routine Description:
+
+  The Init function initializes the miniport. Callers of this function 
+  should run at IRQL PASSIVE_LEVEL
+
+Arguments:
+
+  UnknownAdapter - A pointer to the Iuknown interface of the adapter object. 
+
+  ResourceList - Pointer to the resource list to be supplied to the miniport 
+                 during initialization. The port driver is free to examine the 
+                 contents of the ResourceList. The port driver will not be 
+                 modify the ResourceList contents. 
+
+  Port - Pointer to the topology port object that is linked with this miniport. 
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    UNREFERENCED_PARAMETER(UnknownAdapter_);
+    UNREFERENCED_PARAMETER(ResourceList_);
+    UNREFERENCED_PARAMETER(Port_);
+    PAGED_CODE();
+
+    ASSERT(UnknownAdapter_);
+    ASSERT(Port_);
+
+    DPF_ENTER(("[CMiniportWaveRT::Init]"));
+
+    NTSTATUS ntStatus = STATUS_SUCCESS;
+    size_t   size;
+
+    //
+    // Init class data members
+    //
+    m_ulSystemAllocated                 = 0;
+    m_SystemStreams                     = NULL;
+    m_bGfxEnabled                       = FALSE;
+    m_pMixFormat                        = NULL;
+    m_pDeviceFormat                     = NULL;
+    m_ulMixDrmContentId                 = 0;
+    m_pbMuted = NULL;
+    m_plVolumeLevel = NULL;
+    RtlZeroMemory(&m_MixDrmRights, sizeof(m_MixDrmRights));
+
+    //
+    // Init the audio-engine used by the render devices.
+    //
+    if (IsRenderDevice())
+    {
+        if (m_ulMaxSystemStreams == 0 )
+        {
+            return STATUS_INVALID_DEVICE_STATE;
+        }
+            
+        // System streams.
+        size = sizeof(PCMiniportWaveRTStream) * m_ulMaxSystemStreams;
+        m_SystemStreams = (PCMiniportWaveRTStream *)ExAllocatePool2(POOL_FLAG_NON_PAGED, size, MINWAVERT_POOLTAG);
+        if (m_SystemStreams == NULL)
+        {
+            return STATUS_INSUFFICIENT_RESOURCES;
+        }
+        
+        // 
+        // For DRM support.
+        //
+        if (!NT_SUCCESS(Port_->QueryInterface(IID_IDrmPort2, (PVOID *)&m_pDrmPort)))
+        {
+            m_pDrmPort = NULL;
+        }
+    }
+    
+    // 
+    // For KS event support.
+    //
+    if (!NT_SUCCESS(Port_->QueryInterface(IID_IPortEvents, (PVOID *)&m_pPortEvents)))
+    {
+        m_pPortEvents = NULL;
+    }
+    
+    return ntStatus;
+} // Init
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP_(NTSTATUS)
+CMiniportWaveRT::NewStream
+( 
+    _Out_ PMINIPORTWAVERTSTREAM * OutStream,
+    _In_  PPORTWAVERTSTREAM       OuterUnknown,
+    _In_  ULONG                   Pin,
+    _In_  BOOLEAN                 Capture,
+    _In_  PKSDATAFORMAT           DataFormat
+)
+/*++
+
+Routine Description:
+
+  The NewStream function creates a new instance of a logical stream 
+  associated with a specified physical channel. Callers of NewStream should 
+  run at IRQL PASSIVE_LEVEL.
+
+Arguments:
+
+  OutStream -
+
+  OuterUnknown -
+
+  Pin - 
+
+  Capture - 
+
+  DataFormat -
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    ASSERT(OutStream);
+    ASSERT(DataFormat);
+
+    DPF_ENTER(("[CMiniportWaveRT::NewStream]"));
+
+    NTSTATUS                    ntStatus = STATUS_SUCCESS;
+    PCMiniportWaveRTStream      stream = NULL;
+    GUID                        signalProcessingMode = AUDIO_SIGNALPROCESSINGMODE_DEFAULT;
+    
+    *OutStream = NULL;
+
+     //
+    // If the data format attributes were specified, extract them.
+    //
+    if ( DataFormat->Flags & KSDATAFORMAT_ATTRIBUTES )
+    {
+        // The attributes are aligned (QWORD alignment) after the data format
+        PKSMULTIPLE_ITEM attributes = (PKSMULTIPLE_ITEM) (((PBYTE)DataFormat) + ((DataFormat->FormatSize + FILE_QUAD_ALIGNMENT) & ~FILE_QUAD_ALIGNMENT));
+        ntStatus = GetAttributesFromAttributeList(attributes, attributes->Size, &signalProcessingMode);
+    }
+
+    // Check if we have enough streams.
+    //
+    if (NT_SUCCESS(ntStatus))
+    {
+        ntStatus = ValidateStreamCreate(Pin, Capture);
+    }
+
+    // Determine if the format is valid.
+    //
+    if (NT_SUCCESS(ntStatus))
+    {
+        ntStatus = IsFormatSupported(Pin, Capture, DataFormat);
+    }
+
+    // Instantiate a stream. Stream must be in
+    // NonPagedPool(Nx) because of file saving.
+    //
+    if (NT_SUCCESS(ntStatus))
+    {
+        stream = new (POOL_FLAG_NON_PAGED, MINWAVERT_POOLTAG) 
+            CMiniportWaveRTStream(NULL);
+
+        if (stream)
+        {
+            stream->AddRef();
+
+            ntStatus = 
+                stream->Init
+                ( 
+                    this,
+                    OuterUnknown,
+                    Pin,
+                    Capture,
+                    DataFormat,
+                    signalProcessingMode
+                );
+        }
+        else
+        {
+            ntStatus = STATUS_INSUFFICIENT_RESOURCES;
+        }
+    }
+
+    if (NT_SUCCESS(ntStatus))
+    {
+        *OutStream = PMINIPORTWAVERTSTREAM(stream);
+        (*OutStream)->AddRef();
+
+        // The stream has references now for the caller.  The caller expects these
+        // references to be there.
+    }
+
+    // This is our private reference to the stream.  The caller has
+    // its own, so we can release in any case.
+    //
+    if (stream)
+    {
+        stream->Release();
+    }
+    
+    return ntStatus;
+} // NewStream
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP_(NTSTATUS)
+CMiniportWaveRT::NonDelegatingQueryInterface
+( 
+    _In_ REFIID  Interface,
+    _COM_Outptr_ PVOID * Object 
+)
+/*++
+
+Routine Description:
+
+  QueryInterface
+
+Arguments:
+
+  Interface - GUID
+
+  Object - interface pointer to be returned.
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    ASSERT(Object);
+
+    if (IsEqualGUIDAligned(Interface, IID_IUnknown))
+    {
+        *Object = PVOID(PUNKNOWN(PMINIPORTWAVERT(this)));
+    }
+    else if (IsEqualGUIDAligned(Interface, IID_IMiniport))
+    {
+        *Object = PVOID(PMINIPORT(this));
+    }
+    else if (IsEqualGUIDAligned(Interface, IID_IMiniportWaveRT))
+    {
+        *Object = PVOID(PMINIPORTWAVERT(this));
+    }
+    else if (IsEqualGUIDAligned(Interface, IID_IMiniportAudioSignalProcessing))
+    {
+        *Object = PVOID(PMINIPORTAudioSignalProcessing(this));
+    }
+    else
+    {
+        *Object = NULL;
+    }
+
+    if (*Object)
+    {
+        // We reference the interface for the caller.
+
+        PUNKNOWN(*Object)->AddRef();
+        return STATUS_SUCCESS;
+    }
+
+    return STATUS_INVALID_PARAMETER;
+} // NonDelegatingQueryInterface
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP_(NTSTATUS) CMiniportWaveRT::GetDeviceDescription(_Out_ PDEVICE_DESCRIPTION DmaDeviceDescription)
+{
+    PAGED_CODE ();
+
+    ASSERT (DmaDeviceDescription);
+
+    DPF_ENTER(("[CMiniportWaveRT::GetDeviceDescription]"));
+
+    RtlZeroMemory (DmaDeviceDescription, sizeof (DEVICE_DESCRIPTION));
+
+    //
+    // Init device description. This sample is using the same info for all m_DeviceType(s).
+    // 
+    
+    DmaDeviceDescription->Master = TRUE;
+    DmaDeviceDescription->ScatterGather = TRUE;
+    DmaDeviceDescription->Dma32BitAddresses = TRUE;
+    DmaDeviceDescription->InterfaceType = PCIBus;
+    DmaDeviceDescription->MaximumLength = 0xFFFFFFFF;
+
+    return STATUS_SUCCESS;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+CMiniportWaveRT::GetModes
+(
+    _In_                                        ULONG     Pin,
+    _Out_writes_opt_(*NumSignalProcessingModes) GUID*     SignalProcessingModes,
+    _Inout_                                     ULONG*    NumSignalProcessingModes
+)
+/*
+
+1.	If Pin is not a valid pin number, 
+        return STATUS_INVALID_PARAMETER.
+        
+2.	If Pin is a valid pin number and it supports n modes (n>0), 
+        init out-parameters and return STATUS_SUCCESS.
+    
+3.  Else this pin doesn't support any mode,
+        return STATUS_NOT_SUPPORTED. 
+        example: bridge pins or another mode-not-aware pins.
+
+*/
+{
+    PAGED_CODE();
+
+    DPF_ENTER(("[CMiniportWaveRT::GetModes]"));
+
+    NTSTATUS                ntStatus    = STATUS_INVALID_PARAMETER;
+    ULONG                   numModes    = 0;
+    MODE_AND_DEFAULT_FORMAT *modeInfo   = NULL;
+
+    if (Pin >= m_pMiniportPair->WaveDescriptor->PinCount)
+    {
+        return STATUS_INVALID_PARAMETER;
+    }
+
+    //
+    // This method is valid only on the following pins:
+    //  render is offload capable:
+    //      sink (#0) and offload (#1) pins.
+    //  render is NOT offload capable:
+    //      sink (#0) pin.
+    //  capture device: 
+    //      source (#1) pin.
+    //
+    numModes = GetPinSupportedDeviceModes(Pin, &modeInfo);
+    if (numModes == 0)
+    {
+        return STATUS_NOT_SUPPORTED;
+    }
+   
+    // If caller requests the modes, verify sufficient buffer size then return the modes
+    if (SignalProcessingModes != NULL)
+    {
+        if (*NumSignalProcessingModes < numModes)
+        {
+            *NumSignalProcessingModes = numModes;
+            ntStatus = STATUS_BUFFER_TOO_SMALL;
+            goto Done;
+        }
+
+        for (ULONG i=0; i<numModes; ++i)
+        {
+            SignalProcessingModes[i] = modeInfo[i].Mode;
+        }
+    }
+
+    ASSERT(numModes > 0);
+    *NumSignalProcessingModes = numModes;
+    ntStatus = STATUS_SUCCESS;
+
+Done:   
+    return ntStatus;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+CMiniportWaveRT::ValidateStreamCreate
+(
+    _In_    ULONG   _Pin,
+    _In_    BOOLEAN _Capture
+)
+{
+    PAGED_CODE();
+
+    DPF_ENTER(("[CMiniportWaveRT::ValidateStreamCreate]"));
+
+    NTSTATUS ntStatus = STATUS_NOT_SUPPORTED;
+
+    if (_Capture)
+    {
+
+        if (IsSystemCapturePin(_Pin))
+        {
+            VERIFY_PIN_INSTANCE_RESOURCES_AVAILABLE(ntStatus, m_ulSystemAllocated, m_ulMaxSystemStreams);
+        }
+
+    }
+    else
+    {
+
+        if (IsSystemRenderPin(_Pin))
+        {
+            VERIFY_PIN_INSTANCE_RESOURCES_AVAILABLE(ntStatus, m_ulSystemAllocated, m_ulMaxSystemStreams);
+        }
+    }
+
+    return ntStatus;
+}
+
+//=============================================================================
+#pragma code_seg()
+_Use_decl_annotations_
+VOID CMiniportWaveRT::AcquireFormatsAndModesLock()
+{
+    KeAcquireSpinLock(&m_DeviceFormatsAndModesLock, &m_DeviceFormatsAndModesIrql);
+}
+
+#pragma code_seg()
+_Use_decl_annotations_
+VOID CMiniportWaveRT::ReleaseFormatsAndModesLock()
+{
+    KeReleaseSpinLock(&m_DeviceFormatsAndModesLock, m_DeviceFormatsAndModesIrql);
+}
+
+//---------------------------------------------------------------------------
+// GetPinSupportedDeviceFormats 
+//
+//  Return supported formats for a given pin.
+//
+//  Return value
+//      The number of KSDATAFORMAT_WAVEFORMATEXTENSIBLE items.
+//
+//  Remarks
+//      Supported formats index array follows same order as filter's pin
+//      descriptor list.
+//
+#pragma code_seg()
+_Use_decl_annotations_
+ULONG CMiniportWaveRT::GetPinSupportedDeviceFormats(_In_ ULONG PinId, _Outptr_opt_result_buffer_(return) KSDATAFORMAT_WAVEFORMATEXTENSIBLE **ppFormats)
+{
+    PPIN_DEVICE_FORMATS_AND_MODES pDeviceFormatsAndModes = NULL;
+
+    AcquireFormatsAndModesLock();
+
+    pDeviceFormatsAndModes = m_DeviceFormatsAndModes;
+    ASSERT(m_DeviceFormatsAndModesCount > PinId);
+    ASSERT(pDeviceFormatsAndModes[PinId].WaveFormats != NULL);
+    ASSERT(pDeviceFormatsAndModes[PinId].WaveFormatsCount > 0);
+
+    if (ppFormats != NULL)
+    {
+        *ppFormats = pDeviceFormatsAndModes[PinId].WaveFormats;
+    }
+
+    ReleaseFormatsAndModesLock();
+
+    return pDeviceFormatsAndModes[PinId].WaveFormatsCount;
+}
+
+//---------------------------------------------------------------------------
+// GetPinSupportedDeviceModes 
+//
+//  Return mode information for a given pin.
+//
+//  Return value
+//      The number of MODE_AND_DEFAULT_FORMAT items or 0 if none.
+//
+//  Remarks
+//      Supported formats index array follows same order as filter's pin
+//      descriptor list.
+//
+#pragma code_seg()
+_Use_decl_annotations_
+ULONG CMiniportWaveRT::GetPinSupportedDeviceModes(_In_ ULONG PinId, _Outptr_opt_result_buffer_(return) _On_failure_(_Deref_post_null_) MODE_AND_DEFAULT_FORMAT **ppModes)
+{
+    PMODE_AND_DEFAULT_FORMAT modes;
+    ULONG numModes;
+
+    AcquireFormatsAndModesLock();
+
+    ASSERT(m_DeviceFormatsAndModesCount > PinId);
+    ASSERT((m_DeviceFormatsAndModes[PinId].ModeAndDefaultFormatCount == 0) == (m_DeviceFormatsAndModes[PinId].ModeAndDefaultFormat == NULL));
+
+    modes = m_DeviceFormatsAndModes[PinId].ModeAndDefaultFormat;
+    numModes = m_DeviceFormatsAndModes[PinId].ModeAndDefaultFormatCount;
+
+    if (ppModes != NULL)
+    {
+        if (numModes > 0)
+        {
+            *ppModes = modes;
+        }
+        else
+        {
+            // ensure that the returned pointer is NULL
+            // in the event of failure (SAL annotation above
+            // indicates that it must be NULL, and OACR sees a possibility
+            // that it might not be).
+            *ppModes = NULL;
+        }
+    }
+
+    ReleaseFormatsAndModesLock();
+    return numModes;
+}
+
+#pragma code_seg()
+BOOL CMiniportWaveRT::IsSystemCapturePin(ULONG nPinId)
+{
+    AcquireFormatsAndModesLock();
+
+    PINTYPE pinType = m_DeviceFormatsAndModes[nPinId].PinType;
+
+    ReleaseFormatsAndModesLock();
+    return (pinType == SystemCapturePin);
+}
+
+#pragma code_seg()
+BOOL CMiniportWaveRT::IsSystemRenderPin(ULONG nPinId)
+{
+    AcquireFormatsAndModesLock();
+
+    PINTYPE pinType = m_DeviceFormatsAndModes[nPinId].PinType;
+
+    ReleaseFormatsAndModesLock();
+    return (pinType == SystemRenderPin);
+}
+
+#pragma code_seg()
+BOOL CMiniportWaveRT::IsBridgePin(ULONG nPinId)
+{
+    AcquireFormatsAndModesLock();
+
+    PINTYPE pinType = m_DeviceFormatsAndModes[nPinId].PinType;
+
+    ReleaseFormatsAndModesLock();
+    return (pinType == BridgePin);
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+CMiniportWaveRT::StreamCreated
+(
+    _In_ ULONG                  _Pin,
+    _In_ PCMiniportWaveRTStream _Stream
+)
+{
+    PAGED_CODE();
+
+    PCMiniportWaveRTStream * streams        = NULL;
+    ULONG                    count          = 0;
+    
+    DPF_ENTER(("[CMiniportWaveRT::StreamCreated]"));
+
+    if (IsSystemCapturePin(_Pin))
+    {
+        ALLOCATE_PIN_INSTANCE_RESOURCES(m_ulSystemAllocated);
+        return STATUS_SUCCESS;
+    }
+    else if (IsSystemRenderPin(_Pin))
+    {
+
+        ALLOCATE_PIN_INSTANCE_RESOURCES(m_ulSystemAllocated);
+        streams = m_SystemStreams;
+        count = m_ulMaxSystemStreams;
+
+    }
+    
+    //
+    // Cache this stream's ptr.
+    //
+    if (streams != NULL)
+    {
+        ULONG i = 0;
+        for (; i<count; ++i)
+        {
+            if (streams[i] == NULL)
+            {
+                streams[i] = _Stream;
+                break;
+            }
+        }
+        ASSERT(i != count);
+    }
+
+    return STATUS_SUCCESS;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+CMiniportWaveRT::StreamClosed
+(
+    _In_ ULONG                  _Pin,
+    _In_ PCMiniportWaveRTStream _Stream
+)
+{
+    PAGED_CODE();
+
+    bool                      updateDrmRights = false;
+    PCMiniportWaveRTStream  * streams         = NULL;
+    ULONG                     count           = 0;
+
+    DPF_ENTER(("[CMiniportWaveRT::StreamClosed]"));
+
+    if (IsSystemCapturePin(_Pin))
+    {
+        FREE_PIN_INSTANCE_RESOURCES(m_ulSystemAllocated);
+        return STATUS_SUCCESS;
+    }
+    else if (IsSystemRenderPin(_Pin))
+    {
+
+        FREE_PIN_INSTANCE_RESOURCES(m_ulSystemAllocated);
+        streams = m_SystemStreams;
+        count = m_ulMaxSystemStreams;
+        updateDrmRights = true;
+
+    }
+
+    //
+    // Cleanup.
+    //
+    if (streams != NULL)
+    {
+        ULONG i = 0;
+        for (; i<count; ++i)
+        {
+            if (streams[i] == _Stream)
+            {
+                streams[i] = NULL;
+                break;
+            }
+        }
+        ASSERT(i != count);
+    }
+    
+    //
+    // Update mixed drm rights.
+    //
+    if (updateDrmRights)
+    {
+        UpdateDrmRights();
+    }
+
+    return STATUS_SUCCESS;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+CMiniportWaveRT::GetAttributesFromAttributeList
+(
+    _In_ const KSMULTIPLE_ITEM *_pAttributes,
+    _In_ size_t _Size,
+    _Out_ GUID* _pSignalProcessingMode
+)
+/*++
+
+Routine Description:
+
+  Processes attributes list and return known attributes.
+
+Arguments:
+
+  _pAttributes - pointer to KSMULTIPLE_ITEM at head of an attributes list.
+
+  _Size - count of bytes in the buffer pointed to by _pAttributes. The routine
+    verifies sufficient buffer size while processing the attributes.
+
+  _pSignalProcessingMode - returns the signal processing mode extracted from
+    the attribute list, or AUDIO_SIGNALPROCESSINGMODE_DEFAULT if the attribute
+    is not present in the list.
+
+Return Value:
+
+  NT status code.
+
+Remarks
+
+    This function is currently written for a single supported attribute
+    (KSATTRIBUTEID_AUDIOSIGNALPROCESSING_MODE). As additional attributes are defined in the future,
+    this function should be rewritten to be data driven through tables, etc.
+
+--*/
+{
+    PAGED_CODE();
+    
+    DPF_ENTER(("[CMiniportWaveRT::GetAttributesFromAttributeList]"));
+
+    size_t cbRemaining = _Size;
+
+    *_pSignalProcessingMode = AUDIO_SIGNALPROCESSINGMODE_DEFAULT;
+
+    if (cbRemaining < sizeof(KSMULTIPLE_ITEM))
+    {
+        return STATUS_INVALID_PARAMETER;
+    }
+    cbRemaining -= sizeof(KSMULTIPLE_ITEM);
+
+    //
+    // Extract attributes.
+    //
+    PKSATTRIBUTE attributeHeader = (PKSATTRIBUTE)(_pAttributes + 1);
+
+    for (ULONG i = 0; i < _pAttributes->Count; i++)
+    {
+        if (cbRemaining < sizeof(KSATTRIBUTE))
+        {
+            return STATUS_INVALID_PARAMETER;
+        }
+
+        if (attributeHeader->Attribute == KSATTRIBUTEID_AUDIOSIGNALPROCESSING_MODE)
+        {
+            KSATTRIBUTE_AUDIOSIGNALPROCESSING_MODE* signalProcessingModeAttribute;
+
+            if (cbRemaining < sizeof(KSATTRIBUTE_AUDIOSIGNALPROCESSING_MODE))
+            {
+                return STATUS_INVALID_PARAMETER;
+            }
+
+            if (attributeHeader->Size != sizeof(KSATTRIBUTE_AUDIOSIGNALPROCESSING_MODE))
+            {
+                return STATUS_INVALID_PARAMETER;
+            }
+
+            signalProcessingModeAttribute = (KSATTRIBUTE_AUDIOSIGNALPROCESSING_MODE*)attributeHeader;
+
+            // Return mode to caller.
+            *_pSignalProcessingMode = signalProcessingModeAttribute->SignalProcessingMode;
+        }
+        else
+        {
+            return STATUS_NOT_SUPPORTED;
+        }
+
+        // Adjust pointer and buffer size to next attribute (QWORD aligned)
+        ULONG cbAttribute = ((attributeHeader->Size + FILE_QUAD_ALIGNMENT) & ~FILE_QUAD_ALIGNMENT);
+
+        attributeHeader = (PKSATTRIBUTE) (((PBYTE)attributeHeader) + cbAttribute);
+        cbRemaining -= cbAttribute;
+    }
+
+    return STATUS_SUCCESS;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+CMiniportWaveRT::IsFormatSupported
+(
+    _In_ ULONG          _ulPin,
+    _In_ BOOLEAN        _bCapture,
+    _In_ PKSDATAFORMAT  _pDataFormat
+)
+{
+    PAGED_CODE();
+
+    DPF_ENTER(("[CMiniportWaveRT::IsFormatSupported]"));
+
+    NTSTATUS                            ntStatus = STATUS_NO_MATCH;
+    PKSDATAFORMAT_WAVEFORMATEXTENSIBLE  pPinFormats = NULL;
+    ULONG                               cPinFormats = 0;
+
+    UNREFERENCED_PARAMETER(_bCapture);
+
+    if (_ulPin >= m_pMiniportPair->WaveDescriptor->PinCount)
+    {
+        return STATUS_INVALID_PARAMETER;
+    }
+
+    cPinFormats = GetPinSupportedDeviceFormats(_ulPin, &pPinFormats);
+
+    for (UINT iFormat = 0; iFormat < cPinFormats; iFormat++)
+    {
+        PKSDATAFORMAT_WAVEFORMATEXTENSIBLE pFormat = &pPinFormats[iFormat];
+        // KSDATAFORMAT VALIDATION
+        if (!IsEqualGUIDAligned(pFormat->DataFormat.MajorFormat, _pDataFormat->MajorFormat)) { continue; }
+        if (!IsEqualGUIDAligned(pFormat->DataFormat.SubFormat, _pDataFormat->SubFormat)) { continue; }
+        if (!IsEqualGUIDAligned(pFormat->DataFormat.Specifier, _pDataFormat->Specifier)) { continue; }
+        if (pFormat->DataFormat.FormatSize < sizeof(KSDATAFORMAT_WAVEFORMATEX)) { continue; }
+
+        // WAVEFORMATEX VALIDATION
+        PWAVEFORMATEX pWaveFormat = reinterpret_cast<PWAVEFORMATEX>(_pDataFormat + 1);
+        
+        if (pWaveFormat->wFormatTag != WAVE_FORMAT_EXTENSIBLE)
+        {
+            if (pWaveFormat->wFormatTag != EXTRACT_WAVEFORMATEX_ID(&(pFormat->WaveFormatExt.SubFormat))) { continue; }
+        }
+        if (pWaveFormat->nChannels  != pFormat->WaveFormatExt.Format.nChannels) { continue; }
+        if (pWaveFormat->nSamplesPerSec != pFormat->WaveFormatExt.Format.nSamplesPerSec) { continue; }
+        if (pWaveFormat->nBlockAlign != pFormat->WaveFormatExt.Format.nBlockAlign) { continue; }
+        if (pWaveFormat->wBitsPerSample != pFormat->WaveFormatExt.Format.wBitsPerSample) { continue; }
+        if (pWaveFormat->wFormatTag != WAVE_FORMAT_EXTENSIBLE)
+        {
+            ntStatus = STATUS_SUCCESS;
+            break;
+        }
+
+        // WAVEFORMATEXTENSIBLE VALIDATION
+        if (pWaveFormat->cbSize < sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX)) { continue; }
+
+        PWAVEFORMATEXTENSIBLE pWaveFormatExt = reinterpret_cast<PWAVEFORMATEXTENSIBLE>(pWaveFormat);
+        if (pWaveFormatExt->Samples.wValidBitsPerSample != pFormat->WaveFormatExt.Samples.wValidBitsPerSample) { continue; }
+        if (pWaveFormatExt->dwChannelMask != pFormat->WaveFormatExt.dwChannelMask) { continue; }
+        if (!IsEqualGUIDAligned(pWaveFormatExt->SubFormat, pFormat->WaveFormatExt.SubFormat)) { continue; }
+
+        ntStatus = STATUS_SUCCESS;
+        break;
+    }
+
+    return ntStatus;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+CMiniportWaveRT::PropertyHandlerProposedFormat
+(
+    _In_ PPCPROPERTY_REQUEST      PropertyRequest
+)
+{
+    PKSP_PIN                kspPin                  = NULL;
+    PKSDATAFORMAT           pKsFormat               = NULL;
+    ULONG                   cbMinSize               = 0;
+    NTSTATUS                ntStatus                = STATUS_INVALID_PARAMETER;
+
+    PAGED_CODE();
+
+    DPF_ENTER(("[CMiniportWaveRT::PropertyHandlerProposedFormat]"));
+    
+    // All properties handled by this handler require at least a KSP_PIN descriptor.
+
+    // Verify instance data stores at least KSP_PIN fields beyond KSPPROPERTY.
+    if (PropertyRequest->InstanceSize < (sizeof(KSP_PIN) - RTL_SIZEOF_THROUGH_FIELD(KSP_PIN, Property)))
+    {
+        return STATUS_INVALID_PARAMETER;
+    }
+
+    // Extract property descriptor from property request instance data
+    kspPin = CONTAINING_RECORD(PropertyRequest->Instance, KSP_PIN, PinId);
+
+    //
+    // This method is valid only on streaming pins.
+    //
+    if (IsSystemRenderPin(kspPin->PinId) ||
+        IsSystemCapturePin(kspPin->PinId))
+    {
+        ntStatus = STATUS_SUCCESS;
+    }
+    else if (IsBridgePin(kspPin->PinId))
+    {
+        ntStatus = STATUS_NOT_SUPPORTED;
+    }
+    else 
+    {
+        ntStatus = STATUS_INVALID_PARAMETER;
+    }
+
+    if (!NT_SUCCESS(ntStatus))
+    {
+        return ntStatus;
+    }
+
+    cbMinSize = sizeof(KSDATAFORMAT_WAVEFORMATEXTENSIBLE);
+   
+    // Handle KSPROPERTY_TYPE_BASICSUPPORT query
+    if (PropertyRequest->Verb & KSPROPERTY_TYPE_BASICSUPPORT)
+    {
+        ULONG flags = PropertyRequest->PropertyItem->Flags;
+        
+        return PropertyHandler_BasicSupport(PropertyRequest, flags, VT_ILLEGAL);
+    }
+
+    // Verify value size
+    if (PropertyRequest->ValueSize == 0)
+    {
+        PropertyRequest->ValueSize = cbMinSize;
+        return STATUS_BUFFER_OVERFLOW;
+    }
+    if (PropertyRequest->ValueSize < cbMinSize)
+    {
+        return STATUS_BUFFER_TOO_SMALL;
+    }
+
+    if (PropertyRequest->Verb & KSPROPERTY_TYPE_GET)
+    {
+        ntStatus = STATUS_INVALID_DEVICE_REQUEST;
+    }
+    else if (PropertyRequest->Verb & KSPROPERTY_TYPE_SET)
+    {
+        pKsFormat = (PKSDATAFORMAT)PropertyRequest->Value;
+        ntStatus = IsFormatSupported(kspPin->PinId, IsSystemCapturePin(kspPin->PinId) || FALSE, pKsFormat);
+        if (!NT_SUCCESS(ntStatus))
+        {
+            return ntStatus;
+        }
+    }
+
+    return ntStatus;
+} // PropertyHandlerProposedFormat
+
+//=============================================================================
+#pragma code_seg()
+NTSTATUS
+CMiniportWaveRT_EventHandler_PinCapsChange
+(
+_In_  PPCEVENT_REQUEST EventRequest
+)
+{
+    CMiniportWaveRT* miniport = reinterpret_cast<CMiniportWaveRT*>(EventRequest->MajorTarget);
+    return miniport->EventHandler_PinCapsChange(EventRequest);
+}
+
+//=============================================================================
+#pragma code_seg()
+NTSTATUS
+CMiniportWaveRT::EventHandler_PinCapsChange
+(
+_In_  PPCEVENT_REQUEST EventRequest
+)
+{
+    if (*EventRequest->EventItem->Set != KSEVENTSETID_PinCapsChange)
+    {
+        return STATUS_INVALID_PARAMETER;
+    }
+
+    switch (EventRequest->Verb)
+    {
+        // Do we support event handling?!?
+    case PCEVENT_VERB_SUPPORT:
+        break;
+        // We should add the event now!
+    case PCEVENT_VERB_ADD:
+        // If we have the interface and EventEntry is defined ...
+        if (EventRequest->EventEntry)
+        {
+            switch (EventRequest->EventItem->Id)
+            {
+                // Add pincaps format change event to support the force sample rate feature
+                case KSEVENT_PINCAPS_FORMATCHANGE:
+                    m_pPortEvents->AddEventToEventList(EventRequest->EventEntry);
+                    break;
+                default:
+                    return STATUS_INVALID_PARAMETER;
+                    break;
+            }
+        }
+        else
+        {
+            return STATUS_UNSUCCESSFUL;
+        }
+        break;
+
+    case PCEVENT_VERB_REMOVE:
+        // We cannot remove the event but we can stop generating the
+        // events. However, it also doesn't hurt to always generate them ...
+        break;
+
+    default:
+        return STATUS_INVALID_PARAMETER;
+    }
+
+    return STATUS_SUCCESS;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+CMiniportWaveRT::PropertyHandlerProposedFormat2
+(
+    _In_ PPCPROPERTY_REQUEST      PropertyRequest
+)
+{
+    PKSP_PIN                kspPin                  = NULL;
+    ULONG                   cbMinSize               = 0;
+    NTSTATUS                ntStatus                = STATUS_INVALID_PARAMETER;
+    ULONG                   numModes                = 0;
+    MODE_AND_DEFAULT_FORMAT *modeInfo               = NULL;
+    MODE_AND_DEFAULT_FORMAT *modeTemp               = NULL;
+    PKSMULTIPLE_ITEM        pKsItemsHeader          = NULL;
+    PKSMULTIPLE_ITEM        pKsItemsHeaderOut       = NULL;
+    size_t                  cbItemsList             = 0;
+    GUID                    signalProcessingMode    = {0};
+    BOOLEAN                 bFound                  = FALSE;
+    ULONG                   i;
+
+    PAGED_CODE();
+
+    DPF_ENTER(("[CMiniportWaveRT::PropertyHandlerProposedFormat2]"));
+    
+    // All properties handled by this handler require at least a KSP_PIN descriptor.
+
+    // Verify instance data stores at least KSP_PIN fields beyond KSPPROPERTY.
+    if (PropertyRequest->InstanceSize < (sizeof(KSP_PIN) - RTL_SIZEOF_THROUGH_FIELD(KSP_PIN, Property)))
+    {
+        return STATUS_INVALID_PARAMETER;
+    }
+
+    // Extract property descriptor from property request instance data
+    kspPin = CONTAINING_RECORD(PropertyRequest->Instance, KSP_PIN, PinId);
+
+    if (kspPin->PinId >= m_pMiniportPair->WaveDescriptor->PinCount)
+    {
+        return STATUS_INVALID_PARAMETER;
+    }
+
+    //
+    // This property is supported only on some streaming pins.
+    //
+    numModes = GetPinSupportedDeviceModes(kspPin->PinId, &modeInfo);
+
+    ASSERT((modeInfo != NULL && numModes > 0) || (modeInfo == NULL && numModes == 0));
+
+    if (modeInfo == NULL)
+    {
+        return STATUS_NOT_SUPPORTED;
+    }
+
+    //
+    // Even for pins that support modes, the pin might not support proposed formats
+    //
+    bFound = FALSE;
+    for (i=0, modeTemp=modeInfo; i<numModes; ++i, ++modeTemp)
+    {
+        if (modeTemp->DefaultFormat != NULL)
+        {
+            bFound = TRUE;
+            break;
+        }
+    }
+
+    if (!bFound)
+    {
+        return STATUS_NOT_SUPPORTED;
+    }
+
+    //
+    // The property is generally supported on this pin. Handle basic support request.
+    //
+    if (PropertyRequest->Verb & KSPROPERTY_TYPE_BASICSUPPORT)
+    {
+        return PropertyHandler_BasicSupport(PropertyRequest, PropertyRequest->PropertyItem->Flags, VT_ILLEGAL);
+    }
+
+    //
+    // Get the mode if specified.
+    //
+    pKsItemsHeader = (PKSMULTIPLE_ITEM)(kspPin + 1);
+    cbItemsList = (((PBYTE)PropertyRequest->Instance) + PropertyRequest->InstanceSize) - (PBYTE)pKsItemsHeader;
+
+    ntStatus = GetAttributesFromAttributeList(pKsItemsHeader, cbItemsList, &signalProcessingMode);
+    if (!NT_SUCCESS(ntStatus))
+    {
+        return ntStatus;
+    }
+
+    //
+    // Get the info associated with this mode.
+    //
+    bFound = FALSE;
+    for (i=0; i<numModes; ++i, ++modeInfo)
+    {
+        if (modeInfo->Mode == signalProcessingMode)
+        {
+            bFound = TRUE;
+            break;
+        }
+    }
+
+    // Either the mode isn't supported, or the driver doesn't support a
+    // proprosed format for this specific mode.
+    if (!bFound || modeInfo->DefaultFormat == NULL)
+    {
+        return STATUS_NOT_SUPPORTED;
+    }
+
+    //
+    // Compute output data buffer.
+    //
+    cbMinSize = modeInfo->DefaultFormat->FormatSize;
+    cbMinSize = (cbMinSize + 7) & ~7;
+
+    pKsItemsHeaderOut = (PKSMULTIPLE_ITEM)((PBYTE)PropertyRequest->Value + cbMinSize);
+
+    if (cbItemsList > MAXULONG)
+    {
+        return STATUS_INVALID_PARAMETER;
+    }
+
+    // Total # of bytes.
+    ntStatus = RtlULongAdd(cbMinSize, (ULONG)cbItemsList, &cbMinSize);
+    if (!NT_SUCCESS(ntStatus))
+    {
+        return STATUS_INVALID_PARAMETER;
+    }
+        
+    // Property not supported.
+    if (cbMinSize == 0)
+    {
+        return STATUS_NOT_SUPPORTED;
+    }
+
+    // Verify value size
+    if (PropertyRequest->ValueSize == 0)
+    {
+        PropertyRequest->ValueSize = cbMinSize;
+        return STATUS_BUFFER_OVERFLOW;
+    }
+    if (PropertyRequest->ValueSize < cbMinSize)
+    {
+        return STATUS_BUFFER_TOO_SMALL;
+    }
+
+    // Only GET is supported for this property
+    if ((PropertyRequest->Verb & KSPROPERTY_TYPE_GET) == 0)
+    {
+        return STATUS_INVALID_DEVICE_REQUEST;
+    }
+
+    // Copy the proposed default format.
+    RtlCopyMemory(PropertyRequest->Value, modeInfo->DefaultFormat, modeInfo->DefaultFormat->FormatSize);
+
+    // Copy back the attribute list.
+    ASSERT(cbItemsList > 0);
+    ((KSDATAFORMAT*)PropertyRequest->Value)->Flags = KSDATAFORMAT_ATTRIBUTES;
+    RtlCopyMemory(pKsItemsHeaderOut, pKsItemsHeader, cbItemsList);
+    
+    PropertyRequest->ValueSize = cbMinSize;
+
+    return STATUS_SUCCESS;
+} // PropertyHandlerProposedFormat
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+CMiniportWaveRT::UpdateDrmRights
+(
+    void
+)
+/*++
+
+Routine Description:
+
+  Updates the mixed DrmRights. This is done by creating an array of existing
+  content ids and asking DrmPort to create a new contend id with a mixed
+  DrmRights structure.
+  The new DrmRights structure should be enforced, if everything goes well.
+
+Arguments:
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    DPF_ENTER(("[CMiniportWaveRT::UpdateDrmRights]"));
+    
+    NTSTATUS        ntStatus                = STATUS_UNSUCCESSFUL;
+    ULONG           ulMixDrmContentId       = 0;
+    BOOL            fCreatedContentId       = FALSE;
+    DRMRIGHTS       MixDrmRights            = {FALSE, 0, FALSE};
+    ULONG           ulContentIndex          = 0;
+    ULONG*          ulContentIds            = NULL;
+
+    //
+    // This function only runs if IID_DrmPort is implemented in Wave port.
+    //
+    if (!m_pDrmPort)
+    {
+        return STATUS_UNSUCCESSFUL;
+    }
+
+    ulContentIds = new (POOL_FLAG_NON_PAGED, MINWAVERT_POOLTAG) ULONG[m_ulMaxSystemStreams + m_ulMaxOffloadStreams];
+    if (!ulContentIds)
+    {
+        return STATUS_INSUFFICIENT_RESOURCES;
+    }
+
+    //
+    // Create an array of all StreamIds.
+    //
+    for (ULONG i = 0; i < m_ulMaxSystemStreams; i++)
+    {
+        if (m_SystemStreams[i])
+        {
+            ulContentIds[ulContentIndex] = m_SystemStreams[i]->m_ulContentId;
+            ulContentIndex++;
+        }
+    }
+
+    //
+    // Create the new contentId.
+    //
+    if (ulContentIndex)
+    {
+        ntStatus = 
+            m_pDrmPort->CreateContentMixed
+            (
+                ulContentIds,
+                ulContentIndex,
+                &ulMixDrmContentId
+            );
+        
+        if (NT_SUCCESS(ntStatus))
+        {
+            fCreatedContentId = TRUE;
+            ntStatus = 
+                m_pDrmPort->GetContentRights
+                (
+                    ulMixDrmContentId, 
+                    &MixDrmRights
+                );
+        }
+    }
+
+    //
+    // If successful, destroy the old ContentId and update global rights.
+    //
+    if (NT_SUCCESS(ntStatus))
+    {
+        m_pDrmPort->DestroyContent(m_ulMixDrmContentId);
+        m_ulMixDrmContentId = ulMixDrmContentId;
+        RtlCopyMemory(&m_MixDrmRights, &MixDrmRights, sizeof(m_MixDrmRights));
+
+        //
+        // At this point the driver should enforce the new DrmRights.
+        // The sample driver handles DrmRights per stream basis, and 
+        // stops writing the stream to disk, if CopyProtect = TRUE.
+        //
+    } 
+
+    //
+    // Cleanup if failed
+    // 
+    if (!NT_SUCCESS(ntStatus) && fCreatedContentId)
+    {
+        m_pDrmPort->DestroyContent(ulMixDrmContentId);
+    }
+
+    //
+    // Free allocated memory.
+    //
+    ASSERT(ulContentIds);
+    delete [] ulContentIds;
+    ulContentIds = NULL;
+
+    return ntStatus;
+} // UpdateDrmRights
+
+#pragma code_seg("PAGE")
+NTSTATUS
+PropertyHandler_WaveFilter
+( 
+    _In_ PPCPROPERTY_REQUEST      PropertyRequest 
+)
+/*++
+
+Routine Description:
+
+  Redirects general property request to miniport object
+
+Arguments:
+
+  PropertyRequest - 
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    NTSTATUS            ntStatus = STATUS_INVALID_DEVICE_REQUEST;
+    CMiniportWaveRT*    pWaveHelper = reinterpret_cast<CMiniportWaveRT*>(PropertyRequest->MajorTarget);
+
+    if (pWaveHelper == NULL)
+    {
+        return STATUS_INVALID_PARAMETER;
+    }
+
+    pWaveHelper->AddRef();
+
+
+    if (IsEqualGUIDAligned(*PropertyRequest->PropertyItem->Set, KSPROPSETID_Pin))
+    {
+        switch (PropertyRequest->PropertyItem->Id)
+        {
+            case KSPROPERTY_PIN_PROPOSEDATAFORMAT:
+                ntStatus = pWaveHelper->PropertyHandlerProposedFormat(PropertyRequest);
+                break;
+            
+            case KSPROPERTY_PIN_PROPOSEDATAFORMAT2:
+                ntStatus = pWaveHelper->PropertyHandlerProposedFormat2(PropertyRequest);
+                break;
+
+            default:
+                DPF(D_TERSE, ("[PropertyHandler_WaveFilter: Invalid Device Request]"));
+        }
+    }
+
+    pWaveHelper->Release();
+
+    return ntStatus;
+} // PropertyHandler_WaveFilter
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+PropertyHandler_GenericPin
+( 
+    _In_ PPCPROPERTY_REQUEST      PropertyRequest 
+)
+{
+    NTSTATUS                ntStatus = STATUS_INVALID_DEVICE_REQUEST;
+    CMiniportWaveRT*        pWave = NULL;
+    CMiniportWaveRTStream * pStream = NULL;
+
+    PAGED_CODE();
+
+    if (PropertyRequest->MajorTarget == NULL ||
+        PropertyRequest->MinorTarget == NULL)
+    {
+        ntStatus = STATUS_INVALID_PARAMETER;
+        goto exit;
+    }
+    
+    //
+    // Get a ref to the miniport.
+    //
+    pWave = MajorTarget_to_Obj(PropertyRequest->MajorTarget);
+    pWave->AddRef();
+
+    //
+    // Get a ref to the stream.
+    //
+    pStream = MinorTarget_to_Obj(PropertyRequest->MinorTarget);
+    pStream->AddRef();
+
+exit:
+
+    SAFE_RELEASE(pStream);
+    SAFE_RELEASE(pWave);
+    
+    return ntStatus;
+}
+
+#pragma code_seg()
+
diff --git a/audio/simpleaudiosample/Source/Main/minwavert.h b/audio/simpleaudiosample/Source/Main/minwavert.h
new file mode 100644
index 00000000..4c0ccd83
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Main/minwavert.h
@@ -0,0 +1,302 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    minwavert.h
+
+Abstract:
+
+    Definition of wavert miniport class.
+--*/
+
+#ifndef _SIMPLEAUDIOSAMPLE_MINWAVERT_H_
+#define _SIMPLEAUDIOSAMPLE_MINWAVERT_H_
+
+//=============================================================================
+// Referenced Forward
+//=============================================================================
+class CMiniportWaveRTStream;
+typedef CMiniportWaveRTStream *PCMiniportWaveRTStream;
+
+//=============================================================================
+// Classes
+//=============================================================================
+///////////////////////////////////////////////////////////////////////////////
+// CMiniportWaveRT
+//   
+class CMiniportWaveRT : 
+    public IMiniportWaveRT,
+    public IMiniportAudioSignalProcessing,
+    public CUnknown
+{
+private:
+    ULONG                               m_ulSystemAllocated;
+
+    ULONG                               m_ulMaxSystemStreams;
+    ULONG                               m_ulMaxOffloadStreams;
+    ULONG                               m_ulMaxLoopbackStreams;
+
+    // weak ref of running streams.
+    PCMiniportWaveRTStream            * m_SystemStreams;
+
+    BOOL                                m_bGfxEnabled;
+    PBOOL                               m_pbMuted;
+    PLONG                               m_plVolumeLevel;
+    PKSDATAFORMAT_WAVEFORMATEXTENSIBLE  m_pMixFormat;
+    PKSDATAFORMAT_WAVEFORMATEXTENSIBLE  m_pDeviceFormat;
+    PCFILTER_DESCRIPTOR                 m_FilterDesc;
+    PIN_DEVICE_FORMATS_AND_MODES *      m_DeviceFormatsAndModes;
+    KSPIN_LOCK                          m_DeviceFormatsAndModesLock; // To serialize access.
+    KIRQL                               m_DeviceFormatsAndModesIrql;
+    ULONG                               m_DeviceFormatsAndModesCount; 
+    USHORT                              m_DeviceMaxChannels;
+    PDRMPORT                            m_pDrmPort;
+    DRMRIGHTS                           m_MixDrmRights;
+    ULONG                               m_ulMixDrmContentId;
+
+    union {
+        PVOID                           m_DeviceContext;
+    };
+
+protected:
+    PADAPTERCOMMON                      m_pAdapterCommon;
+    ULONG                               m_DeviceFlags;
+    eDeviceType                         m_DeviceType;
+    PPORTEVENTS                         m_pPortEvents;
+    PENDPOINT_MINIPAIR                  m_pMiniportPair;
+    
+public:
+    NTSTATUS EventHandler_PinCapsChange
+    (
+        _In_  PPCEVENT_REQUEST EventRequest
+    );
+
+    NTSTATUS ValidateStreamCreate
+    (
+        _In_    ULONG   _Pin,
+        _In_    BOOLEAN _Capture
+    );
+    
+    NTSTATUS StreamCreated
+    (
+        _In_ ULONG                  _Pin,
+        _In_ PCMiniportWaveRTStream _Stream
+    );
+    
+    NTSTATUS StreamClosed
+    (
+        _In_ ULONG                  _Pin,
+        _In_ PCMiniportWaveRTStream _Stream
+    );
+    
+    NTSTATUS IsFormatSupported
+    ( 
+        _In_ ULONG          _ulPin,
+        _In_ BOOLEAN        _bCapture,
+        _In_ PKSDATAFORMAT  _pDataFormat
+    );
+
+    static NTSTATUS GetAttributesFromAttributeList
+    (
+        _In_ const KSMULTIPLE_ITEM *_pAttributes,
+        _In_ size_t _Size,
+        _Out_ GUID* _pSignalProcessingMode
+    );
+
+protected:
+    NTSTATUS UpdateDrmRights
+    (
+        void
+    );
+
+public:
+    DECLARE_STD_UNKNOWN();
+
+#pragma code_seg("PAGE")
+    CMiniportWaveRT(
+        _In_            PUNKNOWN                                UnknownAdapter,
+        _In_            PENDPOINT_MINIPAIR                      MiniportPair,
+        _In_opt_        PVOID                                   DeviceContext
+    )
+        :CUnknown(0),
+        m_ulMaxSystemStreams(0),
+        m_DeviceType(MiniportPair->DeviceType),
+        m_DeviceContext(DeviceContext),
+        m_DeviceMaxChannels(MiniportPair->DeviceMaxChannels),
+        m_DeviceFormatsAndModes(MiniportPair->PinDeviceFormatsAndModes),
+        m_DeviceFormatsAndModesCount(MiniportPair->PinDeviceFormatsAndModesCount),
+        m_DeviceFlags(MiniportPair->DeviceFlags),
+        m_pMiniportPair(MiniportPair)
+    {
+        PAGED_CODE();
+
+        m_pAdapterCommon = (PADAPTERCOMMON)UnknownAdapter; // weak ref.
+
+        if (MiniportPair->WaveDescriptor)
+        {
+            RtlCopyMemory(&m_FilterDesc, MiniportPair->WaveDescriptor, sizeof(m_FilterDesc));
+            
+            //
+            // Get the max # of pin instances.
+            //
+            if (IsRenderDevice())
+            {
+                if (m_FilterDesc.PinCount > KSPIN_WAVE_RENDER2_SOURCE)
+                {
+                    m_ulMaxSystemStreams = m_FilterDesc.Pins[KSPIN_WAVE_RENDER2_SINK_SYSTEM].MaxFilterInstanceCount;
+                    m_ulMaxLoopbackStreams = m_FilterDesc.Pins[KSPIN_WAVE_RENDER2_SINK_LOOPBACK].MaxFilterInstanceCount;
+                }
+                else if(m_FilterDesc.PinCount > KSPIN_WAVE_RENDER3_SOURCE)
+                {
+                    m_ulMaxSystemStreams = m_FilterDesc.Pins[KSPIN_WAVE_RENDER3_SINK_SYSTEM].MaxFilterInstanceCount;
+                }
+            }
+            else
+            {
+                //
+                // capture bridge pin comes first in the enumeration
+                //
+                if (m_FilterDesc.PinCount > KSPIN_WAVEIN_HOST)
+                {
+                    m_ulMaxSystemStreams = m_FilterDesc.Pins[KSPIN_WAVEIN_HOST].MaxFilterInstanceCount;
+                }
+            }
+        }
+
+        KeInitializeSpinLock(&m_DeviceFormatsAndModesLock);
+        m_DeviceFormatsAndModesIrql = PASSIVE_LEVEL;
+    }
+
+#pragma code_seg()
+
+    ~CMiniportWaveRT();
+
+    IMP_IMiniportWaveRT;
+    IMP_IMiniportAudioSignalProcessing;
+    
+    // Friends
+    friend class        CMiniportWaveRTStream;
+    friend class        CMiniportTopologySimpleAudioSample;
+    
+    friend NTSTATUS PropertyHandler_WaveFilter
+    (   
+        _In_ PPCPROPERTY_REQUEST      PropertyRequest 
+    );   
+
+public:
+public:
+    NTSTATUS PropertyHandlerProposedFormat
+    (
+        _In_ PPCPROPERTY_REQUEST PropertyRequest
+    );
+
+    NTSTATUS PropertyHandlerProposedFormat2
+
+    (
+        _In_ PPCPROPERTY_REQUEST PropertyRequest
+    );
+
+    PADAPTERCOMMON GetAdapterCommObj() 
+    {
+        return m_pAdapterCommon; 
+    };
+#pragma code_seg()
+
+    //---------------------------------------------------------------------------------------------------------
+    // volume
+    //---------------------------------------------------------------------------------------------------------
+    NTSTATUS GetVolumeChannelCount
+    (
+        _Out_  UINT32* pulChannelCount
+    );
+
+    NTSTATUS GetVolumeSteppings
+    (
+        _Out_writes_bytes_(_ui32DataSize)  PKSPROPERTY_STEPPING_LONG _pKsPropStepLong,
+        _In_  UINT32    _ui32DataSize
+    );
+
+    NTSTATUS GetChannelVolume
+    (
+        _In_  UINT32    _uiChannel,
+        _Out_  LONG* _pVolume
+    );
+
+    NTSTATUS SetChannelVolume
+    (
+        _In_  UINT32    _uiChannel,
+        _In_  LONG      _Volume
+    );
+
+    //-----------------------------------------------------------------------------
+    // mute
+    //-----------------------------------------------------------------------------
+    NTSTATUS GetMuteChannelCount
+    (
+        _Out_  UINT32* pulChannelCount
+    );
+
+    NTSTATUS GetMuteSteppings
+    (
+        _Out_writes_bytes_(_ui32DataSize)  PKSPROPERTY_STEPPING_LONG _pKsPropStepLong,
+        _In_  UINT32    _ui32DataSize
+    );
+
+    NTSTATUS GetChannelMute
+    (
+        _In_  UINT32    _uiChannel,
+        _Out_  BOOL* _pbMute
+    );
+
+    NTSTATUS SetChannelMute
+    (
+        _In_  UINT32    _uiChannel,
+        _In_  BOOL      _bMute
+    );
+
+private:
+    _IRQL_raises_(DISPATCH_LEVEL)
+    _Acquires_lock_(m_DeviceFormatsAndModesLock)
+    _Requires_lock_not_held_(m_DeviceFormatsAndModesLock)
+    _IRQL_saves_global_(SpinLock, m_DeviceFormatsAndModesIrql)
+    VOID AcquireFormatsAndModesLock();
+
+    _Releases_lock_(m_DeviceFormatsAndModesLock)
+    _Requires_lock_held_(m_DeviceFormatsAndModesLock)
+    _IRQL_restores_global_(SpinLock, m_DeviceFormatsAndModesIrql)
+    VOID ReleaseFormatsAndModesLock();
+
+    _Post_satisfies_(return > 0)
+    ULONG GetPinSupportedDeviceFormats(_In_ ULONG PinId, _Outptr_opt_result_buffer_(return) KSDATAFORMAT_WAVEFORMATEXTENSIBLE **ppFormats);
+
+    _Success_(return != 0)
+    ULONG GetPinSupportedDeviceModes(_In_ ULONG PinId, _Outptr_opt_result_buffer_(return) _On_failure_(_Deref_post_null_) MODE_AND_DEFAULT_FORMAT **ppModes);
+
+#pragma code_seg()
+
+protected:
+#pragma code_seg()
+    BOOL IsRenderDevice()
+    {
+        return m_DeviceType == eSpeakerDevice ? TRUE : FALSE;
+    }
+
+    BOOL IsSystemRenderPin(ULONG nPinId);
+
+    BOOL IsSystemCapturePin(ULONG nPinId);
+
+    BOOL IsBridgePin(ULONG nPinId);
+
+    // These three pins are the pins used by the audio engine for host, loopback, and offload.
+    ULONG GetSystemPinId()
+    {
+        ASSERT(IsRenderDevice());
+        return KSPIN_WAVE_RENDER2_SINK_SYSTEM;
+    }
+};
+
+typedef CMiniportWaveRT *PCMiniportWaveRT;
+
+#endif // _SIMPLEAUDIOSAMPLE_MINWAVERT_H_
diff --git a/audio/simpleaudiosample/Source/Main/minwavertstream.cpp b/audio/simpleaudiosample/Source/Main/minwavertstream.cpp
new file mode 100644
index 00000000..27289a0e
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Main/minwavertstream.cpp
@@ -0,0 +1,1644 @@
+#include "definitions.h"
+#include <limits.h>
+#include <ks.h>
+#include "endpoints.h"
+#include "minwavert.h"
+#include "minwavertstream.h"
+#define MINWAVERTSTREAM_POOLTAG 'SRWM'
+
+#pragma warning (disable : 4127)
+
+//=============================================================================
+// CMiniportWaveRTStream
+//=============================================================================
+
+//=============================================================================
+#pragma code_seg("PAGE")
+CMiniportWaveRTStream::~CMiniportWaveRTStream
+( 
+    void 
+)
+/*++
+
+Routine Description:
+
+  Destructor for wavertstream 
+
+Arguments:
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+    if (NULL != m_pMiniport)
+    {
+    
+        if (m_bUnregisterStream)
+        {
+            m_pMiniport->StreamClosed(m_ulPin, this);
+            m_bUnregisterStream = FALSE;
+        }
+        
+        m_pMiniport->Release();
+        m_pMiniport = NULL;
+    }
+
+    if (m_pDpc)
+    {
+        ExFreePoolWithTag( m_pDpc, MINWAVERTSTREAM_POOLTAG );
+        m_pDpc = NULL;
+    }
+
+    if (m_pTimer)
+    {
+        ExFreePoolWithTag( m_pTimer, MINWAVERTSTREAM_POOLTAG );
+        m_pTimer = NULL;
+    }
+
+    if (m_pbMuted)
+    {
+        ExFreePoolWithTag( m_pbMuted, MINWAVERTSTREAM_POOLTAG );
+        m_pbMuted = NULL;
+    }
+
+    if (m_plVolumeLevel)
+    {
+        ExFreePoolWithTag( m_plVolumeLevel, MINWAVERTSTREAM_POOLTAG );
+        m_plVolumeLevel = NULL;
+    }
+
+    if (m_plPeakMeter)
+    {
+        ExFreePoolWithTag( m_plPeakMeter, MINWAVERTSTREAM_POOLTAG );
+        m_plPeakMeter = NULL;
+    }
+
+    if (m_pWfExt)
+    {
+        ExFreePoolWithTag( m_pWfExt, MINWAVERTSTREAM_POOLTAG );
+        m_pWfExt = NULL;
+    }
+    if (m_pNotificationTimer)
+    {
+        ExDeleteTimer
+        (
+            m_pNotificationTimer, 
+            TRUE, // Cancel the timer if it is currently set.
+            TRUE, // Wait for the timer to finish expiring and for any callback to a ExTimerCallback routine to finish.
+            NULL
+         );
+    }
+
+    // Since we just cancelled the notification timer, wait for all queued 
+    // DPCs to complete before we free the notification DPC.
+    //
+    KeFlushQueuedDpcs();
+
+    DPF_ENTER(("[CMiniportWaveRTStream::~CMiniportWaveRTStream]"));
+} // ~CMiniportWaveRTStream
+
+//=============================================================================
+#pragma code_seg("PAGE")
+
+NTSTATUS CMiniportWaveRTStream::ReadRegistrySettings()
+{
+    PAGED_CODE();
+
+    NTSTATUS                    ntStatus;
+    UNICODE_STRING              parametersPath;
+
+    RTL_QUERY_REGISTRY_TABLE    paramTable[] = {
+        // QueryRoutine     Flags                                               Name                            EntryContext                            DefaultType                                                     DefaultData                                 DefaultLength
+        { NULL,   RTL_QUERY_REGISTRY_DIRECT | RTL_QUERY_REGISTRY_TYPECHECK, L"HostCaptureToneFrequency",        &m_ulHostCaptureToneFrequency,          (REG_DWORD << RTL_QUERY_REGISTRY_TYPECHECK_SHIFT) | REG_DWORD,  &m_ulHostCaptureToneFrequency,              sizeof(DWORD) },
+        { NULL,   RTL_QUERY_REGISTRY_DIRECT | RTL_QUERY_REGISTRY_TYPECHECK, L"HostCaptureToneAmplitude",        &m_dwHostCaptureToneAmplitude,          (REG_DWORD << RTL_QUERY_REGISTRY_TYPECHECK_SHIFT) | REG_DWORD,  &m_dwHostCaptureToneAmplitude,              sizeof(DWORD) },
+        { NULL,   RTL_QUERY_REGISTRY_DIRECT | RTL_QUERY_REGISTRY_TYPECHECK, L"HostCaptureToneDCOffset",         &m_dwHostCaptureToneDCOffset,           (REG_DWORD << RTL_QUERY_REGISTRY_TYPECHECK_SHIFT) | REG_DWORD,  &m_dwHostCaptureToneDCOffset,               sizeof(DWORD) },
+        { NULL,   RTL_QUERY_REGISTRY_DIRECT | RTL_QUERY_REGISTRY_TYPECHECK, L"HostCaptureToneInitialPhase",     &m_dwHostCaptureToneInitialPhase,       (REG_DWORD << RTL_QUERY_REGISTRY_TYPECHECK_SHIFT) | REG_DWORD,  &m_dwHostCaptureToneInitialPhase,           sizeof(DWORD) },
+        { NULL,   0,                                                        NULL,                               NULL,                                   0,                                                              NULL,                                       0 }
+    };
+
+    RtlInitUnicodeString(&parametersPath, NULL);
+
+    // The sizeof(WCHAR) is added to the maximum length, for allowing a space for null termination of the string.
+    parametersPath.MaximumLength =
+        g_RegistryPath.Length + sizeof(L"\\Parameters") + sizeof(WCHAR);
+
+    parametersPath.Buffer = (PWCH)ExAllocatePool2(POOL_FLAG_PAGED, parametersPath.MaximumLength, MINWAVERT_POOLTAG);
+    if (parametersPath.Buffer == NULL)
+    {
+        return STATUS_INSUFFICIENT_RESOURCES;
+    }
+
+    RtlAppendUnicodeToString(&parametersPath, g_RegistryPath.Buffer);
+    RtlAppendUnicodeToString(&parametersPath, L"\\Parameters");
+
+    ntStatus = RtlQueryRegistryValues(
+        RTL_REGISTRY_ABSOLUTE | RTL_REGISTRY_OPTIONAL,
+        parametersPath.Buffer,
+        &paramTable[0],
+        NULL,
+        NULL
+    );
+
+    ExFreePool(parametersPath.Buffer);
+
+    return ntStatus;
+}
+
+NTSTATUS
+CMiniportWaveRTStream::Init
+( 
+    _In_ PCMiniportWaveRT           Miniport_,
+    _In_ PPORTWAVERTSTREAM          PortStream_,
+    _In_ ULONG                      Pin_,
+    _In_ BOOLEAN                    Capture_,
+    _In_ PKSDATAFORMAT              DataFormat_,
+    _In_ GUID                       SignalProcessingMode
+)
+/*++
+
+Routine Description:
+
+  Initializes the stream object.
+
+Arguments:
+
+  Miniport_ -
+
+  Pin_ -
+
+  DataFormat -
+
+  SignalProcessingMode - The driver uses the signalProcessingMode to configure
+    driver and/or hardware specific signal processing to be applied to this new
+    stream.
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    PWAVEFORMATEX pWfEx = NULL;
+    NTSTATUS ntStatus = STATUS_SUCCESS;
+
+    m_pMiniport = NULL;
+    m_ulPin = 0;
+    m_bUnregisterStream = FALSE;
+    m_bCapture = FALSE;
+    m_ulDmaBufferSize = 0;
+    m_pDmaBuffer = NULL;
+    m_ulNotificationsPerBuffer = 0;
+    m_KsState = KSSTATE_STOP;
+    m_pTimer = NULL;
+    m_pDpc = NULL;
+    m_llPacketCounter = 0;
+    m_ullPlayPosition = 0;
+    m_ullWritePosition = 0;
+    m_ullDmaTimeStamp = 0;
+    m_hnsElapsedTimeCarryForward = 0;
+    m_ullLastDPCTimeStamp = 0;
+    m_hnsDPCTimeCarryForward = 0;
+    m_ulDmaMovementRate = 0;
+    m_byteDisplacementCarryForward = 0;
+    m_bLfxEnabled = FALSE;
+    m_pbMuted = NULL;
+    m_plVolumeLevel = NULL;
+    m_plPeakMeter = NULL;
+    m_pWfExt = NULL;
+    m_ullLinearPosition = 0;
+    m_ullPresentationPosition = 0;
+    m_ulContentId = 0;
+    m_ulCurrentWritePosition = 0;
+    m_ulLastOsReadPacket = ULONG_MAX;
+    m_ulLastOsWritePacket = ULONG_MAX;
+    m_IsCurrentWritePositionUpdated = 0;
+    m_SignalProcessingMode = SignalProcessingMode;
+    m_bEoSReceived = FALSE;
+    m_bLastBufferRendered = FALSE;
+
+    m_ulHostCaptureToneFrequency = IsEqualGUID(SignalProcessingMode, AUDIO_SIGNALPROCESSINGMODE_RAW) ? 1000 : 2000;
+    m_dwHostCaptureToneAmplitude = 50;
+    m_dwHostCaptureToneDCOffset = 0;
+    m_dwHostCaptureToneInitialPhase = 0;
+
+    m_pPortStream = PortStream_;
+    InitializeListHead(&m_NotificationList);
+    m_ulNotificationIntervalMs = 0;
+
+    // Initialize the spinlock to synchronize position updates
+    KeInitializeSpinLock(&m_PositionSpinLock);
+
+    m_pNotificationTimer = ExAllocateTimer(
+         TimerNotifyRT,
+         this,
+         EX_TIMER_HIGH_RESOLUTION
+    );
+    if (!m_pNotificationTimer)
+    {
+        return STATUS_INSUFFICIENT_RESOURCES;
+    }
+
+    pWfEx = GetWaveFormatEx(DataFormat_);
+    if (NULL == pWfEx) 
+    { 
+        return STATUS_UNSUCCESSFUL; 
+    }
+
+    m_pMiniport = reinterpret_cast<CMiniportWaveRT*>(Miniport_);
+    if (m_pMiniport == NULL)
+    {
+        return STATUS_INVALID_PARAMETER;
+    }
+    m_pMiniport->AddRef();
+    if (!NT_SUCCESS(ntStatus))
+    {
+        return ntStatus;
+    }
+    m_ulPin = Pin_;
+    m_bCapture = Capture_;
+    m_ulDmaMovementRate = pWfEx->nAvgBytesPerSec;
+
+    m_pDpc = (PRKDPC)ExAllocatePool2(POOL_FLAG_NON_PAGED, sizeof(KDPC), MINWAVERTSTREAM_POOLTAG);
+    if (!m_pDpc)
+    {
+        return STATUS_INSUFFICIENT_RESOURCES;
+    }
+
+    m_pWfExt = (PWAVEFORMATEXTENSIBLE)ExAllocatePool2(POOL_FLAG_NON_PAGED, sizeof(WAVEFORMATEX) + pWfEx->cbSize, MINWAVERTSTREAM_POOLTAG);
+    if (m_pWfExt == NULL)
+    {
+        return STATUS_INSUFFICIENT_RESOURCES;
+    }
+    RtlCopyMemory(m_pWfExt, pWfEx, sizeof(WAVEFORMATEX) + pWfEx->cbSize);
+
+    m_pbMuted = (PBOOL)ExAllocatePool2(POOL_FLAG_NON_PAGED, m_pWfExt->Format.nChannels * sizeof(BOOL), MINWAVERTSTREAM_POOLTAG);
+    if (m_pbMuted == NULL)
+    {
+        return STATUS_INSUFFICIENT_RESOURCES;
+    }
+
+    m_plVolumeLevel = (PLONG)ExAllocatePool2(POOL_FLAG_NON_PAGED, m_pWfExt->Format.nChannels * sizeof(LONG), MINWAVERTSTREAM_POOLTAG);
+    if (m_plVolumeLevel == NULL)
+    {
+        return STATUS_INSUFFICIENT_RESOURCES;
+    }
+
+    m_plPeakMeter = (PLONG)ExAllocatePool2(POOL_FLAG_NON_PAGED, m_pWfExt->Format.nChannels * sizeof(LONG), MINWAVERTSTREAM_POOLTAG);
+    if (m_plPeakMeter == NULL)
+    {
+        return STATUS_INSUFFICIENT_RESOURCES;
+    }
+
+    if (m_bCapture)
+    {
+        ReadRegistrySettings();
+        DWORD toneFrequency = 0;
+        DWORD toneAmplitude = 0;
+        DWORD toneDCOffset = 0;
+        DWORD toneInitialPhase = 0;
+
+        double toneAmplitudeDouble = 0;
+        double toneDCOffsetDouble = 0;
+        double toneInitialPhaseDouble = 0;
+
+        toneFrequency = m_ulHostCaptureToneFrequency;
+        toneAmplitude = m_dwHostCaptureToneAmplitude;
+        toneDCOffset = m_dwHostCaptureToneDCOffset;
+        toneInitialPhase = m_dwHostCaptureToneInitialPhase;
+
+        if (labs(toneAmplitude) > 100)
+        {
+            toneAmplitude = toneAmplitude > 0 ? 100 : -100;
+        }
+
+        if (labs(toneDCOffset) > 100)
+        {
+            toneDCOffset = toneDCOffset > 0 ? 100 : -100;
+        }
+
+        DWORD abssum = labs(toneAmplitude) + labs(toneDCOffset);
+
+        if (abssum > 100)
+        {
+            toneAmplitudeDouble = ((double)toneAmplitude) / abssum;
+            toneDCOffsetDouble = ((double)toneDCOffset) / abssum;
+        }
+        else
+        {
+            toneAmplitudeDouble = ((double)toneAmplitude) / 100.0;
+            toneDCOffsetDouble = ((double)toneDCOffset) / 100.0;
+        }
+
+        if (labs(toneInitialPhase) > 31416)
+        {
+            toneInitialPhase = toneInitialPhase > 0 ? 31416 : -31416;
+        }
+
+        toneInitialPhaseDouble = (double)toneInitialPhase / 10000;
+
+        ntStatus = m_ToneGenerator.Init(toneFrequency, toneAmplitudeDouble, toneDCOffsetDouble, toneInitialPhaseDouble, m_pWfExt);
+
+        if (!NT_SUCCESS(ntStatus))
+        {
+            return ntStatus;
+        }
+    }
+    else if (!g_DoNotCreateDataFiles)
+    {
+        //
+        // Create an output file for the render data.
+        //
+        DPF(D_TERSE, ("SaveData %p", &m_SaveData));
+        ntStatus = m_SaveData.SetDataFormat(DataFormat_);
+        if (NT_SUCCESS(ntStatus))
+        {
+            ntStatus = m_SaveData.Initialize();
+        }
+    
+        if (!NT_SUCCESS(ntStatus))
+        {
+            return ntStatus;
+        }
+    }
+
+    //
+    // Register this stream.
+    //
+    ntStatus = m_pMiniport->StreamCreated(m_ulPin, this);
+    if (NT_SUCCESS(ntStatus))
+    {
+        m_bUnregisterStream = TRUE;
+    }
+
+    return ntStatus;
+} // Init
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP_(NTSTATUS)
+CMiniportWaveRTStream::NonDelegatingQueryInterface
+( 
+    _In_ REFIID  Interface,
+    _COM_Outptr_ PVOID * Object 
+)
+/*++
+
+Routine Description:
+
+  QueryInterface
+
+Arguments:
+
+  Interface - GUID
+
+  Object - interface pointer to be returned
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    ASSERT(Object);
+
+    if (IsEqualGUIDAligned(Interface, IID_IUnknown))
+    {
+        *Object = PVOID(PUNKNOWN(PMINIPORTWAVERTSTREAM(this)));
+    }
+    else if (IsEqualGUIDAligned(Interface, IID_IMiniportWaveRTStream))
+    {
+        *Object = PVOID(PMINIPORTWAVERTSTREAM(this));
+    }
+    else if (IsEqualGUIDAligned(Interface, IID_IMiniportWaveRTStreamNotification))
+    {
+        *Object = PVOID(PMINIPORTWAVERTSTREAMNOTIFICATION(this));
+    }
+    else if (IsEqualGUIDAligned(Interface, IID_IMiniportWaveRTInputStream) && (this->m_bCapture))
+    {
+        // This interface is supported only on capture streams
+        *Object = PVOID(PMINIPORTWAVERTINPUTSTREAM(this));
+    }
+    else if (IsEqualGUIDAligned(Interface, IID_IMiniportWaveRTOutputStream))
+    {
+        // This interface is supported only on host render streams
+        *Object = PVOID(PMINIPORTWAVERTOUTPUTSTREAM(this));
+    }
+    else if (IsEqualGUIDAligned(Interface, IID_IDrmAudioStream))
+    {
+        *Object = (PVOID)(IDrmAudioStream*)this;
+    }
+    else
+    {
+        *Object = NULL;
+    }
+
+    if (*Object)
+    {
+        PUNKNOWN(*Object)->AddRef();
+        return STATUS_SUCCESS;
+    }
+
+    return STATUS_INVALID_PARAMETER;
+} // NonDelegatingQueryInterface
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS CMiniportWaveRTStream::AllocateBufferWithNotification
+(
+    _In_    ULONG               NotificationCount_,
+    _In_    ULONG               RequestedSize_,
+    _Out_   PMDL                *AudioBufferMdl_,
+    _Out_   ULONG               *ActualSize_,
+    _Out_   ULONG               *OffsetFromFirstPage_,
+    _Out_   MEMORY_CACHING_TYPE *CacheType_
+)
+{
+    PAGED_CODE();
+
+    ULONG ulBufferDurationMs = 0;
+
+    if ( (0 == RequestedSize_) || (RequestedSize_ < m_pWfExt->Format.nBlockAlign) )
+    { 
+        return STATUS_UNSUCCESSFUL; 
+    }
+    
+    if ((NotificationCount_ == 0) || (RequestedSize_ % NotificationCount_ != 0))
+    {
+        return STATUS_INVALID_PARAMETER;
+    }
+
+    RequestedSize_ -= RequestedSize_ % (m_pWfExt->Format.nBlockAlign);
+    
+    if (!m_bCapture && (!g_DoNotCreateDataFiles))
+    {
+        NTSTATUS ntStatus;
+        
+        // Simple Audio Sample uses following buffer to hold data before writing to a file.
+        // Allocating larger buffer will reduce File I/O operations.
+        ntStatus = m_SaveData.SetMaxWriteSize(RequestedSize_ * 4);
+        if (!NT_SUCCESS(ntStatus))
+        {
+            return ntStatus;
+        }
+    }
+
+    PHYSICAL_ADDRESS highAddress;
+    highAddress.HighPart = 0;
+    highAddress.LowPart = MAXULONG;
+
+    PMDL pBufferMdl = m_pPortStream->AllocatePagesForMdl (highAddress, RequestedSize_);
+
+    if (NULL == pBufferMdl)
+    {
+        return STATUS_UNSUCCESSFUL;
+    }
+
+    // From MSDN: 
+    // "Since the Windows audio stack does not support a mechanism to express memory access 
+    //  alignment requirements for buffers, audio drivers must select a caching type for mapped
+    //  memory buffers that does not impose platform-specific alignment requirements. In other 
+    //  words, the caching type used by the audio driver for mapped memory buffers, must not make 
+    //  assumptions about the memory alignment requirements for any specific platform.
+    //
+    //  This method maps the physical memory pages in the MDL into kernel-mode virtual memory. 
+    //  Typically, the miniport driver calls this method if it requires software access to the 
+    //  scatter-gather list for an audio buffer. In this case, the storage for the scatter-gather 
+    //  list must have been allocated by the IPortWaveRTStream::AllocatePagesForMdl or 
+    //  IPortWaveRTStream::AllocateContiguousPagesForMdl method. 
+    //
+    //  A WaveRT miniport driver should not require software access to the audio buffer itself."
+    //   
+    m_pDmaBuffer = (BYTE*)m_pPortStream->MapAllocatedPages(pBufferMdl, MmCached);
+    m_ulNotificationsPerBuffer = NotificationCount_;
+    m_ulDmaBufferSize = RequestedSize_;
+    ulBufferDurationMs = (RequestedSize_ * 1000) / m_ulDmaMovementRate;
+    m_ulNotificationIntervalMs = ulBufferDurationMs / NotificationCount_;
+
+    *AudioBufferMdl_ = pBufferMdl;
+    *ActualSize_ = RequestedSize_;
+    *OffsetFromFirstPage_ = 0;
+    *CacheType_ = MmCached;
+
+    return STATUS_SUCCESS;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+VOID CMiniportWaveRTStream::FreeBufferWithNotification
+(
+    _In_        PMDL    Mdl_,
+    _In_        ULONG   Size_
+)
+{
+    UNREFERENCED_PARAMETER(Size_);
+
+    PAGED_CODE();
+
+    if (Mdl_ != NULL)
+    {
+        if (m_pDmaBuffer != NULL)
+        {
+            m_pPortStream->UnmapAllocatedPages(m_pDmaBuffer, Mdl_);
+            m_pDmaBuffer = NULL;
+        }
+        
+        m_pPortStream->FreePagesFromMdl(Mdl_);
+    }
+    
+    m_ulDmaBufferSize = 0;
+    m_ulNotificationsPerBuffer = 0;
+
+    return;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS CMiniportWaveRTStream::RegisterNotificationEvent
+(
+    _In_ PKEVENT NotificationEvent_
+)
+{
+    UNREFERENCED_PARAMETER(NotificationEvent_);
+
+    PAGED_CODE();
+
+    NotificationListEntry *nleNew = (NotificationListEntry*)ExAllocatePool2( 
+        POOL_FLAG_NON_PAGED,
+        sizeof(NotificationListEntry),
+        MINWAVERTSTREAM_POOLTAG);
+    if (NULL == nleNew)
+    {
+        return STATUS_INSUFFICIENT_RESOURCES;
+    }
+
+    nleNew->NotificationEvent = NotificationEvent_;
+
+    // Fail if the notification event already exists in our list.
+    if (!IsListEmpty(&m_NotificationList))
+    {
+        PLIST_ENTRY leCurrent = m_NotificationList.Flink;
+        while (leCurrent != &m_NotificationList)
+        {
+            NotificationListEntry* nleCurrent = CONTAINING_RECORD( leCurrent, NotificationListEntry, ListEntry);
+            if (nleCurrent->NotificationEvent == NotificationEvent_)
+            {
+                ExFreePoolWithTag( nleNew, MINWAVERTSTREAM_POOLTAG );
+                return STATUS_UNSUCCESSFUL;
+            }
+
+            leCurrent = leCurrent->Flink;
+        }
+    }
+
+    InsertTailList(&m_NotificationList, &(nleNew->ListEntry));
+    
+    return STATUS_SUCCESS;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS CMiniportWaveRTStream::UnregisterNotificationEvent
+(
+    _In_ PKEVENT NotificationEvent_
+)
+{
+    UNREFERENCED_PARAMETER(NotificationEvent_);
+
+    PAGED_CODE();
+
+    if (!IsListEmpty(&m_NotificationList))
+    {
+        PLIST_ENTRY leCurrent = m_NotificationList.Flink;
+        while (leCurrent != &m_NotificationList)
+        {
+            NotificationListEntry* nleCurrent = CONTAINING_RECORD( leCurrent, NotificationListEntry, ListEntry);
+            if (nleCurrent->NotificationEvent == NotificationEvent_)
+            {
+                RemoveEntryList( leCurrent );
+                ExFreePoolWithTag( nleCurrent, MINWAVERTSTREAM_POOLTAG );
+                return STATUS_SUCCESS;
+            }
+
+            leCurrent = leCurrent->Flink;
+        }
+    }
+
+    return STATUS_NOT_FOUND;
+}
+
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS CMiniportWaveRTStream::GetClockRegister
+(
+    _Out_ PKSRTAUDIO_HWREGISTER Register_
+)
+{
+    UNREFERENCED_PARAMETER(Register_);
+
+    PAGED_CODE();
+
+    return STATUS_NOT_IMPLEMENTED;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS CMiniportWaveRTStream::GetPositionRegister
+(
+    _Out_ PKSRTAUDIO_HWREGISTER Register_
+)
+{
+    UNREFERENCED_PARAMETER(Register_);
+
+    PAGED_CODE();
+
+    return STATUS_NOT_IMPLEMENTED;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+VOID CMiniportWaveRTStream::GetHWLatency
+(
+    _Out_ PKSRTAUDIO_HWLATENCY  Latency_
+)
+{
+    PAGED_CODE();
+
+    ASSERT(Latency_);
+
+    Latency_->ChipsetDelay = 0;
+    Latency_->CodecDelay = 0;
+    Latency_->FifoSize = 0;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+VOID CMiniportWaveRTStream::FreeAudioBuffer
+(
+_In_opt_    PMDL        Mdl_,
+_In_        ULONG       Size_
+)
+{
+    UNREFERENCED_PARAMETER(Size_);
+
+    PAGED_CODE();
+
+    if (Mdl_ != NULL)
+    {
+        if (m_pDmaBuffer != NULL)
+        {
+            m_pPortStream->UnmapAllocatedPages(m_pDmaBuffer, Mdl_);
+            m_pDmaBuffer = NULL;
+        }
+
+        m_pPortStream->FreePagesFromMdl(Mdl_);
+    }
+
+    m_ulDmaBufferSize = 0;
+    m_ulNotificationsPerBuffer = 0;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS CMiniportWaveRTStream::AllocateAudioBuffer
+(
+_In_    ULONG                   RequestedSize_,
+_Out_   PMDL                   *AudioBufferMdl_,
+_Out_   ULONG                  *ActualSize_,
+_Out_   ULONG                  *OffsetFromFirstPage_,
+_Out_   MEMORY_CACHING_TYPE    *CacheType_
+)
+{
+    PAGED_CODE();
+
+    if ((0 == RequestedSize_) || (RequestedSize_ < m_pWfExt->Format.nBlockAlign))
+    {
+        return STATUS_UNSUCCESSFUL;
+    }
+
+    RequestedSize_ -= RequestedSize_ % (m_pWfExt->Format.nBlockAlign);
+
+    PHYSICAL_ADDRESS highAddress;
+    highAddress.HighPart = 0;
+    highAddress.LowPart = MAXULONG;
+
+    PMDL pBufferMdl = m_pPortStream->AllocatePagesForMdl(highAddress, RequestedSize_);
+
+    if (NULL == pBufferMdl)
+    {
+        return STATUS_UNSUCCESSFUL;
+    }
+
+    // From MSDN: 
+    // "Since the Windows audio stack does not support a mechanism to express memory access 
+    //  alignment requirements for buffers, audio drivers must select a caching type for mapped
+    //  memory buffers that does not impose platform-specific alignment requirements. In other 
+    //  words, the caching type used by the audio driver for mapped memory buffers, must not make 
+    //  assumptions about the memory alignment requirements for any specific platform.
+    //
+    //  This method maps the physical memory pages in the MDL into kernel-mode virtual memory. 
+    //  Typically, the miniport driver calls this method if it requires software access to the 
+    //  scatter-gather list for an audio buffer. In this case, the storage for the scatter-gather 
+    //  list must have been allocated by the IPortWaveRTStream::AllocatePagesForMdl or 
+    //  IPortWaveRTStream::AllocateContiguousPagesForMdl method. 
+    //
+    //  A WaveRT miniport driver should not require software access to the audio buffer itself."
+    //   
+    m_pDmaBuffer = (BYTE*)m_pPortStream->MapAllocatedPages(pBufferMdl, MmCached);
+
+    m_ulDmaBufferSize = RequestedSize_;
+    m_ulNotificationsPerBuffer = 0;
+
+    *AudioBufferMdl_ = pBufferMdl;
+    *ActualSize_ = RequestedSize_;
+    *OffsetFromFirstPage_ = 0;
+    *CacheType_ = MmCached;
+
+    return STATUS_SUCCESS;
+}
+
+//=============================================================================
+#pragma code_seg()
+NTSTATUS CMiniportWaveRTStream::GetPosition
+(
+    _Out_   KSAUDIO_POSITION    *Position_
+)
+{
+    NTSTATUS ntStatus;
+
+    KIRQL oldIrql;
+    KeAcquireSpinLock(&m_PositionSpinLock, &oldIrql);
+
+    if (m_KsState == KSSTATE_RUN)
+    {
+        //
+        // Get the current time and update position.
+        //
+        LARGE_INTEGER ilQPC = KeQueryPerformanceCounter(NULL);
+        UpdatePosition(ilQPC);
+    }
+
+    Position_->PlayOffset = m_ullPlayPosition;
+    Position_->WriteOffset = m_ullWritePosition;
+
+    KeReleaseSpinLock(&m_PositionSpinLock, oldIrql);
+
+    ntStatus = STATUS_SUCCESS;
+    
+    return ntStatus;
+}
+
+//=============================================================================
+// CMiniportWaveRTStream::GetReadPacket
+//
+//  Returns information about the next packet for the OS to read.
+//
+// Return value
+//
+//  Returns STATUS_DEVICE_NOT_READY if no new packets are available.
+//
+// IRQL - PASSIVE_LEVEL
+//
+// Remarks
+//  Although called at passive level, this routine is non-paged code because
+//  it is called in the streaming path where page faults should be avoided.
+//
+// ISSUE-2014/10/4 Will this work correctly across pause/play?
+#pragma code_seg()
+_IRQL_requires_max_(PASSIVE_LEVEL)
+NTSTATUS CMiniportWaveRTStream::GetReadPacket
+(
+    _Out_ ULONG* PacketNumber,
+    _Out_ DWORD* Flags,
+    _Out_ ULONG64* PerformanceCounterValue,
+    _Out_ BOOL* MoreData
+)
+{
+    ULONG availablePacketNumber;
+    ULONG droppedPackets;
+
+    // The call must be from event driven mode
+    if (m_ulNotificationsPerBuffer == 0)
+    {
+        return STATUS_NOT_SUPPORTED;
+    }
+
+    *Flags = 0;
+
+    if (m_KsState < KSSTATE_PAUSE)
+    {
+        return STATUS_INVALID_DEVICE_STATE;
+    }
+
+    KIRQL oldIrql;
+    KeAcquireSpinLock(&m_PositionSpinLock, &oldIrql);
+
+    LONGLONG packetCounter = m_llPacketCounter;
+    ULONGLONG ullLinearPosition = m_ullLinearPosition;
+    ULONGLONG hnsElapsedTimeCarryForward = m_hnsElapsedTimeCarryForward;
+    ULONGLONG ullDmaTimeStamp = m_ullDmaTimeStamp;
+
+    KeReleaseSpinLock(&m_PositionSpinLock, oldIrql);
+
+    // The 0-based number of the last completed packet
+    // FUTURE-2014/10/27 Update to allow different numbers of packets per WaveRT buffer
+    availablePacketNumber = LODWORD(packetCounter - 1);  // Note this might be ULONG_MAX if called during the first packet
+
+    // If no new packets are available...
+    if (availablePacketNumber == m_ulLastOsReadPacket)
+    {
+        return STATUS_DEVICE_NOT_READY;
+    }
+
+    // If more than one packet has transferred since the last packet read by
+    // the OS, then those were dropped. That is, a glitch occurred.
+    droppedPackets = availablePacketNumber - m_ulLastOsReadPacket - 1;
+    if (droppedPackets > 0)
+    {
+        // Trace a glitch
+    }
+
+    // Return next packet number to be read
+    *PacketNumber = availablePacketNumber;
+
+    // Compute and return timestamp corresponding to the end of the available packet. In a real hardware
+    // driver, the timestamp would be computed in a driver and hardware specific manner. In this sample
+    // driver, it is extrapolated from the sample driver's internal simulated position correlation
+    // [m_ullLinearPosition @ m_ullDmaTimeStamp] and the sample's internal 64-bit packet counter, subtracting
+    // 1 from the packet counter to compute the time at the start of that last completed packet.
+    ULONGLONG linearPositionOfAvailablePacket = packetCounter * (m_ulDmaBufferSize / m_ulNotificationsPerBuffer);
+    // Need to divide by (1000 * 10000 because m_ulDmaMovementRate is average bytes per sec
+    ULONGLONG carryForwardBytes = (hnsElapsedTimeCarryForward * m_ulDmaMovementRate) / 10000000;
+    ULONGLONG deltaLinearPosition = ullLinearPosition + carryForwardBytes - linearPositionOfAvailablePacket;
+    ULONGLONG deltaTimeInHns = deltaLinearPosition * 10000000 / m_ulDmaMovementRate;
+    ULONGLONG timeOfAvailablePacketInHns = ullDmaTimeStamp - deltaTimeInHns;
+    ULONGLONG timeOfAvailablePacketInQpc = timeOfAvailablePacketInHns * m_ullPerformanceCounterFrequency.QuadPart / 10000000;
+
+    *PerformanceCounterValue = timeOfAvailablePacketInQpc;
+
+    // No flags are defined yet
+    *Flags = 0;
+
+    // This sample does not internally buffer data so there is never more data
+    // than revealed by the results from this routine.
+    *MoreData = FALSE;
+
+    // Update the last packet read by the OS
+    m_ulLastOsReadPacket = availablePacketNumber;
+
+    return STATUS_SUCCESS;
+}
+
+#pragma code_seg()
+_IRQL_requires_max_(PASSIVE_LEVEL)
+NTSTATUS CMiniportWaveRTStream::SetWritePacket
+(
+    _In_ ULONG      PacketNumber,
+    _In_ DWORD      Flags,
+    _In_ ULONG      EosPacketLength
+)
+{
+    UNREFERENCED_PARAMETER(EosPacketLength);
+    NTSTATUS ntStatus;
+
+    // The call must be from event driven mode
+    if (m_ulNotificationsPerBuffer == 0)
+    {
+        return STATUS_NOT_SUPPORTED;
+    }
+
+    ULONG oldLastOsWritePacket = m_ulLastOsWritePacket;
+
+    // This function should not be called once EoS has been set.
+    if (m_bEoSReceived)
+    {
+        return STATUS_INVALID_DEVICE_STATE;
+    }
+
+    KIRQL oldIrql;
+    KeAcquireSpinLock(&m_PositionSpinLock, &oldIrql);
+    // 1-based count of completed packets, 0-based packet number of current packet
+    LONGLONG currentPacket = m_llPacketCounter;
+    KeReleaseSpinLock(&m_PositionSpinLock, oldIrql);
+
+    // If not running, the current packet hasn't actually started transfering so OS should be writing
+    // to the current packet. If running, then the current packing is already transfering to hardware
+    // so the OS should write the packet after the current packet.
+    ULONG expectedPacket = LODWORD(currentPacket);
+    if (m_KsState == KSSTATE_RUN)
+    {
+        expectedPacket++;
+    }
+
+    // Check if OS PacketNumber is behind or too far ahead of current packet
+    LONG deltaFromExpectedPacket = PacketNumber - expectedPacket;   // Modulo arithemetic
+    if (deltaFromExpectedPacket < 0)
+    {
+        return STATUS_DATA_LATE_ERROR;
+    }
+    else if (deltaFromExpectedPacket > 0)
+    {
+        return STATUS_DATA_OVERRUN;
+    }
+
+    ULONG packetSize = (m_ulDmaBufferSize / m_ulNotificationsPerBuffer);
+    ULONG packetIndex = PacketNumber % m_ulNotificationsPerBuffer;
+    ULONG ulCurrentWritePosition = packetIndex * packetSize;
+
+    // Check if EOS flag was passed
+    if (Flags & KSSTREAM_HEADER_OPTIONSF_ENDOFSTREAM)
+    {
+        return STATUS_INVALID_PARAMETER;
+    }
+    else
+    {
+        m_ulLastOsWritePacket = PacketNumber;
+
+        // This function sets the current write position to the specified byte in the DMA buffer.
+        // Will check if the write position is smaller than the DMA buffer size.
+        // Will not return an error when the passed in parameter is 0.
+        // Will also check if this function was called with the same write position(in event mode only)
+        // Underruning will also be checked via timer mechanism
+        KeAcquireSpinLock(&m_PositionSpinLock, &oldIrql);
+        ntStatus = SetCurrentWritePositionInternal(ulCurrentWritePosition);
+        KeReleaseSpinLock(&m_PositionSpinLock, oldIrql);
+    }
+
+    if (!NT_SUCCESS(ntStatus))
+    {
+        m_ulLastOsWritePacket = oldLastOsWritePacket;
+    }
+
+    return ntStatus;
+}
+
+//=============================================================================
+#pragma code_seg()
+_IRQL_requires_max_(PASSIVE_LEVEL)
+NTSTATUS CMiniportWaveRTStream::GetOutputStreamPresentationPosition
+(
+    _Out_ KSAUDIO_PRESENTATION_POSITION *pPresentationPosition
+)
+{
+    ASSERT (pPresentationPosition);
+    
+    // The call must be from event driven mode
+    if(m_ulNotificationsPerBuffer == 0)
+    {
+        return STATUS_NOT_SUPPORTED;
+    }
+    
+    return GetPresentationPosition(pPresentationPosition);
+}
+
+//=============================================================================
+#pragma code_seg()
+_IRQL_requires_max_(PASSIVE_LEVEL)
+NTSTATUS CMiniportWaveRTStream::GetPacketCount
+(
+    _Out_ ULONG *pPacketCount
+)
+{
+    ASSERT(pPacketCount);
+
+    // The call must be from event driven mode
+    if(m_ulNotificationsPerBuffer == 0)
+    {
+        return STATUS_NOT_SUPPORTED;
+    }
+    
+    KIRQL oldIrql;
+    KeAcquireSpinLock(&m_PositionSpinLock, &oldIrql);
+
+    if (m_KsState == KSSTATE_RUN)
+    {
+        // Get the current time and update simulated position.
+        LARGE_INTEGER ilQPC = KeQueryPerformanceCounter(NULL);
+        UpdatePosition(ilQPC);
+    }
+
+    *pPacketCount = LODWORD(m_llPacketCounter);
+    KeReleaseSpinLock(&m_PositionSpinLock, oldIrql);
+
+    return STATUS_SUCCESS;
+}
+
+//linear and presentation positions
+#pragma code_seg()
+NTSTATUS CMiniportWaveRTStream::GetPositions(
+    _Out_opt_  ULONGLONG* _pullLinearBufferPosition,
+    _Out_opt_  ULONGLONG* _pullPresentationPosition,
+    _Out_opt_  LARGE_INTEGER* _pliQPCTime
+)
+{
+    DPF_ENTER(("[CMiniportWaveRTStream::GetPositions]"));
+
+    NTSTATUS        ntStatus;
+    LARGE_INTEGER   ilQPC;
+    KIRQL           oldIrql;
+
+    // Update *_pullLinearBufferPosition with the the number of bytes fetched from waveRT ever since a stream got set into RUN
+    // state.
+    // Once the stream is set to STOP state, any further read on this call would return zero.
+
+    //
+    // Get the current time and update position.
+    //
+    KeAcquireSpinLock(&m_PositionSpinLock, &oldIrql);
+    ilQPC = KeQueryPerformanceCounter(NULL);
+    if (m_KsState == KSSTATE_RUN)
+    {
+        UpdatePosition(ilQPC);
+    }
+    if (_pullLinearBufferPosition)
+    {
+        *_pullLinearBufferPosition = m_ullLinearPosition;
+    }
+    if (_pullPresentationPosition)
+    {
+        *_pullPresentationPosition = m_ullPresentationPosition;
+    }
+    KeReleaseSpinLock(&m_PositionSpinLock, oldIrql);
+    if (_pliQPCTime)
+    {
+        *_pliQPCTime = ilQPC;
+    }
+
+    ntStatus = STATUS_SUCCESS;
+
+    return ntStatus;
+}
+
+NTSTATUS CMiniportWaveRTStream::GetPresentationPosition(_Out_  KSAUDIO_PRESENTATION_POSITION* _pPresentationPosition)
+{
+    ASSERT(_pPresentationPosition);
+    LARGE_INTEGER timeStamp;
+
+    DPF_ENTER(("[CMiniportWaveRTStream::GetPresentationPosition]"));
+
+    ULONGLONG ullLinearPosition = { 0 };
+    ULONGLONG ullPresentationPosition = { 0 };
+    NTSTATUS status = STATUS_SUCCESS;
+
+    status = GetPositions(&ullLinearPosition, &ullPresentationPosition, &timeStamp);
+    if (!NT_SUCCESS(status))
+    {
+        return status;
+    }
+
+    _pPresentationPosition->u64PositionInBlocks = ullPresentationPosition * m_pWfExt->Format.nSamplesPerSec / m_pWfExt->Format.nAvgBytesPerSec;
+    _pPresentationPosition->u64QPCPosition = (UINT64)timeStamp.QuadPart;
+
+    return STATUS_SUCCESS;
+}
+
+#pragma code_seg()
+NTSTATUS CMiniportWaveRTStream::SetCurrentWritePositionInternal(_In_  ULONG _ulCurrentWritePosition)
+{
+    DPF_ENTER(("[CMiniportWaveRTStream::SetCurrentWritePositionInternal]"));
+
+    ASSERT(m_bEoSReceived == FALSE);
+
+    if (m_bEoSReceived)
+    {
+        return STATUS_INVALID_DEVICE_REQUEST;
+    }
+
+    if (_ulCurrentWritePosition > m_ulDmaBufferSize)
+    {
+        return STATUS_INVALID_DEVICE_REQUEST;
+    }
+
+    PADAPTERCOMMON pAdapterComm = m_pMiniport->GetAdapterCommObj();
+
+    //Event type: eMINIPORT_SET_WAVERT_BUFFER_WRITE_POSITION
+    //Parameter 1: Current linear buffer position    
+    //Parameter 2: Previous WaveRtBufferWritePosition that the driver received    
+    //Parameter 3: Target WaveRtBufferWritePosition received from portcls
+    //Parameter 4: 0
+    pAdapterComm->WriteEtwEvent(eMINIPORT_SET_WAVERT_BUFFER_WRITE_POSITION,
+        m_ullLinearPosition, // replace with the correct "Current linear buffer position"    
+        m_ulCurrentWritePosition,
+        _ulCurrentWritePosition, // this is new write position
+        0); // always zero
+
+//
+// Check for eMINIPORT_GLITCH_REPORT - Same WaveRT buffer write during event driven mode.
+//
+    if (m_ulNotificationIntervalMs > 0)
+    {
+        if (m_ulCurrentWritePosition == _ulCurrentWritePosition)
+        {
+            //Event type: eMINIPORT_GLITCH_REPORT
+            //Parameter 1: Current linear buffer position 
+            //Parameter 2: Previous WaveRtBufferWritePosition that the driver received 
+            //Parameter 3: Major glitch code: 3: Received same WaveRT buffer twice in a row during event driven mode
+            //Parameter 4: Minor code for the glitch cause
+            pAdapterComm->WriteEtwEvent(eMINIPORT_GLITCH_REPORT,
+                m_ullLinearPosition, // replace with the correct "Current linear buffer position"
+                m_ulCurrentWritePosition,
+                3, // received same WaveRT buffer twice in a row during event driven mode
+                _ulCurrentWritePosition);
+        }
+    }
+
+    m_ulCurrentWritePosition = _ulCurrentWritePosition;
+    InterlockedExchange(&m_IsCurrentWritePositionUpdated, 1);
+
+    return STATUS_SUCCESS;
+}
+
+//=============================================================================
+#pragma code_seg()
+NTSTATUS CMiniportWaveRTStream::SetState
+(
+    _In_    KSSTATE State_
+)
+{
+    NTSTATUS        ntStatus        = STATUS_SUCCESS;
+    KIRQL oldIrql;
+
+    // Spew an event for a pin state change request from portcls
+    //Event type: eMINIPORT_PIN_STATE
+    switch (State_)
+    {
+        case KSSTATE_STOP:
+            if (m_KsState == KSSTATE_ACQUIRE)
+            {
+                // Acquire stream resources
+            }
+            KeAcquireSpinLock(&m_PositionSpinLock, &oldIrql);
+            // Reset DMA
+            m_llPacketCounter = 0;
+            m_ullPlayPosition = 0;
+            m_ullWritePosition = 0;
+            m_ullLinearPosition = 0;
+            m_ullPresentationPosition = 0;
+            
+            // Reset OS read/write positions
+            m_ulLastOsReadPacket = ULONG_MAX;
+            m_ulCurrentWritePosition = 0;
+            m_ulLastOsWritePacket = ULONG_MAX;
+            m_bEoSReceived = FALSE;
+            m_bLastBufferRendered = FALSE;
+
+            KeReleaseSpinLock(&m_PositionSpinLock, oldIrql);
+
+            // Wait until all work items are completed.
+            if (!m_bCapture && !g_DoNotCreateDataFiles)
+            {
+                m_SaveData.WaitAllWorkItems();
+            }
+            break;
+
+        case KSSTATE_ACQUIRE:
+            if (m_KsState == KSSTATE_STOP)
+            {
+                // Acquire stream resources
+            }
+            break;
+            
+        case KSSTATE_PAUSE:
+
+            if (m_KsState > KSSTATE_PAUSE)
+            {
+                //
+                // Run -> Pause
+                //
+
+                // Pause DMA
+                if (m_ulNotificationIntervalMs > 0)
+                {
+                    ExCancelTimer(m_pNotificationTimer, NULL);
+                    KeFlushQueuedDpcs(); 
+
+                    // If pin is transitioning from RUN, save the time since last buffer completion event was sent 
+                    // so if the pin goes to RUN state again we can send the buffer completion event at correct time.
+                    if (m_ullLastDPCTimeStamp > 0)
+                    {
+                        LARGE_INTEGER qpc;
+                        LARGE_INTEGER qpcFrequency;
+                        LONGLONG  hnsCurrentTime;
+
+                        qpc = KeQueryPerformanceCounter(&qpcFrequency);
+
+                        // Convert ticks to 100ns units.
+                        hnsCurrentTime = KSCONVERT_PERFORMANCE_TIME(m_ullPerformanceCounterFrequency.QuadPart, qpc);
+                        m_hnsDPCTimeCarryForward = hnsCurrentTime - m_ullLastDPCTimeStamp + m_hnsDPCTimeCarryForward;
+                    }
+                }
+            }
+            // This call updates the linear buffer and presentation positions.
+            GetPositions(NULL, NULL, NULL);
+            break;
+
+        case KSSTATE_RUN:
+            // Start DMA
+            LARGE_INTEGER ullPerfCounterTemp;
+            ullPerfCounterTemp = KeQueryPerformanceCounter(&m_ullPerformanceCounterFrequency);
+            m_ullLastDPCTimeStamp = m_ullDmaTimeStamp = KSCONVERT_PERFORMANCE_TIME(m_ullPerformanceCounterFrequency.QuadPart, ullPerfCounterTemp);
+
+            if (m_ulNotificationIntervalMs > 0)
+            {
+                // Set timer for 1 ms. This will cause DPC to run every 1 ms but driver will send out 
+                // notification events only after notification interval. This timer is used by Simple Audio Sample to 
+                // emulate hardware and send out notification event. Real hardware should not use this
+                // timer to fire notification event as it will drain power if the timer is running at 1 msec.
+                ExSetTimer
+                (
+                    m_pNotificationTimer,
+                    (-1) * HNSTIME_PER_MILLISECOND,
+                    HNSTIME_PER_MILLISECOND, // 1 ms 
+                    NULL
+                 );
+
+            }
+
+            break;
+    }
+
+    m_KsState = State_;
+
+    return ntStatus;
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS CMiniportWaveRTStream::SetFormat
+(
+    _In_    KSDATAFORMAT    *DataFormat_
+)
+{
+    UNREFERENCED_PARAMETER(DataFormat_);
+
+    PAGED_CODE();
+
+    //if (!m_fCapture && !g_DoNotCreateDataFiles)
+    //{
+    //    ntStatus = m_SaveData.SetDataFormat(Format);
+    //}
+
+    return STATUS_NOT_SUPPORTED;
+}
+
+#pragma code_seg()
+
+//=============================================================================
+#pragma code_seg()
+VOID CMiniportWaveRTStream::UpdatePosition
+(
+    _In_ LARGE_INTEGER ilQPC
+)
+{
+    // Convert ticks to 100ns units.
+    LONGLONG  hnsCurrentTime = KSCONVERT_PERFORMANCE_TIME(m_ullPerformanceCounterFrequency.QuadPart, ilQPC);
+    
+    // Calculate the time elapsed since the last call to GetPosition() or since the
+    // DMA engine started.  Note that the division by 10000 to convert to milliseconds
+    // may cause us to lose some of the time, so we will carry the remainder forward 
+    // to the next GetPosition() call.
+    //
+    ULONG TimeElapsedInMS = (ULONG)(hnsCurrentTime - m_ullDmaTimeStamp + m_hnsElapsedTimeCarryForward)/10000;
+    
+    // Carry forward the remainder of this division so we don't fall behind with our position too much.
+    //
+    m_hnsElapsedTimeCarryForward = (hnsCurrentTime - m_ullDmaTimeStamp + m_hnsElapsedTimeCarryForward) % 10000;
+    
+    // Calculate how many bytes in the DMA buffer would have been processed in the elapsed
+    // time.  Note that the division by 1000 to convert to milliseconds may cause us to 
+    // lose some bytes, so we will carry the remainder forward to the next GetPosition() call.
+    //
+    // need to divide by 1000 because m_ulDmaMovementRate is average bytes per sec.
+
+    ULONG ByteDisplacement = ((m_ulDmaMovementRate * TimeElapsedInMS) + m_byteDisplacementCarryForward) / 1000 ;
+    m_byteDisplacementCarryForward = ((m_ulDmaMovementRate * TimeElapsedInMS) + m_byteDisplacementCarryForward) % 1000;
+
+    // Increment presentation position even after last buffer is rendered.
+    m_ullPresentationPosition += ByteDisplacement;
+
+    if (m_bCapture)
+    {
+        // Write sine wave to buffer.
+        WriteBytes(ByteDisplacement);
+    }
+    else
+    {
+
+        if (m_bEoSReceived)
+        {
+            // since EoS flag is set, we'll need to make sure not to read data beyond EOS position.
+            // If driver's current position is less than EoS position, then make sure not to read data beyond EoS.
+            if (m_ullWritePosition <= m_ulCurrentWritePosition)
+            {
+                ByteDisplacement = min(ByteDisplacement, m_ulCurrentWritePosition - (ULONG)m_ullWritePosition);
+            }
+            // If our current position is ahead of EoS position and we'll wrap around after new position then adjust
+            // new position if it crosses EoS.
+            else if ((m_ullWritePosition + ByteDisplacement) % m_ulDmaBufferSize < m_ullWritePosition)
+            {
+                if ((m_ullWritePosition + ByteDisplacement) % m_ulDmaBufferSize > m_ulCurrentWritePosition)
+                {
+                    ByteDisplacement = ByteDisplacement - (((ULONG)m_ullWritePosition + ByteDisplacement) % m_ulDmaBufferSize - m_ulCurrentWritePosition);
+                }
+            }
+        }
+
+        // If the last packet was rendered(read in the sample driver's case), send out an etw event.
+        if (m_bEoSReceived && !m_bLastBufferRendered
+            && (m_ullWritePosition + ByteDisplacement) % m_ulDmaBufferSize == m_ulCurrentWritePosition)
+        {
+            m_bLastBufferRendered = TRUE;
+        }
+
+        if (!g_DoNotCreateDataFiles)
+        {
+            // Read from buffer and write to a file.
+            ReadBytes(ByteDisplacement);
+        }
+    }
+    
+    // Increment the DMA position by the number of bytes displaced since the last
+    // call to UpdatePosition() and ensure we properly wrap at buffer length.
+    //
+    m_ullPlayPosition = m_ullWritePosition =
+        (m_ullWritePosition + ByteDisplacement) % m_ulDmaBufferSize;
+    
+    // m_ullDmaTimeStamp is updated in both GetPostion and GetLinearPosition calls
+    // so m_ullLinearPosition needs to be updated accordingly here
+    //
+    m_ullLinearPosition += ByteDisplacement;
+    
+    // Update the DMA time stamp for the next call to GetPosition()
+    //
+    m_ullDmaTimeStamp = hnsCurrentTime;
+}
+
+//=============================================================================
+#pragma code_seg()
+VOID CMiniportWaveRTStream::WriteBytes
+(
+    _In_ ULONG ByteDisplacement
+)
+/*++
+
+Routine Description:
+
+This function writes the audio buffer using a sine wave generator
+
+Arguments:
+
+ByteDisplacement - # of bytes to process.
+
+--*/
+{
+    ULONG bufferOffset = m_ullLinearPosition % m_ulDmaBufferSize;
+
+    // Normally this will loop no more than once for a single wrap, but if
+    // many bytes have been displaced then this may loops many times.
+    while (ByteDisplacement > 0)
+    {
+        ULONG runWrite = min(ByteDisplacement, m_ulDmaBufferSize - bufferOffset);
+        
+        m_ToneGenerator.GenerateSine(m_pDmaBuffer + bufferOffset, runWrite);
+           	
+        bufferOffset = (bufferOffset + runWrite) % m_ulDmaBufferSize;
+        ByteDisplacement -= runWrite;
+    }
+}
+
+//=============================================================================
+#pragma code_seg()
+VOID CMiniportWaveRTStream::ReadBytes
+(
+    _In_ ULONG ByteDisplacement
+)
+/*++
+
+Routine Description:
+
+This function reads the audio buffer and saves the data in a file.
+
+Arguments:
+
+ByteDisplacement - # of bytes to process.
+
+--*/
+{
+    ULONG bufferOffset = m_ullLinearPosition % m_ulDmaBufferSize;
+
+    // Normally this will loop no more than once for a single wrap, but if
+    // many bytes have been displaced then this may loops many times.
+    while (ByteDisplacement > 0)
+    {
+        ULONG runWrite = min(ByteDisplacement, m_ulDmaBufferSize - bufferOffset);
+        m_SaveData.WriteData(m_pDmaBuffer + bufferOffset, runWrite);
+        bufferOffset = (bufferOffset + runWrite) % m_ulDmaBufferSize;
+        ByteDisplacement -= runWrite;
+    }
+}
+
+//=============================================================================
+#pragma code_seg("PAGE")
+STDMETHODIMP_(NTSTATUS) 
+CMiniportWaveRTStream::SetContentId
+(
+    _In_  ULONG                   contentId,
+    _In_  PCDRMRIGHTS             drmRights
+)
+/*++
+
+Routine Description:
+
+  Sets DRM content Id for this stream. Also updates the Mixed content Id.
+
+Arguments:
+
+  contentId - new content id
+
+  drmRights - rights for this stream.
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    DPF_ENTER(("[CMiniportWaveRT::SetContentId]"));
+
+    NTSTATUS    ntStatus;
+    ULONG       ulOldContentId = contentId;
+
+    m_ulContentId = contentId;
+
+    //
+    // Miniport should create a mixed DrmRights.
+    //
+    ntStatus = m_pMiniport->UpdateDrmRights();
+
+    //
+    // Restore the passed-in content Id.
+    //
+    if (!NT_SUCCESS(ntStatus))
+    {
+        m_ulContentId = ulOldContentId;
+    }
+
+    //
+    // Simple Audio Sample writes each stream seperately to disk. If the rights for this
+    // stream indicates that the stream is CopyProtected, stop writing to disk.
+    //
+    m_SaveData.Disable(drmRights->CopyProtect);
+
+    //
+    // From MSDN:
+    //
+    // This sample doesn't forward protected content, but if your driver uses 
+    // lower layer drivers or a different stack to properly work, please see the 
+    // following info from MSDN:
+    //
+    // "Before allowing protected content to flow through a data path, the system
+    // verifies that the data path is secure. To do so, the system authenticates
+    // each module in the data path beginning at the upstream end of the data path
+    // and moving downstream. As each module is authenticated, that module gives
+    // the system information about the next module in the data path so that it
+    // can also be authenticated. To be successfully authenticated, a module's 
+    // binary file must be signed as DRM-compliant.
+    //
+    // Two adjacent modules in the data path can communicate with each other in 
+    // one of several ways. If the upstream module calls the downstream module 
+    // through IoCallDriver, the downstream module is part of a WDM driver. In 
+    // this case, the upstream module calls the DrmForwardContentToDeviceObject
+    // function to provide the system with the device object representing the 
+    // downstream module. (If the two modules communicate through the downstream
+    // module's COM interface or content handlers, the upstream module calls 
+    // DrmForwardContentToInterface or DrmAddContentHandlers instead.)
+    //
+    // DrmForwardContentToDeviceObject performs the same function as 
+    // PcForwardContentToDeviceObject and IDrmPort2::ForwardContentToDeviceObject." 
+    //
+    // Other supported DRM DDIs for down-level module validation are: 
+    // DrmForwardContentToInterfaces and DrmAddContentHandlers.
+    //
+    // For more information, see MSDN's DRM Functions and Interfaces.
+    //
+
+    return ntStatus;
+} // SetContentId
+
+//=============================================================================
+#pragma code_seg()
+void
+TimerNotifyRT
+(
+    _In_      PEX_TIMER    Timer,
+    _In_opt_  PVOID        DeferredContext
+)
+{
+    LARGE_INTEGER qpc;
+    LARGE_INTEGER qpcFrequency;
+    BOOL bufferCompleted = FALSE;
+
+    UNREFERENCED_PARAMETER(Timer);
+
+    _IRQL_limited_to_(DISPATCH_LEVEL);
+
+    CMiniportWaveRTStream* _this = (CMiniportWaveRTStream*)DeferredContext;
+    
+    if (NULL == _this)
+    {
+        return;
+    }
+
+    KIRQL oldIrql;
+    KeAcquireSpinLock(&_this->m_PositionSpinLock, &oldIrql);
+
+    qpc = KeQueryPerformanceCounter(&qpcFrequency);
+
+    // Convert ticks to 100ns units.
+    LONGLONG  hnsCurrentTime = KSCONVERT_PERFORMANCE_TIME(_this->m_ullPerformanceCounterFrequency.QuadPart, qpc);
+
+    // Calculate the time elapsed since the last we ran DPC that matched Notification interval. Note that the division by 10000 
+    // to convert to milliseconds may cause us to lose some of the time, so we will carry the remainder forward.
+
+    ULONG TimeElapsedInMS = (ULONG)(hnsCurrentTime - _this->m_ullLastDPCTimeStamp + _this->m_hnsDPCTimeCarryForward)/10000;
+
+    if (TimeElapsedInMS >= _this->m_ulNotificationIntervalMs)
+    {
+        // Carry forward the time greater than notification interval to adjust time to signal next buffer completion event accordingly.
+        _this->m_hnsDPCTimeCarryForward = hnsCurrentTime - _this->m_ullLastDPCTimeStamp + _this->m_hnsDPCTimeCarryForward - (_this->m_ulNotificationIntervalMs * 10000);
+        // Save the last time DPC ran at notification interval
+        _this->m_ullLastDPCTimeStamp = hnsCurrentTime;
+        bufferCompleted = TRUE;
+    }
+
+    if (!bufferCompleted && !_this->m_bEoSReceived)
+    {
+        goto End;
+    }
+
+    _this->UpdatePosition(qpc);
+
+    if (!_this->m_bEoSReceived)
+    {
+        _this->m_llPacketCounter++;
+    }
+
+    if (_this->m_KsState != KSSTATE_RUN)
+    {
+        goto End;
+    }
+    
+    PADAPTERCOMMON  pAdapterComm = _this->m_pMiniport->GetAdapterCommObj();
+
+    // Simple buffer underrun detection.
+    if (!_this->IsCurrentWaveRTWritePositionUpdated() && !_this->m_bEoSReceived)
+    {
+        //Event type: eMINIPORT_GLITCH_REPORT
+        //Parameter 1: Current linear buffer position 
+        //Parameter 2: Previous WaveRtBufferWritePosition that the driver received 
+        //Parameter 3: Major glitch code: 1:WaveRT buffer is underrun
+        //Parameter 4: Minor code for the glitch cause
+        pAdapterComm->WriteEtwEvent(eMINIPORT_GLITCH_REPORT, 
+                                    _this->m_ullLinearPosition,
+                                    _this->GetCurrentWaveRTWritePosition(),
+                                    1,      // WaveRT buffer is underrun
+                                    0); 
+    }
+
+    // Send buffer completion event if either of the following is true
+    // 1. Driver consumed a complete buffer for this stream
+    // 2. Driver consumed a partial buffer containing EoS for this stream
+
+    if (!IsListEmpty(&_this->m_NotificationList) && 
+        (bufferCompleted || _this->m_bLastBufferRendered))
+    {
+        PLIST_ENTRY leCurrent = _this->m_NotificationList.Flink;
+        while (leCurrent != &_this->m_NotificationList)
+        {
+            NotificationListEntry* nleCurrent = CONTAINING_RECORD( leCurrent, NotificationListEntry, ListEntry);
+            KeSetEvent(nleCurrent->NotificationEvent, 0, 0);
+
+            leCurrent = leCurrent->Flink;
+        }
+    }
+
+    if (_this->m_bLastBufferRendered)
+    {
+        ExCancelTimer(_this->m_pNotificationTimer, NULL);
+    }
+
+End:
+    KeReleaseSpinLock(&_this->m_PositionSpinLock, oldIrql);
+    return;
+}
+//=============================================================================
+
diff --git a/audio/simpleaudiosample/Source/Main/minwavertstream.h b/audio/simpleaudiosample/Source/Main/minwavertstream.h
new file mode 100644
index 00000000..5545e0d8
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Main/minwavertstream.h
@@ -0,0 +1,248 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    minwavertstream.h
+
+Abstract:
+
+    Definition of wavert miniport class.
+--*/
+
+#ifndef _SIMPLEAUDIOSAMPLE_MINWAVERTSTREAM_H_
+#define _SIMPLEAUDIOSAMPLE_MINWAVERTSTREAM_H_
+
+#include "savedata.h"
+#include "ToneGenerator.h"
+
+//
+// Structure to store notifications events in a protected list
+//
+typedef struct _NotificationListEntry
+{
+    LIST_ENTRY  ListEntry;
+    PKEVENT     NotificationEvent;
+} NotificationListEntry;
+
+EXT_CALLBACK   TimerNotifyRT;
+
+//=============================================================================
+// Referenced Forward
+//=============================================================================
+class CMiniportWaveRT;
+typedef CMiniportWaveRT *PCMiniportWaveRT;
+
+//=============================================================================
+// Classes
+//=============================================================================
+///////////////////////////////////////////////////////////////////////////////
+// CMiniportWaveRTStream 
+// 
+class CMiniportWaveRTStream : 
+    public IDrmAudioStream,
+    public IMiniportWaveRTStreamNotification,
+    public IMiniportWaveRTInputStream,
+    public IMiniportWaveRTOutputStream,
+    public CUnknown
+{
+protected:
+    PPORTWAVERTSTREAM           m_pPortStream;
+    LIST_ENTRY                  m_NotificationList;
+    PEX_TIMER                   m_pNotificationTimer;
+    ULONG                       m_ulNotificationIntervalMs;
+    ULONG                       m_ulCurrentWritePosition;
+    LONG                        m_IsCurrentWritePositionUpdated;
+    
+public:
+    DECLARE_STD_UNKNOWN();
+    DEFINE_STD_CONSTRUCTOR(CMiniportWaveRTStream);
+    ~CMiniportWaveRTStream();
+
+    IMP_IMiniportWaveRTStream;
+    IMP_IMiniportWaveRTStreamNotification;
+    IMP_IMiniportWaveRTInputStream;
+    IMP_IMiniportWaveRTOutputStream;
+    IMP_IMiniportWaveRT;
+    IMP_IDrmAudioStream;
+
+    NTSTATUS                    Init
+    ( 
+        _In_  PCMiniportWaveRT    Miniport,
+        _In_  PPORTWAVERTSTREAM   Stream,
+        _In_  ULONG               Channel,
+        _In_  BOOLEAN             Capture,
+        _In_  PKSDATAFORMAT       DataFormat,
+        _In_  GUID                SignalProcessingMode
+    );
+
+    // Friends
+    friend class                CMiniportWaveRT;
+    friend EXT_CALLBACK         TimerNotifyRT;
+protected:
+    CMiniportWaveRT*            m_pMiniport;
+    ULONG                       m_ulPin;
+    BOOLEAN                     m_bCapture;
+    BOOLEAN                     m_bUnregisterStream;
+    ULONG                       m_ulDmaBufferSize;
+    BYTE*                       m_pDmaBuffer;
+    ULONG                       m_ulNotificationsPerBuffer;
+    KSSTATE                     m_KsState;
+    PKTIMER                     m_pTimer;
+    PRKDPC                      m_pDpc;
+    ULONGLONG                   m_ullPlayPosition;
+    ULONGLONG                   m_ullWritePosition;
+    ULONGLONG                   m_ullLinearPosition;
+    ULONGLONG                   m_ullPresentationPosition;
+    ULONG                       m_ulLastOsReadPacket;
+    ULONG                       m_ulLastOsWritePacket;
+    LONGLONG                    m_llPacketCounter;
+    ULONGLONG                   m_ullDmaTimeStamp;
+    LARGE_INTEGER               m_ullPerformanceCounterFrequency;
+    ULONGLONG                   m_hnsElapsedTimeCarryForward;
+    ULONGLONG                   m_ullLastDPCTimeStamp;
+    ULONGLONG                   m_hnsDPCTimeCarryForward;
+    ULONG                       m_byteDisplacementCarryForward;
+    ULONG                       m_ulDmaMovementRate;
+    BOOL                        m_bLfxEnabled;
+    PBOOL                       m_pbMuted;
+    PLONG                       m_plVolumeLevel;
+    PLONG                       m_plPeakMeter;
+    PWAVEFORMATEXTENSIBLE       m_pWfExt;
+    ULONG                       m_ulContentId;
+    CSaveData                   m_SaveData;
+    ToneGenerator               m_ToneGenerator;
+    GUID                        m_SignalProcessingMode;
+    BOOLEAN                     m_bEoSReceived;
+    BOOLEAN                     m_bLastBufferRendered;
+    KSPIN_LOCK                  m_PositionSpinLock;
+    // Member variable as config params for tone generator
+    ULONG                       m_ulHostCaptureToneFrequency;
+    // If abs(m_dwHostCaptureToneAmplitude) + abs(m_dwHostCaptureToneDCValue) > 100
+    // m_dwHostCaptureToneDCValue will be compensated to make the sum equal to 100
+    DWORD                       m_dwHostCaptureToneAmplitude;   // must be between -100 to 100
+    DWORD                       m_dwLoopbackCaptureToneAmplitude; // must be between -100 to 100
+    DWORD                       m_dwHostCaptureToneDCOffset;   // must be between -100 to 100
+    DWORD                       m_dwLoopbackCaptureToneDCOffset; // must be between -100 to 100
+    DWORD                       m_dwHostCaptureToneInitialPhase;   // must be between -31416 to 31416
+    DWORD                       m_dwLoopbackCaptureToneInitialPhase; // must be between -31416 to 31416
+    // Member variable as config params for tone generator
+
+public:
+
+    NTSTATUS GetVolumeChannelCount
+    (
+        _Out_ UINT32* puiChannelCount
+    );
+
+    NTSTATUS GetVolumeSteppings
+    (
+        _Out_writes_bytes_(_ui32DataSize) PKSPROPERTY_STEPPING_LONG _pKsPropStepLong,
+        _In_  UINT32 _ui32DataSize
+    );
+
+    NTSTATUS GetChannelVolume
+    (
+        _In_  UINT32 _uiChannel,
+        _Out_  LONG* _pVolume
+    );
+
+    NTSTATUS SetChannelVolume
+    (
+        _In_  UINT32 _uiChannel,
+        _In_  LONG _Volume
+    );
+
+    NTSTATUS GetMuteChannelCount
+    (
+        _Out_ UINT32* puiChannelCount
+    );
+
+    NTSTATUS GetMuteSteppings
+    (
+        _Out_writes_bytes_(_ui32DataSize)  PKSPROPERTY_STEPPING_LONG _pKsPropStepLong,
+        _In_  UINT32 _ui32DataSize
+    );
+
+    NTSTATUS GetChannelMute
+    (
+        _In_  UINT32 _uiChannel,
+        _Out_  BOOL* _pbMute
+    );
+
+    NTSTATUS SetChannelMute
+    (
+        _In_  UINT32 _uiChannel,
+        _In_  BOOL _bMute
+    );
+
+    //presentation
+    NTSTATUS GetPresentationPosition
+    (
+        _Out_  KSAUDIO_PRESENTATION_POSITION *_pPresentationPosition
+    );
+
+    NTSTATUS SetCurrentWritePosition
+    (
+        _In_  ULONG ulCurrentWritePosition
+    );
+
+        
+    ULONG GetCurrentWaveRTWritePosition() 
+    {
+        return m_ulCurrentWritePosition;
+    };
+
+    // To support simple underrun validation.
+    BOOL IsCurrentWaveRTWritePositionUpdated() 
+    {
+        return InterlockedExchange(&m_IsCurrentWritePositionUpdated, 0) ? TRUE : FALSE;
+    };
+
+    GUID GetSignalProcessingMode()
+    {
+        return m_SignalProcessingMode;
+    }
+    
+private:
+
+    //
+    // Helper functions.
+    //
+    
+#pragma code_seg()
+
+    VOID WriteBytes
+    (
+        _In_ ULONG ByteDisplacement
+    );
+        
+    VOID ReadBytes
+    (
+        _In_ ULONG ByteDisplacement
+    );
+    
+    VOID UpdatePosition
+    (
+        _In_ LARGE_INTEGER ilQPC
+    );
+    
+    NTSTATUS SetCurrentWritePositionInternal
+    (
+        _In_  ULONG ulCurrentWritePosition
+    );
+    
+    NTSTATUS GetPositions
+    (
+        _Out_opt_  ULONGLONG *      _pullLinearBufferPosition, 
+        _Out_opt_  ULONGLONG *      _pullPresentationPosition, 
+        _Out_opt_  LARGE_INTEGER *  _pliQPCTime
+    );
+
+    NTSTATUS ReadRegistrySettings();
+    
+};
+typedef CMiniportWaveRTStream *PCMiniportWaveRTStream;
+#endif // _SIMPLEAUDIOSAMPLE_MINWAVERTSTREAM_H_
+
diff --git a/audio/simpleaudiosample/Source/Utilities/ToneGenerator.cpp b/audio/simpleaudiosample/Source/Utilities/ToneGenerator.cpp
new file mode 100644
index 00000000..f50e81e1
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Utilities/ToneGenerator.cpp
@@ -0,0 +1,285 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    ToneGenerator
+
+Abstract:
+
+    Implementation of Simple Audio Sample sine wave generator
+
+--*/
+#include "definitions.h"
+#include "ToneGenerator.h"
+
+const double TWO_PI = M_PI * 2;
+
+extern DWORD g_DisableToneGenerator;
+
+//
+// Double to long conversion.
+//
+long ConvertToLong(double Value)
+{
+    return (long)(Value * _I32_MAX);
+};
+
+//
+// Double to short conversion.
+//
+short ConvertToShort(double Value)
+{
+    return (short)(Value * _I16_MAX);
+};
+
+//
+// Double to char conversion.
+//
+unsigned char ConvertToUChar(double Value)
+{
+    const double F_127_5 = 127.5;
+    return (unsigned char)(Value * F_127_5 + F_127_5);
+};
+
+//
+// Ctor: basic init.
+//
+ToneGenerator::ToneGenerator()
+: m_Frequency(0),
+  m_ChannelCount(0),
+  m_BitsPerSample(0),
+  m_SamplesPerSecond(0),
+  m_Mute(false),
+  m_PartialFrame(NULL),
+  m_PartialFrameBytes(0),
+  m_FrameSize(0)
+{
+    // Theta (double) and SampleIncrement (double) are init in the Init() method 
+    // after saving the floating point state. 
+}
+
+//
+// Dtor: free resources.
+//
+ToneGenerator::~ToneGenerator()
+{
+    if (m_PartialFrame)
+    {
+        ExFreePoolWithTag(m_PartialFrame, SIMPLEAUDIOSAMPLE_POOLTAG);
+        m_PartialFrame = NULL;
+        m_PartialFrameBytes = 0;
+    }
+}
+
+// 
+// Init a new frame. 
+// Note: caller will save and restore the floatingpoint state.
+//
+#pragma warning(push)
+// Caller wraps this routine between KeSaveFloatingPointState/KeRestoreFloatingPointState calls.
+#pragma warning(disable: 28110)
+
+VOID ToneGenerator::InitNewFrame
+(
+    _Out_writes_bytes_(FrameSize)    BYTE*  Frame, 
+    _In_                             DWORD  FrameSize
+)
+{
+    double sinValue = m_ToneDCOffset + m_ToneAmplitude * sin( m_Theta );
+
+    if (FrameSize != (DWORD)m_ChannelCount * m_BitsPerSample/8)
+    {
+        ASSERT(FALSE);
+        RtlZeroMemory(Frame, FrameSize);
+        return;
+    }
+    
+    for(ULONG i = 0; i < m_ChannelCount; ++i)
+    {
+        if (m_BitsPerSample == 8)
+        {
+            unsigned char *dataBuffer = reinterpret_cast<unsigned char *>(Frame);
+             dataBuffer[i] = ConvertToUChar(sinValue);
+        }
+        else if (m_BitsPerSample == 16)
+        {
+            short *dataBuffer = reinterpret_cast<short *>(Frame);
+            dataBuffer[i] = ConvertToShort(sinValue);
+        }
+        else if (m_BitsPerSample == 24)
+        {
+            BYTE *dataBuffer = Frame;
+            long val = ConvertToLong(sinValue);
+            val = val >> 8;
+            RtlCopyMemory(dataBuffer, &val, 3);
+        }
+        else if (m_BitsPerSample == 32)
+        {
+            long *dataBuffer = reinterpret_cast<long *>(Frame);
+            dataBuffer[i] = ConvertToLong(sinValue);
+        }
+    }
+
+    m_Theta += m_SampleIncrement;
+    if (m_Theta >= TWO_PI)
+    {
+        m_Theta -= TWO_PI;
+    }
+}
+#pragma warning(pop)
+
+//
+// GenerateSamples()
+//
+//  Generate a sine wave that fits into the specified buffer.
+//
+//  Buffer - Buffer to hold the samples
+//  BufferLength - Length of the buffer.
+//
+//
+void ToneGenerator::GenerateSine
+(
+    _Out_writes_bytes_(BufferLength) BYTE       *Buffer, 
+    _In_                             size_t      BufferLength
+)
+{
+    NTSTATUS        status;
+    KFLOATING_SAVE  saveData;
+    BYTE *          buffer;
+    size_t          length;
+    size_t          copyBytes;
+
+    // if muted, or tone generator disabled via registry,
+    // we deliver silence.
+    if (m_Mute || g_DisableToneGenerator)
+    {
+        goto ZeroBuffer;
+    }
+    
+    status = KeSaveFloatingPointState(&saveData);
+    if (!NT_SUCCESS(status))
+    {
+        goto ZeroBuffer;
+    }
+
+    buffer = Buffer;
+    length = BufferLength;
+
+    //
+    // Check if we have any residual frame bytes from the last time.
+    //
+    if (m_PartialFrameBytes)
+    {
+        ASSERT(m_FrameSize > m_PartialFrameBytes);
+        DWORD offset = m_FrameSize - m_PartialFrameBytes;
+        copyBytes = MIN(m_PartialFrameBytes, length);
+        RtlCopyMemory(buffer, m_PartialFrame + offset, copyBytes);
+        RtlZeroMemory(m_PartialFrame + offset, copyBytes);
+        length -= copyBytes;
+        buffer += copyBytes;
+        m_PartialFrameBytes = 0;
+    }
+    
+    IF_TRUE_JUMP(length == 0, Done);
+
+    //
+    // Copy all the aligned frames.
+    // 
+
+    size_t frames = length/m_FrameSize;
+
+    for (size_t i = 0; i < frames; ++i)
+    {
+        InitNewFrame(buffer, m_FrameSize);
+        buffer += m_FrameSize;
+        length -= m_FrameSize;
+    }
+
+    IF_TRUE_JUMP(length == 0, Done);
+    
+    //
+    // Copy any partial frame at the end.
+    //
+    ASSERT(m_FrameSize > length);
+    InitNewFrame(m_PartialFrame, m_FrameSize);
+    RtlCopyMemory(buffer, m_PartialFrame, length);
+    RtlZeroMemory(m_PartialFrame, length);
+    m_PartialFrameBytes = m_FrameSize - (DWORD)length;    
+    
+Done:
+    KeRestoreFloatingPointState(&saveData);
+    return;
+
+ZeroBuffer:
+    RtlZeroMemory(Buffer, BufferLength);
+    return;
+}
+
+NTSTATUS ToneGenerator::Init
+(
+    _In_    DWORD                   ToneFrequency, 
+    _In_    double                  ToneAmplitude,
+    _In_    double                  ToneDCOffset,
+    _In_    double                  ToneInitialPhase,
+    _In_    PWAVEFORMATEXTENSIBLE   WfExt
+)
+{
+    NTSTATUS        status      = STATUS_SUCCESS;
+    KFLOATING_SAVE  saveData;
+    
+    //
+    // This sample supports PCM formats only. 
+    //
+    if ((WfExt->Format.wFormatTag != WAVE_FORMAT_PCM &&
+        !(WfExt->Format.wFormatTag == WAVE_FORMAT_EXTENSIBLE &&
+          IsEqualGUIDAligned(WfExt->SubFormat, KSDATAFORMAT_SUBTYPE_PCM))))
+    {
+        status = STATUS_NOT_SUPPORTED;
+    }
+    IF_FAILED_JUMP(status, Done);
+
+    //
+    // Save floating state (just in case).
+    //
+    status = KeSaveFloatingPointState(&saveData);
+    IF_FAILED_JUMP(status, Done);
+
+    //
+    // Basic init.
+    //
+    m_Theta             = ToneInitialPhase;
+    m_Frequency         = ToneFrequency;
+    m_ToneAmplitude     = ToneAmplitude;
+    m_ToneDCOffset      = ToneDCOffset;
+
+    m_ChannelCount      = WfExt->Format.nChannels;      // # channels.
+    m_BitsPerSample     = WfExt->Format.wBitsPerSample; // bits per sample.
+    m_SamplesPerSecond  = WfExt->Format.nSamplesPerSec; // samples per sec.
+    m_Mute              = false;
+    m_SampleIncrement   = (m_Frequency * TWO_PI) / (double)m_SamplesPerSecond;
+    m_FrameSize         = (DWORD)m_ChannelCount * m_BitsPerSample/8;
+    ASSERT(m_FrameSize == WfExt->Format.nBlockAlign);
+    
+    //
+    // Restore floating state.
+    //
+    KeRestoreFloatingPointState(&saveData);
+
+    // 
+    // Allocate a buffer to hold a partial frame.
+    //
+    m_PartialFrame = (BYTE*)ExAllocatePool2(
+                                    POOL_FLAG_NON_PAGED,
+                                    m_FrameSize,
+                                    SIMPLEAUDIOSAMPLE_POOLTAG);
+
+    IF_TRUE_ACTION_JUMP(m_PartialFrame == NULL, status = STATUS_INSUFFICIENT_RESOURCES, Done);
+    
+    status = STATUS_SUCCESS;
+
+Done:
+    return status;
+}
+
diff --git a/audio/simpleaudiosample/Source/Utilities/ToneGenerator.h b/audio/simpleaudiosample/Source/Utilities/ToneGenerator.h
new file mode 100644
index 00000000..85b1229a
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Utilities/ToneGenerator.h
@@ -0,0 +1,74 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    ToneGenerator.h
+
+Abstract:
+
+    Declaration of Simple Audio Sample sine wave generator.
+--*/
+#ifndef _SIMPLEAUDIOSAMPLE_TONEGENERATOR_H
+#define _SIMPLEAUDIOSAMPLE_TONEGENERATOR_H
+
+#define _USE_MATH_DEFINES
+#include <math.h>
+#include <limits.h>
+
+class ToneGenerator
+{
+public:
+    DWORD           m_Frequency; 
+    WORD            m_ChannelCount; 
+    WORD            m_BitsPerSample;
+    DWORD           m_SamplesPerSecond;
+    double          m_Theta;
+    double          m_SampleIncrement;  
+    bool            m_Mute;
+    BYTE*           m_PartialFrame;
+    DWORD           m_PartialFrameBytes;
+    DWORD           m_FrameSize;
+    double          m_ToneAmplitude;
+    double          m_ToneDCOffset;
+
+public:
+    ToneGenerator();
+    ~ToneGenerator();
+    
+    NTSTATUS
+    Init
+    (
+        _In_    DWORD                   ToneFrequency, 
+        _In_    double                  ToneAmplitude,
+        _In_    double                  ToneDCOffset,
+        _In_    double                  ToneInitialPhase,
+        _In_    PWAVEFORMATEXTENSIBLE   WfExt
+    );
+    
+    VOID 
+    GenerateSine
+    (
+        _Out_writes_bytes_(BufferLength) BYTE       *Buffer, 
+        _In_                             size_t      BufferLength
+    );
+
+    VOID
+    SetMute
+    (
+        _In_ bool Value
+    )
+    {
+        m_Mute = Value;
+    }
+
+private:
+    VOID InitNewFrame
+    (
+        _Out_writes_bytes_(FrameSize)   BYTE*  Frame, 
+        _In_                            DWORD  FrameSize
+    );
+};
+
+#endif // _SIMPLEAUDIOSAMPLE_TONEGENERATOR_H
diff --git a/audio/simpleaudiosample/Source/Utilities/Utilities.vcxproj b/audio/simpleaudiosample/Source/Utilities/Utilities.vcxproj
new file mode 100644
index 00000000..9af7c493
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Utilities/Utilities.vcxproj
@@ -0,0 +1,266 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|ARM64">
+      <Configuration>Debug</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|ARM64">
+      <Configuration>Release</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{33E61864-6F2C-4F9F-BE70-8F8985A4F283}</ProjectGuid>
+    <RootNamespace>$(MSBuildProjectName)</RootNamespace>
+    <KMDF_VERSION_MAJOR>1</KMDF_VERSION_MAJOR>
+    <Configuration Condition="'$(Configuration)' == ''">Debug</Configuration>
+    <Platform Condition="'$(Platform)' == ''">Win32</Platform>
+    <SampleGuid>{F51739CE-5253-42B5-9191-57F28B5842C6}</SampleGuid>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Label="Configuration" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>False</UseDebugLibraries>
+    <DriverTargetPlatform>Universal</DriverTargetPlatform>
+    <DriverType>KMDF</DriverType>
+    <PlatformToolset>WindowsKernelModeDriver10.0</PlatformToolset>
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'" Label="Configuration">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>False</UseDebugLibraries>
+    <DriverTargetPlatform>Universal</DriverTargetPlatform>
+    <DriverType>KMDF</DriverType>
+    <PlatformToolset>WindowsKernelModeDriver10.0</PlatformToolset>
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+  </PropertyGroup>
+  <PropertyGroup Label="Configuration" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>True</UseDebugLibraries>
+    <DriverTargetPlatform>Universal</DriverTargetPlatform>
+    <DriverType>KMDF</DriverType>
+    <PlatformToolset>WindowsKernelModeDriver10.0</PlatformToolset>
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'" Label="Configuration">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>True</UseDebugLibraries>
+    <DriverTargetPlatform>Universal</DriverTargetPlatform>
+    <DriverType>KMDF</DriverType>
+    <PlatformToolset>WindowsKernelModeDriver10.0</PlatformToolset>
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+  </PropertyGroup>
+  <PropertyGroup Label="Configuration" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>False</UseDebugLibraries>
+    <DriverTargetPlatform>Universal</DriverTargetPlatform>
+    <DriverType>KMDF</DriverType>
+    <PlatformToolset>WindowsKernelModeDriver10.0</PlatformToolset>
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+  </PropertyGroup>
+  <PropertyGroup Label="Configuration" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <TargetVersion>Windows10</TargetVersion>
+    <UseDebugLibraries>True</UseDebugLibraries>
+    <DriverTargetPlatform>Universal</DriverTargetPlatform>
+    <DriverType>KMDF</DriverType>
+    <PlatformToolset>WindowsKernelModeDriver10.0</PlatformToolset>
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <PropertyGroup>
+    <OutDir>$(IntDir)</OutDir>
+  </PropertyGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" />
+  </ImportGroup>
+  <ItemGroup Label="WrappedTaskItems" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <TargetName>Utilities</TargetName>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'">
+    <TargetName>Utilities</TargetName>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <TargetName>Utilities</TargetName>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">
+    <TargetName>Utilities</TargetName>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <TargetName>Utilities</TargetName>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <TargetName>Utilities</TargetName>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </ResourceCompile>
+    <ClCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..;.</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc;.</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_NEW_DELETE_OPERATORS_</PreprocessorDefinitions>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <DisableSpecificWarnings>4595;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+    </ClCompile>
+    <Midl>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </Midl>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'">
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </ResourceCompile>
+    <ClCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..;.</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc;.</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_NEW_DELETE_OPERATORS_</PreprocessorDefinitions>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <DisableSpecificWarnings>4595;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+    </ClCompile>
+    <Midl>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </Midl>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </ResourceCompile>
+    <ClCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..;.</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc;.</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_NEW_DELETE_OPERATORS_</PreprocessorDefinitions>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <DisableSpecificWarnings>4595;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+    </ClCompile>
+    <Midl>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </Midl>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </ResourceCompile>
+    <ClCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..;.</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc;.</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_NEW_DELETE_OPERATORS_</PreprocessorDefinitions>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <DisableSpecificWarnings>4595;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+    </ClCompile>
+    <Midl>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </Midl>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </ResourceCompile>
+    <ClCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..;.</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc;.</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_NEW_DELETE_OPERATORS_</PreprocessorDefinitions>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <DisableSpecificWarnings>4595;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+    </ClCompile>
+    <Midl>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </Midl>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </ResourceCompile>
+    <ClCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..;.</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc;.</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_;_NEW_DELETE_OPERATORS_</PreprocessorDefinitions>
+      <ExceptionHandling>
+      </ExceptionHandling>
+      <DisableSpecificWarnings>4595;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+    </ClCompile>
+    <Midl>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(DDK_INC_PATH);..</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);..\Inc</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>%(PreprocessorDefinitions);_USE_WAVERT_</PreprocessorDefinitions>
+    </Midl>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="hw.cpp" />
+    <ClCompile Include="kshelper.cpp" />
+    <ClCompile Include="savedata.cpp" />
+    <ClCompile Include="tonegenerator.cpp" />
+  </ItemGroup>
+  <ItemGroup>
+    <Inf Exclude="@(Inf)" Include="*.inf" />
+    <FilesToPackage Include="$(TargetPath)" Condition="'$(ConfigurationType)'=='Driver' or '$(ConfigurationType)'=='DynamicLibrary'" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Exclude="@(None)" Include="*.txt;*.htm;*.html" />
+    <None Exclude="@(None)" Include="*.ico;*.cur;*.bmp;*.dlg;*.rct;*.gif;*.jpg;*.jpeg;*.wav;*.jpe;*.tiff;*.tif;*.png;*.rc2" />
+    <None Exclude="@(None)" Include="*.def;*.bat;*.hpj;*.asmx" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Exclude="@(ClInclude)" Include="*.h;*.hpp;*.hxx;*.hm;*.inl;*.xsd" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+</Project>
diff --git a/audio/simpleaudiosample/Source/Utilities/Utilities.vcxproj.Filters b/audio/simpleaudiosample/Source/Utilities/Utilities.vcxproj.Filters
new file mode 100644
index 00000000..7a4ebde2
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Utilities/Utilities.vcxproj.Filters
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Source Files">
+      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx;*</Extensions>
+      <UniqueIdentifier>{CDBBEDA3-98E9-4C7A-BDB1-25EC47D0B087}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="Header Files">
+      <Extensions>h;hpp;hxx;hm;inl;inc;xsd</Extensions>
+      <UniqueIdentifier>{FA3DF57E-BA19-4783-831B-CF9D4D594F70}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="Resource Files">
+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms;man;xml</Extensions>
+      <UniqueIdentifier>{CB830E4F-01DA-4D35-9789-E7DB0D02A79C}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="Driver Files">
+      <Extensions>inf;inv;inx;mof;mc;</Extensions>
+      <UniqueIdentifier>{49F92783-3B39-4D0C-A153-8C346F754749}</UniqueIdentifier>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="*.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="*.h;*.hpp;*.hxx;*.hm;*.inl;*.xsd">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+  </ItemGroup>
+</Project>
diff --git a/audio/simpleaudiosample/Source/Utilities/hw.cpp b/audio/simpleaudiosample/Source/Utilities/hw.cpp
new file mode 100644
index 00000000..133bcc99
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Utilities/hw.cpp
@@ -0,0 +1,446 @@
+/*++
+
+Copyright (c)  Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    hw.cpp
+
+Abstract:
+
+    Implementation of Simple Audio Sample HW class. 
+    Simple Audio Sample HW has an array for storing mixer and volume settings
+    for the topology.
+--*/
+#include "definitions.h"
+#include "hw.h"
+
+//=============================================================================
+// CSimpleAudioSampleHW
+//=============================================================================
+
+//=============================================================================
+#pragma code_seg("PAGE")
+CSimpleAudioSampleHW::CSimpleAudioSampleHW()
+: m_ulMux(0),
+    m_bDevSpecific(FALSE),
+    m_iDevSpecific(0),
+    m_uiDevSpecific(0)
+/*++
+
+Routine Description:
+
+    Constructor for SimpleAudioSampleHW. 
+
+Arguments:
+
+Return Value:
+
+    void
+
+--*/
+{
+    PAGED_CODE();
+    
+    MixerReset();
+} // SimpleAudioSampleHW
+#pragma code_seg()
+
+
+//=============================================================================
+BOOL
+CSimpleAudioSampleHW::bGetDevSpecific()
+/*++
+
+Routine Description:
+
+  Gets the HW (!) Device Specific info
+
+Arguments:
+
+  N/A
+
+Return Value:
+
+  True or False (in this example).
+
+--*/
+{
+    return m_bDevSpecific;
+} // bGetDevSpecific
+
+//=============================================================================
+void
+CSimpleAudioSampleHW::bSetDevSpecific
+(
+    _In_  BOOL                bDevSpecific
+)
+/*++
+
+Routine Description:
+
+  Sets the HW (!) Device Specific info
+
+Arguments:
+
+  fDevSpecific - true or false for this example.
+
+Return Value:
+
+    void
+
+--*/
+{
+    m_bDevSpecific = bDevSpecific;
+} // bSetDevSpecific
+
+//=============================================================================
+INT
+CSimpleAudioSampleHW::iGetDevSpecific()
+/*++
+
+Routine Description:
+
+  Gets the HW (!) Device Specific info
+
+Arguments:
+
+  N/A
+
+Return Value:
+
+  int (in this example).
+
+--*/
+{
+    return m_iDevSpecific;
+} // iGetDevSpecific
+
+//=============================================================================
+void
+CSimpleAudioSampleHW::iSetDevSpecific
+(
+    _In_  INT                 iDevSpecific
+)
+/*++
+
+Routine Description:
+
+  Sets the HW (!) Device Specific info
+
+Arguments:
+
+  fDevSpecific - true or false for this example.
+
+Return Value:
+
+    void
+
+--*/
+{
+    m_iDevSpecific = iDevSpecific;
+} // iSetDevSpecific
+
+//=============================================================================
+UINT
+CSimpleAudioSampleHW::uiGetDevSpecific()
+/*++
+
+Routine Description:
+
+  Gets the HW (!) Device Specific info
+
+Arguments:
+
+  N/A
+
+Return Value:
+
+  UINT (in this example).
+
+--*/
+{
+    return m_uiDevSpecific;
+} // uiGetDevSpecific
+
+//=============================================================================
+void
+CSimpleAudioSampleHW::uiSetDevSpecific
+(
+    _In_  UINT                uiDevSpecific
+)
+/*++
+
+Routine Description:
+
+  Sets the HW (!) Device Specific info
+
+Arguments:
+
+  uiDevSpecific - int for this example.
+
+Return Value:
+
+    void
+
+--*/
+{
+    m_uiDevSpecific = uiDevSpecific;
+} // uiSetDevSpecific
+
+
+//=============================================================================
+BOOL
+CSimpleAudioSampleHW::GetMixerMute
+(
+    _In_  ULONG                   ulNode,
+    _In_  ULONG                   ulChannel
+)
+/*++
+
+Routine Description:
+
+  Gets the HW (!) mute levels for Simple Audio Sample
+
+Arguments:
+
+  ulNode - topology node id
+  
+  ulChannel - which channel are we reading?
+
+Return Value:
+
+  mute setting
+
+--*/
+{
+    UNREFERENCED_PARAMETER(ulChannel);
+    
+    if (ulNode < MAX_TOPOLOGY_NODES)
+    {
+        return m_MuteControls[ulNode];
+    }
+
+    return 0;
+} // GetMixerMute
+
+//=============================================================================
+ULONG                       
+CSimpleAudioSampleHW::GetMixerMux()
+/*++
+
+Routine Description:
+
+  Return the current mux selection
+
+Arguments:
+
+Return Value:
+
+  ULONG
+
+--*/
+{
+    return m_ulMux;
+} // GetMixerMux
+
+//=============================================================================
+LONG
+CSimpleAudioSampleHW::GetMixerVolume
+(   
+    _In_  ULONG                   ulNode,
+    _In_  ULONG                   ulChannel
+)
+/*++
+
+Routine Description:
+
+  Gets the HW (!) volume for Simple Audio Sample.
+
+Arguments:
+
+  ulNode - topology node id
+
+  ulChannel - which channel are we reading?
+
+Return Value:
+
+  LONG - volume level
+
+--*/
+{
+    UNREFERENCED_PARAMETER(ulChannel);
+
+    if (ulNode < MAX_TOPOLOGY_NODES)
+    {
+        return m_VolumeControls[ulNode];
+    }
+
+    return 0;
+} // GetMixerVolume
+
+//=============================================================================
+LONG
+CSimpleAudioSampleHW::GetMixerPeakMeter
+(   
+    _In_  ULONG                   ulNode,
+    _In_  ULONG                   ulChannel
+)
+/*++
+
+Routine Description:
+
+  Gets the HW (!) peak meter for Simple Audio Sample.
+
+Arguments:
+
+  ulNode - topology node id
+
+  ulChannel - which channel are we reading?
+
+Return Value:
+
+  LONG - sample peak meter level
+
+--*/
+{
+    UNREFERENCED_PARAMETER(ulChannel);
+
+    if (ulNode < MAX_TOPOLOGY_NODES)
+    {
+        return m_PeakMeterControls[ulNode];
+    }
+
+    return 0;
+} // GetMixerVolume
+
+//=============================================================================
+#pragma code_seg("PAGE")
+void 
+CSimpleAudioSampleHW::MixerReset()
+/*++
+
+Routine Description:
+
+  Resets the mixer registers.
+
+Arguments:
+
+Return Value:
+
+    void
+
+--*/
+{
+    PAGED_CODE();
+    
+    RtlFillMemory(m_VolumeControls, sizeof(LONG) * MAX_TOPOLOGY_NODES, 0xFF);
+    // Endpoints are not muted by default.
+    RtlZeroMemory(m_MuteControls, sizeof(BOOL) * MAX_TOPOLOGY_NODES);
+
+    for (ULONG i=0; i<MAX_TOPOLOGY_NODES; ++i)
+    {
+        m_PeakMeterControls[i] = PEAKMETER_SIGNED_MAXIMUM/2;
+    }
+    
+    // BUGBUG change this depending on the topology
+    m_ulMux = 2;
+} // MixerReset
+#pragma code_seg()
+
+//=============================================================================
+void
+CSimpleAudioSampleHW::SetMixerMute
+(
+    _In_  ULONG                   ulNode,
+    _In_  ULONG                   ulChannel,
+    _In_  BOOL                    fMute
+)
+/*++
+
+Routine Description:
+
+  Sets the HW (!) mute levels for Simple Audio Sample
+
+Arguments:
+
+  ulNode - topology node id
+
+  ulChannel - which channel are we setting?
+  
+  fMute - mute flag
+
+Return Value:
+
+    void
+
+--*/
+{
+    UNREFERENCED_PARAMETER(ulChannel);
+
+    if (ulNode < MAX_TOPOLOGY_NODES)
+    {
+        m_MuteControls[ulNode] = fMute;
+    }
+} // SetMixerMute
+
+//=============================================================================
+void                        
+CSimpleAudioSampleHW::SetMixerMux
+(
+    _In_  ULONG                   ulNode
+)
+/*++
+
+Routine Description:
+
+  Sets the HW (!) mux selection
+
+Arguments:
+
+  ulNode - topology node id
+
+Return Value:
+
+    void
+
+--*/
+{
+    m_ulMux = ulNode;
+} // SetMixMux
+
+//=============================================================================
+void  
+CSimpleAudioSampleHW::SetMixerVolume
+(   
+    _In_  ULONG                   ulNode,
+    _In_  ULONG                   ulChannel,
+    _In_  LONG                    lVolume
+)
+/*++
+
+Routine Description:
+
+  Sets the HW (!) volume for Simple Audio Sample.
+
+Arguments:
+
+  ulNode - topology node id
+
+  ulChannel - which channel are we setting?
+
+  lVolume - volume level
+
+Return Value:
+
+    void
+
+--*/
+{
+    UNREFERENCED_PARAMETER(ulChannel);
+
+    if (ulNode < MAX_TOPOLOGY_NODES)
+    {
+        m_VolumeControls[ulNode] = lVolume;
+    }
+} // SetMixerVolume
diff --git a/audio/simpleaudiosample/Source/Utilities/hw.h b/audio/simpleaudiosample/Source/Utilities/hw.h
new file mode 100644
index 00000000..3360c24a
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Utilities/hw.h
@@ -0,0 +1,105 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    hw.h
+
+Abstract:
+
+    Declaration of Simple Audio Sample HW class. 
+    Simple Audio Sample HW has an array for storing mixer and volume settings
+    for the topology.
+--*/
+
+#ifndef _SIMPLEAUDIOSAMPLE_HW_H_
+#define _SIMPLEAUDIOSAMPLE_HW_H_
+
+//=============================================================================
+// Defines
+//=============================================================================
+// BUGBUG we should dynamically allocate this...
+#define MAX_TOPOLOGY_NODES      20
+
+//=============================================================================
+// Classes
+//=============================================================================
+///////////////////////////////////////////////////////////////////////////////
+// CSimpleAudioSampleHW
+// This class represents virtual Simple Audio Sample HW. An array representing volume
+// registers and mute registers.
+
+class CSimpleAudioSampleHW
+{
+public:
+protected:
+    BOOL                        m_MuteControls[MAX_TOPOLOGY_NODES];
+    LONG                        m_VolumeControls[MAX_TOPOLOGY_NODES];
+    LONG                        m_PeakMeterControls[MAX_TOPOLOGY_NODES];
+    ULONG                       m_ulMux;            // Mux selection
+    BOOL                        m_bDevSpecific;
+    INT                         m_iDevSpecific;
+    UINT                        m_uiDevSpecific;
+
+private:
+
+public:
+    CSimpleAudioSampleHW();
+    
+    void                        MixerReset();
+    BOOL                        bGetDevSpecific();
+    void                        bSetDevSpecific
+    (
+        _In_  BOOL                bDevSpecific
+    );
+    INT                         iGetDevSpecific();
+    void                        iSetDevSpecific
+    (
+        _In_  INT                 iDevSpecific
+    );
+    UINT                        uiGetDevSpecific();
+    void                        uiSetDevSpecific
+    (
+        _In_  UINT                uiDevSpecific
+    );
+    BOOL                        GetMixerMute
+    (
+        _In_  ULONG               ulNode,
+        _In_  ULONG               ulChannel
+    );
+    void                        SetMixerMute
+    (
+        _In_  ULONG               ulNode,
+        _In_  ULONG               ulChannel,
+        _In_  BOOL                fMute
+    );
+    ULONG                       GetMixerMux();
+    void                        SetMixerMux
+    (
+        _In_  ULONG               ulNode
+    );
+    LONG                        GetMixerVolume
+    (   
+        _In_  ULONG               ulNode,
+        _In_  ULONG               ulChannel
+    );
+    void                        SetMixerVolume
+    (   
+        _In_  ULONG               ulNode,
+        _In_  ULONG               ulChannel,
+        _In_  LONG                lVolume
+    );
+    
+    LONG                        GetMixerPeakMeter
+    (   
+        _In_  ULONG               ulNode,
+        _In_  ULONG               ulChannel
+    );
+
+protected:
+private:
+};
+typedef CSimpleAudioSampleHW    *PCSimpleAudioSampleHW;
+
+#endif  // _SIMPLEAUDIOSAMPLE_HW_H_
diff --git a/audio/simpleaudiosample/Source/Utilities/kshelper.cpp b/audio/simpleaudiosample/Source/Utilities/kshelper.cpp
new file mode 100644
index 00000000..e71c6021
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Utilities/kshelper.cpp
@@ -0,0 +1,958 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    kshelper.cpp
+
+Abstract:
+
+    Helper functions for simple audio sample
+--*/
+
+#include "definitions.h"
+
+//4127: conditional expression is constant
+#pragma warning (disable : 4127)
+
+//-----------------------------------------------------------------------------
+#pragma code_seg("PAGE")
+PWAVEFORMATEX                   
+GetWaveFormatEx
+(
+    _In_  PKSDATAFORMAT           pDataFormat
+)
+/*++
+
+Routine Description:
+
+  Returns the waveformatex for known formats. 
+
+Arguments:
+
+  pDataFormat - data format.
+
+Return Value:
+    
+    waveformatex in DataFormat.
+    NULL for unknown data formats.
+
+--*/
+{
+    PAGED_CODE();
+
+    PWAVEFORMATEX           pWfx = NULL;
+    
+    // If this is a known dataformat extract the waveformat info.
+    //
+    if
+    ( 
+        pDataFormat &&
+        ( IsEqualGUIDAligned(pDataFormat->MajorFormat, 
+                KSDATAFORMAT_TYPE_AUDIO)             &&
+          ( IsEqualGUIDAligned(pDataFormat->Specifier, 
+                KSDATAFORMAT_SPECIFIER_WAVEFORMATEX) ||
+            IsEqualGUIDAligned(pDataFormat->Specifier, 
+                KSDATAFORMAT_SPECIFIER_DSOUND) ) )
+    )
+    {
+        pWfx = PWAVEFORMATEX(pDataFormat + 1);
+
+        if (IsEqualGUIDAligned(pDataFormat->Specifier, 
+                KSDATAFORMAT_SPECIFIER_DSOUND))
+        {
+            PKSDSOUND_BUFFERDESC    pwfxds;
+
+            pwfxds = PKSDSOUND_BUFFERDESC(pDataFormat + 1);
+            pWfx = &pwfxds->WaveFormatEx;
+        }
+    }
+
+    return pWfx;
+} // GetWaveFormatEx
+
+//-----------------------------------------------------------------------------
+#pragma code_seg("PAGE")
+NTSTATUS 
+ValidatePropertyParams
+(
+    _In_ PPCPROPERTY_REQUEST      PropertyRequest, 
+    _In_ ULONG                    cbValueSize,
+    _In_ ULONG                    cbInstanceSize /* = 0  */
+)
+/*++
+
+Routine Description:
+
+  Validates property parameters.
+
+Arguments:
+
+  PropertyRequest - 
+  cbValueSize -
+  cbInstanceSize -
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    NTSTATUS ntStatus = STATUS_UNSUCCESSFUL;
+
+    if (PropertyRequest && cbValueSize)
+    {
+        // If the caller is asking for ValueSize.
+        //
+        if (0 == PropertyRequest->ValueSize) 
+        {
+            PropertyRequest->ValueSize = cbValueSize;
+            ntStatus = STATUS_BUFFER_OVERFLOW;
+        }
+        // If the caller passed an invalid ValueSize.
+        //
+        else if (PropertyRequest->ValueSize < cbValueSize)
+        {
+            ntStatus = STATUS_BUFFER_TOO_SMALL;
+        }
+        else if (PropertyRequest->InstanceSize < cbInstanceSize)
+        {
+            ntStatus = STATUS_BUFFER_TOO_SMALL;
+        }
+        // If all parameters are OK.
+        // 
+        else if (PropertyRequest->ValueSize >= cbValueSize)
+        {
+            if (PropertyRequest->Value)
+            {
+                ntStatus = STATUS_SUCCESS;
+                //
+                // Caller should set ValueSize, if the property 
+                // call is successful.
+                //
+            }
+        }
+    }
+    else
+    {
+        ntStatus = STATUS_INVALID_PARAMETER;
+    }
+    
+    // Clear the ValueSize if unsuccessful.
+    //
+    if (PropertyRequest &&
+        STATUS_SUCCESS != ntStatus &&
+        STATUS_BUFFER_OVERFLOW != ntStatus)
+    {
+        PropertyRequest->ValueSize = 0;
+    }
+
+    return ntStatus;
+} // ValidatePropertyParams
+
+//-----------------------------------------------------------------------------
+#pragma code_seg("PAGE")
+NTSTATUS
+SimpleAudioSamplePropertyDispatch
+(
+    _In_ PPCPROPERTY_REQUEST PropertyRequest
+)
+/*++
+    Handles and dispatches a SIMPLEAUDIOSAMPLE_PROPERTY_ITEM.
+
+    Use this as the property handler only if the property item is a
+    SIMPLEAUDIOSAMPLE_PROPERTY_ITEM.
+--*/
+{
+    PAGED_CODE();
+
+    SIMPLEAUDIOSAMPLE_PROPERTY_ITEM* item = (SIMPLEAUDIOSAMPLE_PROPERTY_ITEM*)PropertyRequest->PropertyItem;
+
+    if (PropertyRequest->Verb & KSPROPERTY_TYPE_BASICSUPPORT)
+    {
+        if (item->SupportHandler != nullptr)
+        {
+            return item->SupportHandler(PropertyRequest);
+        }
+        else
+        {
+            return PropertyHandler_BasicSupport(PropertyRequest, PropertyRequest->PropertyItem->Flags, VT_ILLEGAL);
+        }
+    }
+
+    // Verify instance data size
+    if (PropertyRequest->InstanceSize < item->MinProperty)
+    {
+        return STATUS_INVALID_PARAMETER;
+    }
+
+    ULONG cbMinSize = item->MinData;
+
+    // Verify value size
+    if (PropertyRequest->ValueSize == 0)
+    {
+        PropertyRequest->ValueSize = cbMinSize;
+        return STATUS_BUFFER_OVERFLOW;
+    }
+    if (PropertyRequest->ValueSize < cbMinSize)
+    {
+        PropertyRequest->ValueSize = 0;
+        return STATUS_BUFFER_TOO_SMALL;
+    }
+
+    if (PropertyRequest->Verb & KSPROPERTY_TYPE_GET)
+    {
+        if (item->GetHandler != nullptr)
+        {
+            return item->GetHandler(PropertyRequest);
+        }
+        else
+        {
+            return STATUS_NOT_SUPPORTED;
+        }
+    }
+
+    if (PropertyRequest->Verb & KSPROPERTY_TYPE_SET)
+    {
+        if (item->SetHandler != nullptr)
+        {
+            return item->SetHandler(PropertyRequest);
+        }
+        else
+        {
+            return STATUS_NOT_SUPPORTED;
+        }
+    }
+
+    return STATUS_INVALID_DEVICE_REQUEST;
+}
+
+//-----------------------------------------------------------------------------
+#pragma code_seg("PAGE")
+NTSTATUS                        
+PropertyHandler_BasicSupport
+(
+    _In_ PPCPROPERTY_REQUEST         PropertyRequest,
+    _In_ ULONG                       Flags,
+    _In_ DWORD                       PropTypeSetId
+)
+/*++
+
+Routine Description:
+
+  Default basic support handler. Basic processing depends on the size of data.
+  For ULONG it only returns Flags. For KSPROPERTY_DESCRIPTION, the structure   
+  is filled.
+
+Arguments:
+
+  PropertyRequest - 
+
+  Flags - Support flags.
+
+  PropTypeSetId - PropTypeSetId
+
+Return Value:
+    
+    NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    ASSERT(Flags & KSPROPERTY_TYPE_BASICSUPPORT);
+
+    NTSTATUS                    ntStatus = STATUS_INVALID_PARAMETER;
+
+    if (PropertyRequest->ValueSize >= sizeof(KSPROPERTY_DESCRIPTION))
+    {
+        // if return buffer can hold a KSPROPERTY_DESCRIPTION, return it
+        //
+        PKSPROPERTY_DESCRIPTION PropDesc = 
+            PKSPROPERTY_DESCRIPTION(PropertyRequest->Value);
+
+        PropDesc->AccessFlags       = Flags;
+        PropDesc->DescriptionSize   = sizeof(KSPROPERTY_DESCRIPTION);
+        if  (VT_ILLEGAL != PropTypeSetId)
+        {
+            PropDesc->PropTypeSet.Set   = KSPROPTYPESETID_General;
+            PropDesc->PropTypeSet.Id    = PropTypeSetId;
+        }
+        else
+        {
+            PropDesc->PropTypeSet.Set   = GUID_NULL;
+            PropDesc->PropTypeSet.Id    = 0;
+        }
+        PropDesc->PropTypeSet.Flags = 0;
+        PropDesc->MembersListCount  = 0;
+        PropDesc->Reserved          = 0;
+
+        PropertyRequest->ValueSize = sizeof(KSPROPERTY_DESCRIPTION);
+        ntStatus = STATUS_SUCCESS;
+    } 
+    else if (PropertyRequest->ValueSize >= sizeof(ULONG))
+    {
+        // if return buffer can hold a ULONG, return the access flags
+        //
+        *(PULONG(PropertyRequest->Value)) = Flags;
+
+        PropertyRequest->ValueSize = sizeof(ULONG);
+        ntStatus = STATUS_SUCCESS;                    
+    }
+    else
+    {
+        PropertyRequest->ValueSize = 0;
+        ntStatus = STATUS_BUFFER_TOO_SMALL;
+    }
+
+    return ntStatus;
+} // PropertyHandler_BasicSupport
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+PropertyHandler_BasicSupportVolume
+(
+    _In_  PPCPROPERTY_REQUEST   PropertyRequest,
+    _In_  ULONG                 MaxChannels
+)
+/*++
+
+Routine Description:
+
+  Handles BasicSupport for Volume nodes.
+
+Arguments:
+    
+  PropertyRequest - property request structure.
+
+  MaxChannels - # of supported channels.
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    NTSTATUS                    ntStatus = STATUS_SUCCESS;
+    ULONG                       cbFullProperty = 
+        sizeof(KSPROPERTY_DESCRIPTION) +
+        sizeof(KSPROPERTY_MEMBERSHEADER) +
+        sizeof(KSPROPERTY_STEPPING_LONG) * MaxChannels;
+    
+    ASSERT(MaxChannels > 0);
+
+    if (PropertyRequest->ValueSize >= (sizeof(KSPROPERTY_DESCRIPTION)))
+    {
+        PKSPROPERTY_DESCRIPTION PropDesc = 
+            PKSPROPERTY_DESCRIPTION(PropertyRequest->Value);
+
+        PropDesc->AccessFlags       = KSPROPERTY_TYPE_ALL;
+        PropDesc->DescriptionSize   = cbFullProperty;
+        PropDesc->PropTypeSet.Set   = KSPROPTYPESETID_General;
+        PropDesc->PropTypeSet.Id    = VT_I4;
+        PropDesc->PropTypeSet.Flags = 0;
+        PropDesc->MembersListCount  = 1;
+        PropDesc->Reserved          = 0;
+
+        // if return buffer can also hold a range description, return it too
+        if(PropertyRequest->ValueSize >= cbFullProperty)
+        {
+            // fill in the members header
+            PKSPROPERTY_MEMBERSHEADER Members = 
+                PKSPROPERTY_MEMBERSHEADER(PropDesc + 1);
+
+            Members->MembersFlags   = KSPROPERTY_MEMBER_STEPPEDRANGES;
+            Members->MembersSize    = sizeof(KSPROPERTY_STEPPING_LONG);
+            Members->MembersCount   = MaxChannels;
+            Members->Flags          = KSPROPERTY_MEMBER_FLAG_BASICSUPPORT_MULTICHANNEL;
+
+            // fill in the stepped range
+            PKSPROPERTY_STEPPING_LONG Range = 
+                PKSPROPERTY_STEPPING_LONG(Members + 1);
+
+            for (ULONG i=0; i<MaxChannels; ++i)
+            {
+                Range[i].Bounds.SignedMaximum = VOLUME_SIGNED_MAXIMUM;   //   0 dB
+                Range[i].Bounds.SignedMinimum = VOLUME_SIGNED_MINIMUM;   // -96 dB
+                Range[i].SteppingDelta        = VOLUME_STEPPING_DELTA;   //  .5 dB
+                Range[i].Reserved             = 0;
+            }
+
+            // set the return value size
+            PropertyRequest->ValueSize = cbFullProperty;
+        } 
+        else
+        {
+            PropertyRequest->ValueSize = sizeof(KSPROPERTY_DESCRIPTION);
+        }
+    } 
+    else if(PropertyRequest->ValueSize >= sizeof(ULONG))
+    {
+        // if return buffer can hold a ULONG, return the access flags
+        PULONG AccessFlags = PULONG(PropertyRequest->Value);
+
+        PropertyRequest->ValueSize = sizeof(ULONG);
+        *AccessFlags = KSPROPERTY_TYPE_ALL;
+    }
+    else
+    {
+        PropertyRequest->ValueSize = 0;
+        ntStatus = STATUS_BUFFER_TOO_SMALL;
+    }
+
+    return ntStatus;
+} // PropertyHandlerBasicSupportVolume
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+PropertyHandler_BasicSupportMute
+(
+    _In_  PPCPROPERTY_REQUEST   PropertyRequest,
+    _In_  ULONG                 MaxChannels
+)
+/*++
+
+Routine Description:
+
+  Handles BasicSupport for Mute nodes.
+
+Arguments:
+    
+  PropertyRequest - property request structure.
+
+  MaxChannels - # of supported channels.
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    NTSTATUS                    ntStatus = STATUS_SUCCESS;
+    ULONG                       cbFullProperty = 
+        sizeof(KSPROPERTY_DESCRIPTION) +
+        sizeof(KSPROPERTY_MEMBERSHEADER) +
+        sizeof(KSPROPERTY_STEPPING_LONG) * MaxChannels;
+
+    ASSERT(MaxChannels > 0);
+    
+    if (PropertyRequest->ValueSize >= (sizeof(KSPROPERTY_DESCRIPTION)))
+    {
+        PKSPROPERTY_DESCRIPTION PropDesc = 
+            PKSPROPERTY_DESCRIPTION(PropertyRequest->Value);
+
+        PropDesc->AccessFlags       = KSPROPERTY_TYPE_ALL;
+        PropDesc->DescriptionSize   = cbFullProperty;
+        PropDesc->PropTypeSet.Set   = KSPROPTYPESETID_General;
+        PropDesc->PropTypeSet.Id    = VT_BOOL;
+        PropDesc->PropTypeSet.Flags = 0;
+        PropDesc->MembersListCount  = 1;
+        PropDesc->Reserved          = 0;
+
+        // if return buffer can also hold a range description, return it too
+        if(PropertyRequest->ValueSize >= cbFullProperty)
+        {
+            // fill in the members header
+            PKSPROPERTY_MEMBERSHEADER Members = 
+                PKSPROPERTY_MEMBERSHEADER(PropDesc + 1);
+
+            Members->MembersFlags   = KSPROPERTY_MEMBER_STEPPEDRANGES;
+            Members->MembersSize    = sizeof(KSPROPERTY_STEPPING_LONG);
+            Members->MembersCount   = MaxChannels;
+            Members->Flags          = KSPROPERTY_MEMBER_FLAG_BASICSUPPORT_MULTICHANNEL;
+
+            // fill in the stepped range
+            PKSPROPERTY_STEPPING_LONG Range = 
+                PKSPROPERTY_STEPPING_LONG(Members + 1);
+
+            for (ULONG i=0; i<MaxChannels; ++i)
+            {
+                Range[i].Bounds.SignedMaximum = 1;        // true
+                Range[i].Bounds.SignedMinimum = 0;        // false
+                Range[i].SteppingDelta        = 1;        // false <- -> true
+                Range[i].Reserved             = 0;
+            }
+
+            // set the return value size
+            PropertyRequest->ValueSize = cbFullProperty;
+        } 
+        else
+        {
+            PropertyRequest->ValueSize = sizeof(KSPROPERTY_DESCRIPTION);
+        }
+    } 
+    else if(PropertyRequest->ValueSize >= sizeof(ULONG))
+    {
+        // if return buffer can hold a ULONG, return the access flags
+        PULONG AccessFlags = PULONG(PropertyRequest->Value);
+
+        PropertyRequest->ValueSize = sizeof(ULONG);
+        *AccessFlags = KSPROPERTY_TYPE_ALL;
+    }
+    else
+    {
+        PropertyRequest->ValueSize = 0;
+        ntStatus = STATUS_BUFFER_TOO_SMALL;
+    }
+
+    return ntStatus;
+} // PropertyHandlerBasicSupportVolume
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+PropertyHandler_BasicSupportPeakMeter2
+(
+    _In_  PPCPROPERTY_REQUEST   PropertyRequest,
+    _In_  ULONG                 MaxChannels
+)
+/*++
+
+Routine Description:
+
+  Handles BasicSupport for peak meter nodes.
+
+Arguments:
+    
+  PropertyRequest - property request structure.
+
+  MaxChannels - # of supported channels.
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    NTSTATUS                    ntStatus = STATUS_SUCCESS;
+    ULONG                       cbFullProperty = 
+        sizeof(KSPROPERTY_DESCRIPTION) +
+        sizeof(KSPROPERTY_MEMBERSHEADER) +
+        sizeof(KSPROPERTY_STEPPING_LONG) * MaxChannels;
+    
+    ASSERT(MaxChannels > 0);
+
+    if (PropertyRequest->ValueSize >= (sizeof(KSPROPERTY_DESCRIPTION)))
+    {
+        PKSPROPERTY_DESCRIPTION PropDesc = 
+            PKSPROPERTY_DESCRIPTION(PropertyRequest->Value);
+
+        PropDesc->AccessFlags       = KSPROPERTY_TYPE_GET | KSPROPERTY_TYPE_BASICSUPPORT;
+        PropDesc->DescriptionSize   = cbFullProperty;
+        PropDesc->PropTypeSet.Set   = KSPROPTYPESETID_General;
+        PropDesc->PropTypeSet.Id    = VT_I4;
+        PropDesc->PropTypeSet.Flags = 0;
+        PropDesc->MembersListCount  = 1;
+        PropDesc->Reserved          = 0;
+
+        // if return buffer can also hold a range description, return it too
+        if(PropertyRequest->ValueSize >= cbFullProperty)
+        {
+            // fill in the members header
+            PKSPROPERTY_MEMBERSHEADER Members = 
+                PKSPROPERTY_MEMBERSHEADER(PropDesc + 1);
+
+            Members->MembersFlags   = KSPROPERTY_MEMBER_STEPPEDRANGES;
+            Members->MembersSize    = sizeof(KSPROPERTY_STEPPING_LONG);
+            Members->MembersCount   = MaxChannels;
+            Members->Flags          = KSPROPERTY_MEMBER_FLAG_BASICSUPPORT_MULTICHANNEL;
+
+            // fill in the stepped range
+            PKSPROPERTY_STEPPING_LONG Range = 
+                PKSPROPERTY_STEPPING_LONG(Members + 1);
+
+            for (ULONG i=0; i<MaxChannels; ++i)
+            {
+                Range[i].Bounds.SignedMaximum = PEAKMETER_SIGNED_MAXIMUM;
+                Range[i].Bounds.SignedMinimum = PEAKMETER_SIGNED_MINIMUM;
+                Range[i].SteppingDelta        = PEAKMETER_STEPPING_DELTA;
+                Range[i].Reserved             = 0;
+            }
+
+            // set the return value size
+            PropertyRequest->ValueSize = cbFullProperty;
+        } 
+        else
+        {
+            PropertyRequest->ValueSize = sizeof(KSPROPERTY_DESCRIPTION);
+        }
+    } 
+    else if(PropertyRequest->ValueSize >= sizeof(ULONG))
+    {
+        // if return buffer can hold a ULONG, return the access flags
+        PULONG AccessFlags = PULONG(PropertyRequest->Value);
+
+        PropertyRequest->ValueSize = sizeof(ULONG);
+        *AccessFlags = KSPROPERTY_TYPE_ALL;
+    }
+    else
+    {
+        PropertyRequest->ValueSize = 0;
+        ntStatus = STATUS_BUFFER_TOO_SMALL;
+    }
+
+    return ntStatus;
+} // PropertyHandlerBasicSupportVolume
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+PropertyHandler_CpuResources
+( 
+    _In_  PPCPROPERTY_REQUEST     PropertyRequest 
+)
+/*++
+
+Routine Description:
+
+  Processes KSPROPERTY_AUDIO_CPURESOURCES
+
+Arguments:
+    
+  PropertyRequest - property request structure.
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    DPF_ENTER(("[%s]",__FUNCTION__));
+
+    NTSTATUS ntStatus = STATUS_INVALID_DEVICE_REQUEST;
+
+    if (PropertyRequest->Verb & KSPROPERTY_TYPE_GET)
+    {
+        ntStatus = ValidatePropertyParams(PropertyRequest, sizeof(ULONG));
+        if (NT_SUCCESS(ntStatus))
+        {
+            *(PULONG(PropertyRequest->Value)) = KSAUDIO_CPU_RESOURCES_NOT_HOST_CPU;
+            PropertyRequest->ValueSize = sizeof(ULONG);
+        }
+    }
+    else if (PropertyRequest->Verb & KSPROPERTY_TYPE_BASICSUPPORT)
+    {
+        ntStatus = 
+            PropertyHandler_BasicSupport
+            ( 
+                PropertyRequest, 
+                KSPROPERTY_TYPE_GET | KSPROPERTY_TYPE_BASICSUPPORT,
+                VT_UI4
+            );
+    }
+
+    return ntStatus;
+} // PropertyHandlerCpuResources
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+PropertyHandler_Volume
+(
+    _In_  PADAPTERCOMMON        AdapterCommon,
+    _In_  PPCPROPERTY_REQUEST   PropertyRequest,
+    _In_  ULONG                 MaxChannels
+)
+/*++
+
+Routine Description:
+
+  Property handler for KSPROPERTY_AUDIO_VOLUMELEVEL
+
+Arguments:
+
+  AdapterCommon - interface to the common adapter object.
+  
+  PropertyRequest - property request structure.
+
+  MaxChannels - # of supported channels.
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    DPF_ENTER(("[%s]",__FUNCTION__));
+
+    NTSTATUS ntStatus = STATUS_INVALID_DEVICE_REQUEST;
+    ULONG    ulChannel;
+    PLONG    plVolume;
+
+    if (PropertyRequest->Verb & KSPROPERTY_TYPE_BASICSUPPORT)
+    {
+        ntStatus = PropertyHandler_BasicSupportVolume(
+                            PropertyRequest,
+                            MaxChannels);
+    }
+    else
+    {
+        ntStatus = 
+            ValidatePropertyParams
+            (
+                PropertyRequest, 
+                sizeof(LONG),    // volume value is a LONG
+                sizeof(ULONG)    // instance is the channel number
+            );
+        if (NT_SUCCESS(ntStatus))
+        {
+            ulChannel = * (PULONG (PropertyRequest->Instance));
+            plVolume  = PLONG (PropertyRequest->Value);
+
+            if (ulChannel >= MaxChannels &&
+                ulChannel != ALL_CHANNELS_ID)
+            {
+               ntStatus = STATUS_INVALID_PARAMETER;
+            }
+            else if (PropertyRequest->Verb & KSPROPERTY_TYPE_GET)
+            {
+                *plVolume = 
+                    AdapterCommon->MixerVolumeRead
+                    (
+                        PropertyRequest->Node, 
+                        ulChannel == ALL_CHANNELS_ID ? 0 : ulChannel
+                    );
+                PropertyRequest->ValueSize = sizeof(ULONG);                
+            }
+            else if (PropertyRequest->Verb & KSPROPERTY_TYPE_SET)
+            {
+                if (ALL_CHANNELS_ID == ulChannel)
+                {
+                    for (ULONG i=0; i<ulChannel; ++i)
+                    {
+                        AdapterCommon->MixerVolumeWrite
+                        (
+                            PropertyRequest->Node, 
+                            i, 
+                            VOLUME_NORMALIZE_IN_RANGE(*plVolume)
+                        );
+                    }
+                }
+                else 
+                {
+                    AdapterCommon->MixerVolumeWrite
+                    (
+                        PropertyRequest->Node, 
+                        ulChannel, 
+                        VOLUME_NORMALIZE_IN_RANGE(*plVolume)
+                    );
+                }
+            }
+        }
+
+        if (!NT_SUCCESS(ntStatus))
+        {
+            DPF(D_TERSE, ("[%s - ntStatus=0x%08x]",__FUNCTION__,ntStatus));
+        }
+    }
+
+    return ntStatus;
+} // PropertyHandlerVolume
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS                            
+PropertyHandler_Mute
+(
+    _In_  PADAPTERCOMMON        AdapterCommon,
+    _In_  PPCPROPERTY_REQUEST   PropertyRequest,
+    _In_  ULONG                 MaxChannels
+)
+/*++
+
+Routine Description:
+
+  Property handler for KSPROPERTY_AUDIO_MUTE
+
+Arguments:
+
+  AdapterCommon - interface to the common adapter object.
+  
+  PropertyRequest - property request structure.
+
+  MaxChannels - # of supported channels.
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    DPF_ENTER(("[%s]",__FUNCTION__));
+
+    NTSTATUS                    ntStatus;
+    ULONG                       ulChannel;
+    PBOOL                       pfMute;
+
+    if (PropertyRequest->Verb & KSPROPERTY_TYPE_BASICSUPPORT)
+    {
+        ntStatus = PropertyHandler_BasicSupportMute(
+                            PropertyRequest,
+                            MaxChannels);
+    }
+    else
+    {
+        ntStatus = 
+            ValidatePropertyParams
+            (   
+                PropertyRequest, 
+                sizeof(BOOL), 
+                sizeof(ULONG)
+            );
+        if (NT_SUCCESS(ntStatus))
+        {
+            ulChannel = * (PULONG (PropertyRequest->Instance));
+            pfMute    = PBOOL (PropertyRequest->Value);
+
+            if (ulChannel >= MaxChannels &&
+                ulChannel != ALL_CHANNELS_ID)
+            {
+               ntStatus = STATUS_INVALID_PARAMETER;
+            }
+            else if (PropertyRequest->Verb & KSPROPERTY_TYPE_GET)
+            {
+                *pfMute = 
+                    AdapterCommon->MixerMuteRead
+                    (
+                        PropertyRequest->Node,
+                        ulChannel == ALL_CHANNELS_ID ? 0 : ulChannel
+                    );
+                PropertyRequest->ValueSize = sizeof(BOOL);
+            }
+            else if (PropertyRequest->Verb & KSPROPERTY_TYPE_SET)
+            {
+                if (ALL_CHANNELS_ID == ulChannel)
+                {
+                    for (ULONG i=0; i<ulChannel; ++i)
+                    {
+                        AdapterCommon->MixerMuteWrite
+                        (
+                            PropertyRequest->Node,
+                            i,
+                            (*pfMute) ? TRUE : FALSE
+                        );
+                    }
+                }
+                else
+                {
+                    AdapterCommon->MixerMuteWrite
+                    (
+                        PropertyRequest->Node,
+                        ulChannel,
+                        (*pfMute) ? TRUE : FALSE
+                    );
+                }
+            }
+        }
+        
+        if (!NT_SUCCESS(ntStatus))
+        {
+            DPF(D_TERSE, ("[%s - ntStatus=0x%08x]",__FUNCTION__,ntStatus));
+        }
+    }
+
+    return ntStatus;
+} // PropertyHandlerMute
+
+//=============================================================================
+#pragma code_seg("PAGE")
+NTSTATUS
+PropertyHandler_PeakMeter2
+(
+    _In_  PADAPTERCOMMON        AdapterCommon,
+    _In_  PPCPROPERTY_REQUEST   PropertyRequest,
+    _In_  ULONG                 MaxChannels
+)
+/*++
+
+Routine Description:
+
+  Property handler for KSPROPERTY_AUDIO_PEAKMETER2
+
+Arguments:
+
+  AdapterCommon - interface to the common adapter object.
+  
+  PropertyRequest - property request structure.
+
+  MaxChannels - # of supported channels.
+
+Return Value:
+
+  NT status code.
+
+--*/
+{
+    PAGED_CODE();
+
+    DPF_ENTER(("[%s]",__FUNCTION__));
+
+    NTSTATUS ntStatus = STATUS_INVALID_DEVICE_REQUEST;
+    ULONG    ulChannel;
+    PLONG    plSample;
+
+    if (PropertyRequest->Verb & KSPROPERTY_TYPE_BASICSUPPORT)
+    {
+        ntStatus = PropertyHandler_BasicSupportPeakMeter2(
+                            PropertyRequest,
+                            MaxChannels);
+    }
+    else
+    {
+        ntStatus = 
+            ValidatePropertyParams
+            (
+                PropertyRequest, 
+                sizeof(LONG),    // sample value is a LONG
+                sizeof(ULONG)    // instance is the channel number
+            );
+        if (NT_SUCCESS(ntStatus))
+        {
+            ulChannel = * (PULONG (PropertyRequest->Instance));
+            plSample  = PLONG (PropertyRequest->Value);
+
+            if (ulChannel >= MaxChannels &&
+                ulChannel != ALL_CHANNELS_ID)
+            {
+               ntStatus = STATUS_INVALID_PARAMETER;
+            }
+            else if (PropertyRequest->Verb & KSPROPERTY_TYPE_GET)
+            {
+                *plSample = 
+                    PEAKMETER_NORMALIZE_IN_RANGE(
+                        AdapterCommon->MixerPeakMeterRead
+                        (
+                            PropertyRequest->Node, 
+                            ulChannel == ALL_CHANNELS_ID ? 0 : ulChannel
+                        ));
+                
+                PropertyRequest->ValueSize = sizeof(ULONG);                
+            }
+        }
+
+        if (!NT_SUCCESS(ntStatus))
+        {
+            DPF(D_TERSE, ("[%s - ntStatus=0x%08x]",__FUNCTION__,ntStatus));
+        }
+    }
+
+    return ntStatus;
+} // PropertyHandlerVolume
+
diff --git a/audio/simpleaudiosample/Source/Utilities/savedata.cpp b/audio/simpleaudiosample/Source/Utilities/savedata.cpp
new file mode 100644
index 00000000..7b2a11e9
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Utilities/savedata.cpp
@@ -0,0 +1,1033 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    savedata.cpp
+
+Abstract:
+
+    Implementation of Simple Audio Sample data saving class.
+
+    To save the playback data to disk, this class maintains a circular data
+    buffer, associated frame structures and worker items to save frames to
+    disk.
+    Each frame structure represents a portion of buffer. When that portion
+    of frame is full, a workitem is scheduled to save it to disk.
+--*/
+#pragma warning (disable : 4127)
+#pragma warning (disable : 26165)
+
+#include "definitions.h"
+#include "savedata.h"
+#include <ntstrsafe.h>   // This is for using RtlStringcbPrintf
+
+#define SAVEDATA_POOLTAG  'TDVS'
+#define SAVEDATA_POOLTAG1 '1DVS'
+#define SAVEDATA_POOLTAG2 '2DVS'
+#define SAVEDATA_POOLTAG3 '3DVS'
+#define SAVEDATA_POOLTAG4 '4DVS'
+#define SAVEDATA_POOLTAG5 '5DVS'
+#define SAVEDATA_POOLTAG6 '6DVS'
+#define SAVEDATA_POOLTAG7 '7DVS'
+
+//=============================================================================
+// Defines
+//=============================================================================
+#define RIFF_TAG                    0x46464952;
+#define WAVE_TAG                    0x45564157;
+#define FMT__TAG                    0x20746D66;
+#define DATA_TAG                    0x61746164;
+
+#define DEFAULT_FRAME_COUNT         4
+#define DEFAULT_FRAME_SIZE          PAGE_SIZE * 4 
+#define DEFAULT_BUFFER_SIZE         DEFAULT_FRAME_SIZE * DEFAULT_FRAME_COUNT
+
+#define DEFAULT_FILE_NAME           L"\\DosDevices\\C:\\STREAM"
+#define OSDATA_FILE_NAME            L"\\DosDevices\\O:\\STREAM"
+#define OFFLOAD_FILE_NAME           L"OFFLOAD"
+#define HOST_FILE_NAME              L"HOST"
+
+#define MAX_WORKER_ITEM_COUNT       15
+
+//=============================================================================
+// Statics
+//=============================================================================
+ULONG CSaveData::m_ulStreamId = 0;
+
+#pragma code_seg("PAGE")
+//=============================================================================
+// CSaveData
+//=============================================================================
+
+//=============================================================================
+CSaveData::CSaveData()
+:   m_pDataBuffer(NULL),
+    m_FileHandle(NULL),
+    m_ulFrameCount(DEFAULT_FRAME_COUNT),
+    m_ulBufferSize(DEFAULT_BUFFER_SIZE),
+    m_ulFrameSize(DEFAULT_FRAME_SIZE),
+    m_ulBufferOffset(0),
+    m_ulFrameIndex(0),
+    m_fFrameUsed(NULL),
+    m_waveFormat(NULL),
+    m_pFilePtr(NULL),
+    m_fWriteDisabled(FALSE),
+    m_bInitialized(FALSE)
+{
+    PAGED_CODE();
+
+    m_FileHeader.dwRiff           = RIFF_TAG;
+    m_FileHeader.dwFileSize       = 0;
+    m_FileHeader.dwWave           = WAVE_TAG;
+    m_FileHeader.dwFormat         = FMT__TAG;
+    m_FileHeader.dwFormatLength   = sizeof(WAVEFORMATEX);
+
+    m_DataHeader.dwData           = DATA_TAG;
+    m_DataHeader.dwDataLength     = 0;
+
+    RtlZeroMemory(&m_objectAttributes, sizeof(m_objectAttributes));
+} // CSaveData
+
+//=============================================================================
+CSaveData::~CSaveData()
+{
+    PAGED_CODE();
+
+    DPF_ENTER(("[CSaveData::~CSaveData]"));
+
+    // Update the wave header in data file with real file size.
+    //
+    if(m_pFilePtr)
+    {
+        m_FileHeader.dwFileSize =
+            (DWORD) m_pFilePtr->QuadPart - 2 * sizeof(DWORD);
+        m_DataHeader.dwDataLength = (DWORD) m_pFilePtr->QuadPart -
+                                     sizeof(m_FileHeader)        -
+                                     m_FileHeader.dwFormatLength -
+                                     sizeof(m_DataHeader);
+
+        if (STATUS_SUCCESS == KeWaitForSingleObject
+            (
+                &m_FileSync,
+                Executive,
+                KernelMode,
+                FALSE,
+                NULL
+            ))
+        {
+            if (NT_SUCCESS(FileOpen(FALSE)))
+            {
+                FileWriteHeader();
+
+                FileClose();
+            }
+
+            KeReleaseMutex(&m_FileSync, FALSE);
+        }
+    }
+
+    if (m_waveFormat)
+    {
+        ExFreePoolWithTag(m_waveFormat, SAVEDATA_POOLTAG1);
+        m_waveFormat = NULL;
+    }
+
+    if (m_fFrameUsed)
+    {
+        ExFreePoolWithTag(m_fFrameUsed, SAVEDATA_POOLTAG2);
+        m_fFrameUsed = NULL;
+        // NOTE : Do not release m_pFilePtr.
+    }
+
+    if (m_FileName.Buffer)
+    {
+        ExFreePoolWithTag(m_FileName.Buffer, SAVEDATA_POOLTAG3);
+        m_FileName.Buffer = NULL;
+    }
+
+    if (m_pDataBuffer)
+    {
+        ExFreePoolWithTag(m_pDataBuffer, SAVEDATA_POOLTAG4);
+        m_pDataBuffer = NULL;
+    }
+} // CSaveData
+
+//=============================================================================
+void
+CSaveData::DestroyWorkItems
+(
+    void
+)
+{
+    PAGED_CODE();
+
+    if (m_pWorkItems)
+    {
+        for (int i = 0; i < MAX_WORKER_ITEM_COUNT; i++)
+        {
+            if (m_pWorkItems[i].WorkItem!=NULL)
+            {
+                IoFreeWorkItem(m_pWorkItems[i].WorkItem);
+                m_pWorkItems[i].WorkItem = NULL;
+            }
+        }
+        ExFreePoolWithTag(m_pWorkItems, SAVEDATA_POOLTAG);
+        m_pWorkItems = NULL;
+    }
+
+} // DestroyWorkItems
+
+//=============================================================================
+void
+CSaveData::Disable
+(
+    _In_ BOOL                  fDisable
+)
+{
+    PAGED_CODE();
+
+    m_fWriteDisabled = fDisable;
+} // Disable
+
+//=============================================================================
+NTSTATUS
+CSaveData::FileClose(void)
+{
+    PAGED_CODE();
+
+    NTSTATUS                    ntStatus = STATUS_SUCCESS;
+
+    if (m_FileHandle)
+    {
+        ntStatus = ZwClose(m_FileHandle);
+        m_FileHandle = NULL;
+    }
+
+    return ntStatus;
+} // FileClose
+
+//=============================================================================
+NTSTATUS
+CSaveData::FileOpen
+(
+    _In_  BOOL                  fOverWrite
+)
+{
+    PAGED_CODE();
+
+    NTSTATUS                    ntStatus = STATUS_SUCCESS;
+    IO_STATUS_BLOCK             ioStatusBlock;
+
+    if( FALSE == m_bInitialized )
+    {
+        return STATUS_UNSUCCESSFUL;
+    }
+
+    if(!m_FileHandle)
+    {
+        ntStatus =
+            ZwCreateFile
+            (
+                &m_FileHandle,
+                GENERIC_WRITE | SYNCHRONIZE,
+                &m_objectAttributes,
+                &ioStatusBlock,
+                NULL,
+                FILE_ATTRIBUTE_NORMAL,
+                0,
+                fOverWrite ? FILE_OVERWRITE_IF : FILE_OPEN_IF,
+                FILE_NON_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT,
+                NULL,
+                0
+            );
+        if (!NT_SUCCESS(ntStatus))
+        {
+            DPF(D_TERSE, ("[CSaveData::FileOpen : Error opening data file]"));
+        }
+    }
+
+    return ntStatus;
+} // FileOpen
+
+//=============================================================================
+NTSTATUS
+CSaveData::FileWrite
+(
+    _In_reads_bytes_(ulDataSize)    PBYTE   pData,
+    _In_                            ULONG   ulDataSize
+)
+{
+    PAGED_CODE();
+
+    ASSERT(pData);
+    ASSERT(m_pFilePtr);
+
+    NTSTATUS                    ntStatus;
+
+    if (m_FileHandle)
+    {
+        IO_STATUS_BLOCK         ioStatusBlock;
+
+        ntStatus = ZwWriteFile( m_FileHandle,
+                                NULL,
+                                NULL,
+                                NULL,
+                                &ioStatusBlock,
+                                pData,
+                                ulDataSize,
+                                m_pFilePtr,
+                                NULL);
+
+        if (NT_SUCCESS(ntStatus))
+        {
+            ASSERT(ioStatusBlock.Information == ulDataSize);
+
+            m_pFilePtr->QuadPart += ulDataSize;
+        }
+        else
+        {
+            DPF(D_TERSE, ("[CSaveData::FileWrite : WriteFileError]"));
+        }
+    }
+    else
+    {
+        DPF(D_TERSE, ("[CSaveData::FileWrite : File not open]"));
+        ntStatus = STATUS_INVALID_HANDLE;
+    }
+
+    return ntStatus;
+} // FileWrite
+
+//=============================================================================
+NTSTATUS
+CSaveData::FileWriteHeader(void)
+{
+    PAGED_CODE();
+
+    NTSTATUS                    ntStatus;
+
+    if (m_FileHandle && m_waveFormat)
+    {
+        IO_STATUS_BLOCK         ioStatusBlock;
+
+        m_pFilePtr->QuadPart = 0;
+
+        m_FileHeader.dwFormatLength = (m_waveFormat->wFormatTag == WAVE_FORMAT_PCM) ?
+                                        sizeof( PCMWAVEFORMAT ) :
+                                        sizeof( WAVEFORMATEX ) + m_waveFormat->cbSize;
+
+        ntStatus = ZwWriteFile( m_FileHandle,
+                                NULL,
+                                NULL,
+                                NULL,
+                                &ioStatusBlock,
+                                &m_FileHeader,
+                                sizeof(m_FileHeader),
+                                m_pFilePtr,
+                                NULL);
+        if (!NT_SUCCESS(ntStatus))
+        {
+            DPF(D_TERSE, ("[CSaveData::FileWriteHeader : Write File Header Error]"));
+        }
+
+        m_pFilePtr->QuadPart += sizeof(m_FileHeader);
+
+        ntStatus = ZwWriteFile( m_FileHandle,
+                                NULL,
+                                NULL,
+                                NULL,
+                                &ioStatusBlock,
+                                m_waveFormat,
+                                m_FileHeader.dwFormatLength,
+                                m_pFilePtr,
+                                NULL);
+        if (!NT_SUCCESS(ntStatus))
+        {
+            DPF(D_TERSE, ("[CSaveData::FileWriteHeader : Write Format Error]"));
+        }
+
+        m_pFilePtr->QuadPart += m_FileHeader.dwFormatLength;
+
+        ntStatus = ZwWriteFile( m_FileHandle,
+                                NULL,
+                                NULL,
+                                NULL,
+                                &ioStatusBlock,
+                                &m_DataHeader,
+                                sizeof(m_DataHeader),
+                                m_pFilePtr,
+                                NULL);
+        if (!NT_SUCCESS(ntStatus))
+        {
+            DPF(D_TERSE, ("[CSaveData::FileWriteHeader : Write Data Header Error]"));
+        }
+
+        m_pFilePtr->QuadPart += sizeof(m_DataHeader);
+    }
+    else
+    {
+        DPF(D_TERSE, ("[CSaveData::FileWriteHeader : File not open]"));
+        ntStatus = STATUS_INVALID_HANDLE;
+    }
+
+    return ntStatus;
+} // FileWriteHeader
+NTSTATUS
+CSaveData::SetDeviceObject
+(
+    _In_  PDEVICE_OBJECT        DeviceObject
+)
+{
+    PAGED_CODE();
+
+    ASSERT(DeviceObject);
+
+    NTSTATUS                    ntStatus = STATUS_SUCCESS;
+    
+    m_pDeviceObject = DeviceObject;
+    return ntStatus;
+}
+
+PDEVICE_OBJECT
+CSaveData::GetDeviceObject
+(
+    void
+)
+{
+    PAGED_CODE();
+
+    return m_pDeviceObject;
+}
+
+#pragma code_seg()
+//=============================================================================
+PSAVEWORKER_PARAM
+CSaveData::GetNewWorkItem
+(
+    void
+)
+{
+    LARGE_INTEGER               timeOut = { 0 };
+    NTSTATUS                    ntStatus;
+
+    for (int i = 0; i < MAX_WORKER_ITEM_COUNT; i++)
+    {
+        ntStatus =
+            KeWaitForSingleObject
+            (
+                &m_pWorkItems[i].EventDone,
+                Executive,
+                KernelMode,
+                FALSE,
+                &timeOut
+            );
+        if (STATUS_SUCCESS == ntStatus)
+        {
+            if (m_pWorkItems[i].WorkItem)
+                return &(m_pWorkItems[i]);
+            else
+                return NULL;
+        }
+    }
+
+    return NULL;
+} // GetNewWorkItem
+#pragma code_seg("PAGE")
+
+//=============================================================================
+NTSTATUS
+CSaveData::Initialize
+(
+)
+{
+    PAGED_CODE();
+
+    NTSTATUS    ntStatus = STATUS_SUCCESS;
+    WCHAR       szTemp[MAX_PATH];
+    size_t      cLen;
+    OBJECT_ATTRIBUTES objectAttributes; 
+    UNICODE_STRING    osDataVolumeString;
+    HANDLE            osDataFileHandle = NULL;     
+    IO_STATUS_BLOCK   ioStatusBlock;
+
+    DPF_ENTER(("[CSaveData::Initialize]"));
+
+    m_ulStreamId++;
+
+    // Probe if OSData volume exists.
+    //
+    RtlStringCchPrintfW(szTemp, MAX_PATH, L"%s_probe.txt", OSDATA_FILE_NAME);
+    RtlInitUnicodeString(&osDataVolumeString, szTemp);
+    InitializeObjectAttributes
+    (
+        &objectAttributes,
+        &osDataVolumeString,
+        OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE,
+        NULL,
+        NULL
+    );
+
+    ntStatus =
+        ZwCreateFile
+        (
+            &osDataFileHandle,
+            GENERIC_WRITE | SYNCHRONIZE,
+            &objectAttributes,
+            &ioStatusBlock,
+            NULL,
+            FILE_ATTRIBUTE_NORMAL,
+            0,
+            FILE_OVERWRITE_IF,
+            FILE_NON_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT,
+            NULL,
+            0
+        );
+    if (NT_SUCCESS(ntStatus))
+    {
+        ZwClose(osDataFileHandle);
+    }
+
+    // Allocate data file name.
+    //
+    RtlStringCchPrintfW(szTemp, MAX_PATH, L"%s_%s_%d.wav", NT_SUCCESS(ntStatus) ? OSDATA_FILE_NAME : DEFAULT_FILE_NAME, HOST_FILE_NAME, m_ulStreamId);
+    m_FileName.Length = 0;
+    ntStatus = RtlStringCchLengthW (szTemp, sizeof(szTemp)/sizeof(szTemp[0]), &cLen);
+    if (NT_SUCCESS(ntStatus))
+    {
+        m_FileName.MaximumLength = (USHORT)((cLen * sizeof(WCHAR)) +  sizeof(WCHAR));//convert to wchar and add room for NULL
+        m_FileName.Buffer = (PWSTR)
+            ExAllocatePool2
+            (
+                POOL_FLAG_PAGED,
+                m_FileName.MaximumLength,
+                SAVEDATA_POOLTAG3
+            );
+        if (!m_FileName.Buffer)
+        {
+            DPF(D_TERSE, ("[Could not allocate memory for FileName]"));
+            ntStatus = STATUS_INSUFFICIENT_RESOURCES;
+        }
+    }
+
+    // Allocate memory for data buffer.
+    //
+    if (NT_SUCCESS(ntStatus))
+    {
+        RtlStringCbCopyW(m_FileName.Buffer, m_FileName.MaximumLength, szTemp);
+        m_FileName.Length = (USHORT)wcslen(m_FileName.Buffer) * sizeof(WCHAR);
+        DPF(D_BLAB, ("[New DataFile -- %S", m_FileName.Buffer));
+
+        m_pDataBuffer = (PBYTE)
+            ExAllocatePool2
+            (
+                POOL_FLAG_NON_PAGED,
+                m_ulBufferSize,
+                SAVEDATA_POOLTAG4
+            );
+        if (!m_pDataBuffer)
+        {
+            DPF(D_TERSE, ("[Could not allocate memory for Saving Data]"));
+            ntStatus = STATUS_INSUFFICIENT_RESOURCES;
+        }
+    }
+
+    // Allocate memory for frame usage flags and m_pFilePtr.
+    //
+    if (NT_SUCCESS(ntStatus))
+    {
+        m_fFrameUsed = (PBOOL)
+            ExAllocatePool2
+            (
+                POOL_FLAG_NON_PAGED,
+                m_ulFrameCount * sizeof(BOOL) +
+                sizeof(LARGE_INTEGER),
+                SAVEDATA_POOLTAG2
+            );
+        if (!m_fFrameUsed)
+        {
+            DPF(D_TERSE, ("[Could not allocate memory for frame flags]"));
+            ntStatus = STATUS_INSUFFICIENT_RESOURCES;
+        }
+    }
+
+    // Initialize the spinlock to synchronize access to the frames
+    //
+    KeInitializeSpinLock ( &m_FrameInUseSpinLock ) ;
+
+    // Initialize the file mutex
+    //
+    KeInitializeMutex( &m_FileSync, 1 ) ;
+
+    // Open the data file.
+    //
+    if (NT_SUCCESS(ntStatus))
+    {
+        // m_fFrameUsed has additional memory to hold m_pFilePtr
+        //
+        m_pFilePtr = (PLARGE_INTEGER)
+            (((PBYTE) m_fFrameUsed) + m_ulFrameCount * sizeof(BOOL));
+
+        // Create data file.
+        InitializeObjectAttributes
+        (
+            &m_objectAttributes,
+            &m_FileName,
+            OBJ_CASE_INSENSITIVE|OBJ_KERNEL_HANDLE,
+            NULL,
+            NULL
+        );
+
+        m_bInitialized = TRUE;
+
+        // Write wave header information to data file.
+        ntStatus = KeWaitForSingleObject
+            (
+                &m_FileSync,
+                Executive,
+                KernelMode,
+                FALSE,
+                NULL
+            );
+
+        if (STATUS_SUCCESS == ntStatus)
+        {
+            ntStatus = FileOpen(TRUE);
+            if (NT_SUCCESS(ntStatus))
+            {
+                ntStatus = FileWriteHeader();
+
+                FileClose();
+            }
+
+            KeReleaseMutex( &m_FileSync, FALSE );
+        }
+    }
+
+    return ntStatus;
+} // Initialize
+
+//=============================================================================
+NTSTATUS
+CSaveData::InitializeWorkItems
+(
+    _In_  PDEVICE_OBJECT        DeviceObject
+)
+{
+    PAGED_CODE();
+
+    ASSERT(DeviceObject);
+
+    NTSTATUS                    ntStatus = STATUS_SUCCESS;
+
+    DPF_ENTER(("[CSaveData::InitializeWorkItems]"));
+
+    if (m_pWorkItems != NULL)
+    {
+        return ntStatus;
+    }
+
+    m_pWorkItems = (PSAVEWORKER_PARAM)
+        ExAllocatePool2
+        (
+            POOL_FLAG_NON_PAGED,
+            sizeof(SAVEWORKER_PARAM) * MAX_WORKER_ITEM_COUNT,
+            SAVEDATA_POOLTAG
+        );
+    if (m_pWorkItems)
+    {
+        for (int i = 0; i < MAX_WORKER_ITEM_COUNT; i++)
+        {
+
+            m_pWorkItems[i].WorkItem = IoAllocateWorkItem(DeviceObject);
+            if(m_pWorkItems[i].WorkItem == NULL)
+            {
+              return STATUS_INSUFFICIENT_RESOURCES;
+            }
+            KeInitializeEvent
+            (
+                &m_pWorkItems[i].EventDone,
+                NotificationEvent,
+                TRUE
+            );
+        }
+    }
+    else
+    {
+        ntStatus = STATUS_INSUFFICIENT_RESOURCES;
+    }
+
+    return ntStatus;
+} // InitializeWorkItems
+
+//=============================================================================
+
+IO_WORKITEM_ROUTINE SaveFrameWorkerCallback;
+
+VOID
+SaveFrameWorkerCallback
+(
+    _In_        PDEVICE_OBJECT         pDeviceObject, 
+    _In_opt_    PVOID                  Context
+)
+{
+    UNREFERENCED_PARAMETER(pDeviceObject);
+
+    PAGED_CODE();
+
+    ASSERT(Context);
+
+    PSAVEWORKER_PARAM           pParam = (PSAVEWORKER_PARAM) Context;
+    PCSaveData                  pSaveData;
+    
+    if (NULL == pParam)
+    {
+        // This is completely unexpected, assert here.
+        //
+        ASSERT(pParam);
+        return;
+    }
+
+    DPF(D_VERBOSE, ("[SaveFrameWorkerCallback], %d", pParam->ulFrameNo));
+
+    ASSERT(pParam->pSaveData);
+    ASSERT(pParam->pSaveData->m_fFrameUsed);
+
+    if (pParam->WorkItem)
+    {
+        pSaveData = pParam->pSaveData;
+
+        if (STATUS_SUCCESS == KeWaitForSingleObject
+            (
+                &pSaveData->m_FileSync,
+                Executive,
+                KernelMode,
+                FALSE,
+                NULL
+            ))
+        {
+            if (NT_SUCCESS(pSaveData->FileOpen(FALSE)))
+            { 
+                pSaveData->FileWrite(pParam->pData, pParam->ulDataSize);
+                pSaveData->FileClose();
+            }
+            InterlockedExchange( (LONG *)&(pSaveData->m_fFrameUsed[pParam->ulFrameNo]), FALSE );
+
+            KeReleaseMutex( &pSaveData->m_FileSync, FALSE );
+        }
+    }
+
+    KeSetEvent(&pParam->EventDone, 0, FALSE);
+} // SaveFrameWorkerCallback
+
+//=============================================================================
+NTSTATUS
+CSaveData::SetDataFormat
+(
+    _In_ PKSDATAFORMAT          pDataFormat
+)
+{
+    PAGED_CODE();
+    NTSTATUS                    ntStatus = STATUS_SUCCESS;
+ 
+    DPF_ENTER(("[CSaveData::SetDataFormat]"));
+
+    ASSERT(pDataFormat);
+
+    PWAVEFORMATEX pwfx = NULL;
+
+    if (IsEqualGUIDAligned(pDataFormat->Specifier,
+        KSDATAFORMAT_SPECIFIER_DSOUND))
+    {
+        pwfx =
+            &(((PKSDATAFORMAT_DSOUND) pDataFormat)->BufferDesc.WaveFormatEx);
+    }
+    else if (IsEqualGUIDAligned(pDataFormat->Specifier,
+        KSDATAFORMAT_SPECIFIER_WAVEFORMATEX))
+    {
+        pwfx = &((PKSDATAFORMAT_WAVEFORMATEX) pDataFormat)->WaveFormatEx;
+    }
+
+    if (pwfx)
+    {
+        // Free the previously allocated waveformat
+        if (m_waveFormat)
+        {
+            ExFreePoolWithTag(m_waveFormat, SAVEDATA_POOLTAG1);
+        }
+
+        m_waveFormat = (PWAVEFORMATEX)
+            ExAllocatePool2
+            (
+                POOL_FLAG_NON_PAGED,
+                (pwfx->wFormatTag == WAVE_FORMAT_PCM) ?
+                sizeof( PCMWAVEFORMAT ) :
+                sizeof( WAVEFORMATEX ) + pwfx->cbSize,
+                SAVEDATA_POOLTAG1
+            );
+
+        if(m_waveFormat)
+        {
+            RtlCopyMemory( m_waveFormat,
+                           pwfx,
+                           (pwfx->wFormatTag == WAVE_FORMAT_PCM) ?
+                           sizeof( PCMWAVEFORMAT ) :
+                           sizeof( WAVEFORMATEX ) + pwfx->cbSize);
+        }
+        else
+        {
+            ntStatus = STATUS_INSUFFICIENT_RESOURCES;
+        }
+    }
+    return ntStatus;
+} // SetDataFormat
+
+//=============================================================================
+NTSTATUS
+CSaveData::SetMaxWriteSize
+(
+    _In_ ULONG ulMaxWriteSize
+)
+{
+    PAGED_CODE();
+    
+    NTSTATUS    ntStatus    = STATUS_SUCCESS;
+    ULONG       bufferSize  = 0;
+    PBYTE       buffer      = NULL;
+ 
+    DPF_ENTER(("[CSaveData::SetMaxWriteSize]"));
+
+    // 
+    // Compute new buffer size.
+    //
+    ntStatus = RtlULongMult(ulMaxWriteSize, DEFAULT_FRAME_COUNT, &bufferSize);
+    if (!NT_SUCCESS(ntStatus))
+    {
+        DPF(D_TERSE, ("[Could not allocate memory for Saving Data, MaxWriteSize %u is too big]", ulMaxWriteSize));
+        ntStatus = STATUS_INSUFFICIENT_RESOURCES;
+        goto Done;
+    }
+
+    //
+    // Alloc memory for buffer.
+    //
+    buffer = (PBYTE)
+        ExAllocatePool2
+        (
+            POOL_FLAG_NON_PAGED,
+            bufferSize,
+            SAVEDATA_POOLTAG4
+        );
+    if (!buffer)
+    {
+        DPF(D_TERSE, ("[Could not allocate memory for Saving Data]"));
+        ntStatus = STATUS_INSUFFICIENT_RESOURCES;
+        goto Done;
+    }
+
+    //
+    // Free old one.
+    //
+    if (m_pDataBuffer)
+    {
+        ExFreePoolWithTag(m_pDataBuffer, SAVEDATA_POOLTAG4);
+        m_pDataBuffer = NULL;
+    }
+
+    //
+    // Init new buffer settings.
+    //
+    m_pDataBuffer  = buffer;
+    m_ulBufferSize = bufferSize;
+    m_ulFrameSize  = ulMaxWriteSize;
+    
+    ntStatus = STATUS_SUCCESS;
+
+Done:
+    return ntStatus;
+} // SetDataFormat
+
+//=============================================================================
+void
+CSaveData::ReadData
+(
+    _Inout_updates_bytes_all_(ulByteCount)  PBYTE   pBuffer,
+    _In_                                    ULONG   ulByteCount
+)
+{
+    UNREFERENCED_PARAMETER(pBuffer);
+    UNREFERENCED_PARAMETER(ulByteCount);
+
+    PAGED_CODE();
+
+    // Not implemented yet.
+} // ReadData
+
+//=============================================================================
+#pragma code_seg()
+void
+CSaveData::SaveFrame
+(
+    _In_ ULONG                  ulFrameNo,
+    _In_ ULONG                  ulDataSize
+)
+{
+    PSAVEWORKER_PARAM           pParam = NULL;
+
+    DPF_ENTER(("[CSaveData::SaveFrame]"));
+
+    pParam = GetNewWorkItem();
+    if (pParam)
+    {
+        pParam->pSaveData = this;
+        pParam->ulFrameNo = ulFrameNo;
+        pParam->ulDataSize = ulDataSize;
+        pParam->pData = m_pDataBuffer + ulFrameNo * m_ulFrameSize;
+        KeResetEvent(&pParam->EventDone);
+        IoQueueWorkItem(pParam->WorkItem, SaveFrameWorkerCallback,
+                        CriticalWorkQueue, (PVOID)pParam);
+    }
+} // SaveFrame
+#pragma code_seg("PAGE")
+//=============================================================================
+void
+CSaveData::WaitAllWorkItems
+(
+    void
+)
+{
+    PAGED_CODE();
+
+    DPF_ENTER(("[CSaveData::WaitAllWorkItems]"));
+
+    // Save the last partially-filled frame
+    if (m_ulBufferOffset > m_ulFrameIndex * m_ulFrameSize)
+    {
+        ULONG size;
+        
+        size = m_ulBufferOffset - m_ulFrameIndex * m_ulFrameSize;
+        SaveFrame(m_ulFrameIndex, size);
+    }
+    
+    for (int i = 0; i < MAX_WORKER_ITEM_COUNT; i++)
+    {
+        DPF(D_VERBOSE, ("[Waiting for WorkItem] %d", i));
+        KeWaitForSingleObject
+        (
+            &(m_pWorkItems[i].EventDone),
+            Executive,
+            KernelMode,
+            FALSE,
+            NULL
+        );
+    }
+} // WaitAllWorkItems
+
+#pragma code_seg()
+//=============================================================================
+void
+CSaveData::WriteData
+(
+    _In_reads_bytes_(ulByteCount)   PBYTE   pBuffer,
+    _In_                            ULONG   ulByteCount
+)
+{
+    ASSERT(pBuffer);
+
+    BOOL                        fSaveFrame = FALSE;
+    ULONG                       ulSaveFrameIndex = 0;
+    KIRQL                       oldIrql;
+
+    // If stream writing is disabled, then exit.
+    //
+    if (m_fWriteDisabled)
+    {
+        return;
+    }
+
+    DPF_ENTER(("[CSaveData::WriteData ulByteCount=%lu]", ulByteCount));
+
+    if( 0 == ulByteCount )
+    {
+        return;
+    }
+
+    // The logic below assumes that write size is <= than frame size.
+    if (ulByteCount > m_ulFrameSize)
+    {
+        ulByteCount = m_ulFrameSize;
+    }
+        
+    // Check to see if this frame is available.
+    KeAcquireSpinLock(&m_FrameInUseSpinLock, &oldIrql);
+    if (!m_fFrameUsed[m_ulFrameIndex])
+    {
+        KeReleaseSpinLock(&m_FrameInUseSpinLock, oldIrql );
+
+        ULONG ulWriteBytes = ulByteCount;
+
+        if( (m_ulBufferSize - m_ulBufferOffset) < ulWriteBytes )
+        {
+            ulWriteBytes = m_ulBufferSize - m_ulBufferOffset;
+        }
+
+        RtlCopyMemory(m_pDataBuffer + m_ulBufferOffset, pBuffer, ulWriteBytes);
+        m_ulBufferOffset += ulWriteBytes;
+
+        // Check to see if we need to save this frame
+        if (m_ulBufferOffset >= ((m_ulFrameIndex + 1) * m_ulFrameSize))
+        {
+            fSaveFrame = TRUE;
+        }
+
+        // Loop the buffer, if we reached the end.
+        if (m_ulBufferOffset == m_ulBufferSize)
+        {
+            fSaveFrame = TRUE;
+            m_ulBufferOffset = 0;
+        }
+
+        if (fSaveFrame)
+        {
+            InterlockedExchange( (LONG *)&(m_fFrameUsed[m_ulFrameIndex]), TRUE );
+            ulSaveFrameIndex = m_ulFrameIndex;
+            m_ulFrameIndex = (m_ulFrameIndex + 1) % m_ulFrameCount;
+        }
+
+        // Write the left over if the next frame is available.
+        if (ulWriteBytes != ulByteCount)
+        {
+            KeAcquireSpinLock(&m_FrameInUseSpinLock, &oldIrql );
+            if (!m_fFrameUsed[m_ulFrameIndex])
+            {
+                KeReleaseSpinLock(&m_FrameInUseSpinLock, oldIrql );
+                RtlCopyMemory
+                (
+                    m_pDataBuffer + m_ulBufferOffset,
+                    pBuffer + ulWriteBytes,
+                    ulByteCount - ulWriteBytes
+                );
+                
+                m_ulBufferOffset += ulByteCount - ulWriteBytes;
+            }
+            else
+            {
+                KeReleaseSpinLock(&m_FrameInUseSpinLock, oldIrql);
+                DPF(D_BLAB, ("[Frame overflow, next frame is in use]"));
+            }
+        }
+
+        if (fSaveFrame)
+        {
+            SaveFrame(ulSaveFrameIndex, m_ulFrameSize);
+        }
+    }
+    else
+    {
+        KeReleaseSpinLock(&m_FrameInUseSpinLock, oldIrql );
+        DPF(D_BLAB, ("[Frame %d is in use]", m_ulFrameIndex));
+    }
+
+} // WriteData
+
diff --git a/audio/simpleaudiosample/Source/Utilities/savedata.h b/audio/simpleaudiosample/Source/Utilities/savedata.h
new file mode 100644
index 00000000..c658ec71
--- /dev/null
+++ b/audio/simpleaudiosample/Source/Utilities/savedata.h
@@ -0,0 +1,189 @@
+/*++
+
+Copyright (c) Microsoft Corporation All Rights Reserved
+
+Module Name:
+
+    savedata.h
+
+Abstract:
+
+    Declaration of Simple Audio Sample data saving class. This class supplies services
+to save data to disk.
+
+--*/
+
+#ifndef _SIMPLEAUDIOSAMPLE_SAVEDATA_H
+#define _SIMPLEAUDIOSAMPLE_SAVEDATA_H
+
+//-----------------------------------------------------------------------------
+//  Forward declaration
+//-----------------------------------------------------------------------------
+class CSaveData;
+typedef CSaveData *PCSaveData;
+
+
+//-----------------------------------------------------------------------------
+//  Structs
+//-----------------------------------------------------------------------------
+
+// Parameter to workitem.
+#include <pshpack1.h>
+typedef struct _SAVEWORKER_PARAM {
+    PIO_WORKITEM     WorkItem;
+    ULONG            ulFrameNo;
+    ULONG            ulDataSize;
+    PBYTE            pData;
+    PCSaveData       pSaveData;
+    KEVENT           EventDone;
+} SAVEWORKER_PARAM;
+typedef SAVEWORKER_PARAM *PSAVEWORKER_PARAM;
+#include <poppack.h>
+
+// wave file header.
+#include <pshpack1.h>
+typedef struct _OUTPUT_FILE_HEADER
+{
+    DWORD           dwRiff;
+    DWORD           dwFileSize;
+    DWORD           dwWave;
+    DWORD           dwFormat;
+    DWORD           dwFormatLength;
+} OUTPUT_FILE_HEADER;
+typedef OUTPUT_FILE_HEADER *POUTPUT_FILE_HEADER;
+
+typedef struct _OUTPUT_DATA_HEADER
+{
+    DWORD           dwData;
+    DWORD           dwDataLength;
+} OUTPUT_DATA_HEADER;
+typedef OUTPUT_DATA_HEADER *POUTPUT_DATA_HEADER;
+
+#include <poppack.h>
+
+//-----------------------------------------------------------------------------
+//  Classes
+//-----------------------------------------------------------------------------
+
+///////////////////////////////////////////////////////////////////////////////
+// CSaveData
+//   Saves the wave data to disk.
+//
+IO_WORKITEM_ROUTINE SaveFrameWorkerCallback;
+
+class CSaveData
+{
+protected:
+    UNICODE_STRING              m_FileName;         // DataFile name.
+    HANDLE                      m_FileHandle;       // DataFile handle.
+    PBYTE                       m_pDataBuffer;      // Data buffer.
+    ULONG                       m_ulBufferSize;     // Total buffer size.
+
+    ULONG                       m_ulFrameIndex;     // Current Frame.
+    ULONG                       m_ulFrameCount;     // Frame count.
+    ULONG                       m_ulFrameSize;
+    ULONG                       m_ulBufferOffset;   // index in buffer.
+    PBOOL                       m_fFrameUsed;       // Frame usage table.
+    KSPIN_LOCK                  m_FrameInUseSpinLock; // Spinlock for synch.
+    KMUTEX                      m_FileSync;         // Synchronizes file access
+
+    OBJECT_ATTRIBUTES           m_objectAttributes; // Used for opening file.
+
+    OUTPUT_FILE_HEADER          m_FileHeader;
+    PWAVEFORMATEX               m_waveFormat;
+    OUTPUT_DATA_HEADER          m_DataHeader;
+    PLARGE_INTEGER              m_pFilePtr;
+
+    static PDEVICE_OBJECT       m_pDeviceObject;
+    static ULONG                m_ulStreamId;
+    static PSAVEWORKER_PARAM    m_pWorkItems;
+
+    BOOL                        m_fWriteDisabled;
+
+    BOOL                        m_bInitialized;
+
+public:
+    CSaveData();
+    ~CSaveData();
+
+    static NTSTATUS             InitializeWorkItems
+    (
+        _In_  PDEVICE_OBJECT    DeviceObject
+    );
+    static void                 DestroyWorkItems
+    (
+        void
+    );
+    void                        Disable
+    (
+        _In_ BOOL               fDisable
+    );
+    static PSAVEWORKER_PARAM    GetNewWorkItem
+    (
+        void
+    );
+    NTSTATUS                    Initialize
+    (
+    );
+	static NTSTATUS             SetDeviceObject
+	(
+	    _In_  PDEVICE_OBJECT    DeviceObject
+	);
+	static PDEVICE_OBJECT       GetDeviceObject
+	(
+	    void
+	);
+    void                        ReadData
+    (
+        _Inout_updates_bytes_all_(ulByteCount)  PBYTE   pBuffer,
+        _In_                                    ULONG   ulByteCount
+    );
+    NTSTATUS                    SetDataFormat
+    (
+        _In_  PKSDATAFORMAT     pDataFormat
+    );
+    NTSTATUS                    SetMaxWriteSize
+    (
+        _In_  ULONG             ulMaxWriteSize
+    );  
+    void                        WaitAllWorkItems
+    (
+        void
+    );
+    void                        WriteData
+    (
+        _In_reads_bytes_(ulByteCount)   PBYTE   pBuffer,
+        _In_                            ULONG   ulByteCount
+    );
+
+private:
+    NTSTATUS                    FileClose
+    (
+        void
+    );
+    NTSTATUS                    FileOpen
+    (
+        _In_  BOOL              fOverWrite
+    );
+    NTSTATUS                    FileWrite
+    (
+        _In_reads_bytes_(ulDataSize)    PBYTE   pData,
+        _In_                            ULONG   ulDataSize
+    );
+    NTSTATUS                    FileWriteHeader
+    (
+        void
+    );
+
+    void                        SaveFrame
+    (
+        _In_ ULONG              ulFrameNo,
+        _In_ ULONG              ulDataSize
+    );
+
+    friend
+    IO_WORKITEM_ROUTINE         SaveFrameWorkerCallback;
+};
+typedef CSaveData *PCSaveData;
+
+#endif
author	judzmura <[email protected]>	2021-03-01 13:12:34 -0800
committer	GitHub <[email protected]>	2021-03-01 13:12:34 -0800
commit	9a2e9aecb9135e782c434e617f57bfbdf9d8f2fd (patch)
tree	c67dd7a72a15a8d72c7bb6c6e19c1086d5e15f08
parent	6c41d837b87a0b70fe5dcee78baeba4ef28c45ad (diff)