Merge branch 'refs/heads/master' into dwc2_ep0

# Conflicts:
#	examples/device/dfu/src/usb_descriptors.c
#	examples/device/dfu_runtime/src/usb_descriptors.c
#	src/device/usbd_control.c
#	src/portable/synopsys/dwc2/dcd_dwc2.c

5 files changed, 379 insertions, 247 deletions

diff --git a/src/device/dcd.h b/src/device/dcd.h
index 436c4555f..353f836ee 100644
--- a/src/device/dcd.h
+++ b/src/device/dcd.h
@@ -171,7 +171,12 @@ void dcd_edpt_stall           (uint8_t rhport, uint8_t ep_addr);
 // This API never calls with control endpoints, since it is auto cleared when receiving setup packet
 void dcd_edpt_clear_stall     (uint8_t rhport, uint8_t ep_addr);
 
-#ifdef TUP_DCD_EDPT_ISO_ALLOC
+#ifdef TUP_DCD_EDPT_CLOSE_API
+// Close an endpoint.
+void dcd_edpt_close(uint8_t rhport, uint8_t ep_addr);
+
+#else
+
 // Allocate packet buffer used by ISO endpoints
 // Some MCU need manual packet buffer allocation, we allocate the largest size to avoid clustering
 bool dcd_edpt_iso_alloc(uint8_t rhport, uint8_t ep_addr, uint16_t largest_packet_size);
@@ -179,10 +184,6 @@ bool dcd_edpt_iso_alloc(uint8_t rhport, uint8_t ep_addr, uint16_t largest_packet
 // Configure and enable an ISO endpoint according to descriptor
 bool dcd_edpt_iso_activate(uint8_t rhport, tusb_desc_endpoint_t const * desc_ep);
 
-#else
-// Close an endpoint.
-void dcd_edpt_close(uint8_t rhport, uint8_t ep_addr);
-
 #endif
 
 //--------------------------------------------------------------------+
@@ -214,7 +215,7 @@ TU_ATTR_ALWAYS_INLINE static inline void dcd_event_setup_received(uint8_t rhport
   dcd_event_t event;
   event.rhport = rhport;
   event.event_id = DCD_EVENT_SETUP_RECEIVED;
-  memcpy(&event.setup_received, setup, sizeof(tusb_control_request_t));
+  (void) memcpy(&event.setup_received, setup, sizeof(tusb_control_request_t));
   dcd_event_handler(&event, in_isr);
 }
 
diff --git a/src/device/usbd.c b/src/device/usbd.c
index 339ccf4b4..cf96f050d 100644
--- a/src/device/usbd.c
+++ b/src/device/usbd.c
@@ -352,9 +352,13 @@ TU_ATTR_ALWAYS_INLINE static inline usbd_class_driver_t const * get_driver(uint8
   if (drvid < _app_driver_count) {
     // Application drivers
     driver = &_app_driver[drvid];
-  } else if (drvid < TOTAL_DRIVER_COUNT && BUILTIN_DRIVER_COUNT > 0) {
-    driver = &_usbd_driver[drvid - _app_driver_count];
+  } else{
+    drvid -= _app_driver_count;
+    if (drvid < BUILTIN_DRIVER_COUNT) {
+      driver = &_usbd_driver[drvid];
+    }
   }
+
   return driver;
 }
 
@@ -572,7 +576,7 @@ bool tud_deinit(uint8_t rhport) {
   // Deinit device controller driver
   dcd_int_disable(rhport);
   dcd_disconnect(rhport);
-  dcd_deinit(rhport);
+  TU_VERIFY(dcd_deinit(rhport));
 
   // Deinit class drivers
   for (uint8_t i = 0; i < TOTAL_DRIVER_COUNT; i++) {
@@ -594,7 +598,6 @@ bool tud_deinit(uint8_t rhport) {
 #endif
 
   _usbd_rhport = RHPORT_INVALID;
-
   return true;
 }
 
@@ -606,8 +609,8 @@ static void configuration_reset(uint8_t rhport) {
   }
 
   tu_varclr(&_usbd_dev);
-  memset(_usbd_dev.itf2drv, DRVID_INVALID, sizeof(_usbd_dev.itf2drv)); // invalid mapping
-  memset(_usbd_dev.ep2drv, DRVID_INVALID, sizeof(_usbd_dev.ep2drv)); // invalid mapping
+  (void) memset(_usbd_dev.itf2drv, DRVID_INVALID, sizeof(_usbd_dev.itf2drv)); // invalid mapping
+  (void) memset(_usbd_dev.ep2drv, DRVID_INVALID, sizeof(_usbd_dev.ep2drv)); // invalid mapping
 }
 
 static void usbd_reset(uint8_t rhport) {
@@ -638,12 +641,16 @@ void tud_task_ext(uint32_t timeout_ms, bool in_isr) {
   (void) in_isr; // not implemented yet
 
   // Skip if stack is not initialized
-  if (!tud_inited()) return;
+  if (!tud_inited()) {
+    return;
+  }
 
   // Loop until there is no more events in the queue
   while (1) {
     dcd_event_t event;
-    if (!osal_queue_receive(_usbd_q, &event, timeout_ms)) return;
+    if (!osal_queue_receive(_usbd_q, &event, timeout_ms)) {
+      return;
+    }
 
 #if CFG_TUSB_DEBUG >= CFG_TUD_LOG_LEVEL
     if (event.event_id == DCD_EVENT_SETUP_RECEIVED) TU_LOG_USBD("\r\n"); // extra line for setup
@@ -667,7 +674,7 @@ void tud_task_ext(uint32_t timeout_ms, bool in_isr) {
         TU_ASSERT(_usbd_queued_setup > 0,);
         _usbd_queued_setup--;
         TU_LOG_BUF(CFG_TUD_LOG_LEVEL, &event.setup_received, 8);
-        if (_usbd_queued_setup) {
+        if (_usbd_queued_setup != 0) {
           TU_LOG_USBD("  Skipped since there is other SETUP in queue\r\n");
           break;
         }
@@ -703,8 +710,7 @@ void tud_task_ext(uint32_t timeout_ms, bool in_isr) {
         _usbd_dev.ep_status[epnum][ep_dir].claimed = 0;
 
         if (0 == epnum) {
-          usbd_control_xfer_cb(event.rhport, ep_addr, (xfer_result_t) event.xfer_complete.result,
-                               event.xfer_complete.len);
+          usbd_control_xfer_cb(event.rhport, ep_addr, (xfer_result_t) event.xfer_complete.result, event.xfer_complete.len);
         } else {
           usbd_class_driver_t const* driver = get_driver(_usbd_dev.ep2drv[epnum][ep_dir]);
           TU_ASSERT(driver,);
@@ -738,7 +744,7 @@ void tud_task_ext(uint32_t timeout_ms, bool in_isr) {
 
       case USBD_EVENT_FUNC_CALL:
         TU_LOG_USBD("\r\n");
-        if (event.func_call.func) {
+        if (event.func_call.func != NULL) {
           event.func_call.func(event.func_call.param);
         }
         break;
@@ -792,7 +798,7 @@ static bool process_control_request(uint8_t rhport, tusb_control_request_t const
   }
 #endif
 
-  switch ( p_request->bmRequestType_bit.recipient ) {
+  switch (p_request->bmRequestType_bit.recipient) { //-V2520
     //------------- Device Requests e.g in enumeration -------------//
     case TUSB_REQ_RCPT_DEVICE:
       if ( TUSB_REQ_TYPE_CLASS == p_request->bmRequestType_bit.type ) {
@@ -806,13 +812,13 @@ static bool process_control_request(uint8_t rhport, tusb_control_request_t const
         return invoke_class_control(rhport, driver, p_request);
       }
 
-      if ( TUSB_REQ_TYPE_STANDARD != p_request->bmRequestType_bit.type ) {
+      if (TUSB_REQ_TYPE_STANDARD != p_request->bmRequestType_bit.type) {
         // Non-standard request is not supported
         TU_BREAKPOINT();
         return false;
       }
 
-      switch ( p_request->bRequest ) {
+      switch (p_request->bRequest) { //-V2520
         case TUSB_REQ_SET_ADDRESS:
           // Depending on mcu, status phase could be sent either before or after changing device address,
           // or even require stack to not response with status at all
@@ -834,18 +840,15 @@ static bool process_control_request(uint8_t rhport, tusb_control_request_t const
 
           // Only process if new configure is different
           if (_usbd_dev.cfg_num != cfg_num) {
-            if ( _usbd_dev.cfg_num ) {
+            if (_usbd_dev.cfg_num != 0) {
               // already configured: need to clear all endpoints and driver first
               TU_LOG_USBD("  Clear current Configuration (%u) before switching\r\n", _usbd_dev.cfg_num);
 
-              // disable SOF
               dcd_sof_enable(rhport, false);
-
-              // close all non-control endpoints, cancel all pending transfers if any
               dcd_edpt_close_all(rhport);
 
               // close all drivers and current configured state except bus speed
-              uint8_t const speed = _usbd_dev.speed;
+              const uint8_t speed = _usbd_dev.speed;
               configuration_reset(rhport);
 
               _usbd_dev.speed = speed; // restore speed
@@ -853,18 +856,15 @@ static bool process_control_request(uint8_t rhport, tusb_control_request_t const
 
             _usbd_dev.cfg_num = cfg_num;
 
-            // Handle the new configuration and execute the corresponding callback
-            if ( cfg_num ) {
-              // switch to new configuration if not zero
+            // Handle the new configuration
+            if (cfg_num == 0) {
+              tud_umount_cb();
+            } else {
               if (!process_set_config(rhport, cfg_num)) {
-                TU_MESS_FAILED();
-                TU_BREAKPOINT();
                 _usbd_dev.cfg_num = 0;
-                return false;
+                TU_ASSERT(false);
               }
               tud_mount_cb();
-            } else {
-              tud_umount_cb();
             }
           }
 
@@ -873,17 +873,17 @@ static bool process_control_request(uint8_t rhport, tusb_control_request_t const
         break;
 
         case TUSB_REQ_GET_DESCRIPTOR:
-          TU_VERIFY( process_get_descriptor(rhport, p_request) );
+          TU_VERIFY(process_get_descriptor(rhport, p_request));
         break;
 
         case TUSB_REQ_SET_FEATURE:
-          switch(p_request->wValue) {
+          switch(p_request->wValue) { //-V2520
             case TUSB_REQ_FEATURE_REMOTE_WAKEUP:
               TU_LOG_USBD("    Enable Remote Wakeup\r\n");
               // Host may enable remote wake up before suspending especially HID device
               _usbd_dev.remote_wakeup_en = true;
               tud_control_status(rhport, p_request);
-            break;
+              break;
 
             #if CFG_TUD_TEST_MODE
             case TUSB_REQ_FEATURE_TEST_MODE: {
@@ -897,7 +897,7 @@ static bool process_control_request(uint8_t rhport, tusb_control_request_t const
               tud_control_status(rhport, p_request);
               break;
             }
-            #endif /* CFG_TUD_TEST_MODE */
+            #endif
 
             // Stall unsupported feature selector
             default: return false;
@@ -907,13 +907,12 @@ static bool process_control_request(uint8_t rhport, tusb_control_request_t const
         case TUSB_REQ_CLEAR_FEATURE:
           // Only support remote wakeup for device feature
           TU_VERIFY(TUSB_REQ_FEATURE_REMOTE_WAKEUP == p_request->wValue);
-
           TU_LOG_USBD("    Disable Remote Wakeup\r\n");
 
           // Host may disable remote wake up after resuming
           _usbd_dev.remote_wakeup_en = false;
           tud_control_status(rhport, p_request);
-        break;
+          break;
 
         case TUSB_REQ_GET_STATUS: {
           // Device status bit mask
@@ -939,24 +938,24 @@ static bool process_control_request(uint8_t rhport, tusb_control_request_t const
 
       // all requests to Interface (STD or Class) is forwarded to class driver.
       // notable requests are: GET HID REPORT DESCRIPTOR, SET_INTERFACE, GET_INTERFACE
-      if ( !invoke_class_control(rhport, driver, p_request) ) {
+      if (!invoke_class_control(rhport, driver, p_request)) {
         // For GET_INTERFACE and SET_INTERFACE, it is mandatory to respond even if the class
         // driver doesn't use alternate settings or implement this
         TU_VERIFY(TUSB_REQ_TYPE_STANDARD == p_request->bmRequestType_bit.type);
 
-        switch(p_request->bRequest) {
-          case TUSB_REQ_GET_INTERFACE:
-          case TUSB_REQ_SET_INTERFACE:
-            // Clear complete callback if driver set since it can also stall the request.
-            usbd_control_set_complete_callback(NULL);
+        // Clear complete callback if driver set since it can also stall the request.
+        usbd_control_set_complete_callback(NULL);
 
-            if (TUSB_REQ_GET_INTERFACE == p_request->bRequest) {
-              uint8_t alternate = 0;
-              tud_control_xfer(rhport, p_request, &alternate, 1);
-            }else {
-              tud_control_status(rhport, p_request);
-            }
-          break;
+        switch (p_request->bRequest) { //-V2520
+          case TUSB_REQ_GET_INTERFACE: {
+            uint8_t alternate = 0;
+            tud_control_xfer(rhport, p_request, &alternate, 1);
+            break;
+          }
+
+          case TUSB_REQ_SET_INTERFACE:
+            tud_control_status(rhport, p_request);
+            break;
 
           default: return false;
         }
@@ -973,15 +972,15 @@ static bool process_control_request(uint8_t rhport, tusb_control_request_t const
       TU_ASSERT(ep_num < TU_ARRAY_SIZE(_usbd_dev.ep2drv) );
       usbd_class_driver_t const * driver = get_driver(_usbd_dev.ep2drv[ep_num][ep_dir]);
 
-      if ( TUSB_REQ_TYPE_STANDARD != p_request->bmRequestType_bit.type ) {
+      if (TUSB_REQ_TYPE_STANDARD != p_request->bmRequestType_bit.type) {
         // Forward class request to its driver
         TU_VERIFY(driver);
         return invoke_class_control(rhport, driver, p_request);
       } else {
         // Handle STD request to endpoint
-        switch ( p_request->bRequest ) {
+        switch (p_request->bRequest) { //-V2520
           case TUSB_REQ_GET_STATUS: {
-            uint16_t status = usbd_edpt_stalled(rhport, ep_addr) ? 0x0001 : 0x0000;
+            uint16_t status = usbd_edpt_stalled(rhport, ep_addr) ? 0x0001u : 0x0000u;
             tud_control_xfer(rhport, p_request, &status, 2);
           }
           break;
@@ -996,7 +995,7 @@ static bool process_control_request(uint8_t rhport, tusb_control_request_t const
               }
             }
 
-            if (driver) {
+            if (driver != NULL) {
               // Some classes such as USBTMC needs to clear/re-init its buffer when receiving CLEAR_FEATURE request
               // We will also forward std request targeted endpoint to class drivers as well
 
@@ -1006,7 +1005,9 @@ static bool process_control_request(uint8_t rhport, tusb_control_request_t const
               usbd_control_set_complete_callback(NULL);
 
               // skip ZLP status if driver already did that
-              if ( !_usbd_dev.ep_status[0][TUSB_DIR_IN].busy ) tud_control_status(rhport, p_request);
+              if (!_usbd_dev.ep_status[0][TUSB_DIR_IN].busy) {
+                tud_control_status(rhport, p_request);
+              }
             }
           }
           break;
@@ -1017,8 +1018,8 @@ static bool process_control_request(uint8_t rhport, tusb_control_request_t const
             return false;
         }
       }
+      break;
     }
-    break;
 
     // Unknown recipient
     default:
@@ -1081,10 +1082,11 @@ static bool process_set_config(uint8_t rhport, uint8_t cfg_num)
 
         // Some drivers use 2 or more interfaces but may not have IAD e.g MIDI (always) or
         // BTH (even CDC) with class in device descriptor (single interface)
-        if ( assoc_itf_count == 1)
-        {
+        if (assoc_itf_count == 1) {
           #if CFG_TUD_CDC
-          if ( driver->open == cdcd_open ) assoc_itf_count = 2;
+          if ( driver->open == cdcd_open ) {
+            assoc_itf_count = 2;
+          }
           #endif
 
           #if CFG_TUD_MIDI
@@ -1101,6 +1103,28 @@ static bool process_set_config(uint8_t rhport, uint8_t cfg_num)
           #if CFG_TUD_BTH && CFG_TUD_BTH_ISO_ALT_COUNT
           if ( driver->open == btd_open ) assoc_itf_count = 2;
           #endif
+
+          #if CFG_TUD_AUDIO
+          if (driver->open == audiod_open) {
+            // UAC1 device doesn't have IAD, needs to read AS interface count from CS AC descriptor
+            if (TUSB_CLASS_AUDIO               == desc_itf->bInterfaceClass    &&
+                AUDIO_SUBCLASS_CONTROL         == desc_itf->bInterfaceSubClass &&
+                AUDIO_FUNC_PROTOCOL_CODE_UNDEF == desc_itf->bInterfaceProtocol) {
+              uint8_t const* p = tu_desc_next(p_desc);
+              uint8_t const* const itf_end = p_desc + remaining_len;
+              while (p < itf_end) {
+                if (TUSB_DESC_CS_INTERFACE == tu_desc_type(p) &&
+                    AUDIO10_CS_AC_INTERFACE_HEADER == ((audio10_desc_cs_ac_interface_1_t const *) p)->bDescriptorSubType) {
+                  audio10_desc_cs_ac_interface_1_t const * p_header = (audio10_desc_cs_ac_interface_1_t const *) p;
+                  // AC + AS interfaces
+                  assoc_itf_count = p_header->bInCollection + 1;
+                  break;
+                }
+                p = tu_desc_next(p);
+              }
+            }
+          }
+          #endif
         }
 
         // bind (associated) interfaces to found driver
@@ -1136,8 +1160,7 @@ static bool process_get_descriptor(uint8_t rhport, tusb_control_request_t const
   tusb_desc_type_t const desc_type = (tusb_desc_type_t) tu_u16_high(p_request->wValue);
   uint8_t const desc_index = tu_u16_low( p_request->wValue );
 
-  switch(desc_type)
-  {
+  switch(desc_type) { //-V2520
     case TUSB_DESC_DEVICE: {
       TU_LOG_USBD(" Device\r\n");
 
@@ -1165,7 +1188,7 @@ static bool process_get_descriptor(uint8_t rhport, tusb_control_request_t const
 
       // requested by host if USB > 2.0 ( i.e 2.1 or 3.x )
       uintptr_t desc_bos = (uintptr_t) tud_descriptor_bos_cb();
-      TU_VERIFY(desc_bos);
+      TU_VERIFY(desc_bos != 0);
 
       // Use offsetof to avoid pointer to the odd/misaligned address
       uint16_t const total_len = tu_le16toh( tu_unaligned_read16((const void*) (desc_bos + offsetof(tusb_desc_bos_t, wTotalLength))) );
@@ -1181,12 +1204,12 @@ static bool process_get_descriptor(uint8_t rhport, tusb_control_request_t const
       if ( desc_type == TUSB_DESC_CONFIGURATION ) {
         TU_LOG_USBD(" Configuration[%u]\r\n", desc_index);
         desc_config = (uintptr_t) tud_descriptor_configuration_cb(desc_index);
-        TU_ASSERT(desc_config);
+        TU_ASSERT(desc_config != 0);
       }else {
         // Host only request this after getting Device Qualifier descriptor
         TU_LOG_USBD(" Other Speed Configuration\r\n");
         desc_config = (uintptr_t) tud_descriptor_other_speed_configuration_cb(desc_index);
-        TU_VERIFY(desc_config);
+        TU_VERIFY(desc_config != 0);
       }
 
       // Use offsetof to avoid pointer to the odd/misaligned address
@@ -1196,8 +1219,7 @@ static bool process_get_descriptor(uint8_t rhport, tusb_control_request_t const
     }
     // break; // unreachable
 
-    case TUSB_DESC_STRING:
-    {
+    case TUSB_DESC_STRING: {
       TU_LOG_USBD(" String[%u]\r\n", desc_index);
 
       // String Descriptor always uses the desc set from user
diff --git a/src/device/usbd.h b/src/device/usbd.h
index f75803b14..c446638c3 100644
--- a/src/device/usbd.h
+++ b/src/device/usbd.h
@@ -95,7 +95,9 @@ bool tud_suspended(void);
 // Check if device is ready to transfer
 TU_ATTR_ALWAYS_INLINE static inline
 bool tud_ready(void) {
-  return tud_mounted() && !tud_suspended();
+  const bool is_mounted = tud_mounted();
+  const bool is_suspended = tud_suspended();
+  return is_mounted && !is_suspended;
 }
 
 // Remote wake up host, only if suspended and enabled by host
@@ -330,7 +332,7 @@ bool tud_vendor_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_requ
   /* Audio Control (AC) Interface */\
   9, TUSB_DESC_INTERFACE, _itfnum, 0, 0, TUSB_CLASS_AUDIO, AUDIO_SUBCLASS_CONTROL, AUDIO_FUNC_PROTOCOL_CODE_UNDEF, _stridx,\
   /* AC Header */\
-  9, TUSB_DESC_CS_INTERFACE, AUDIO_CS_AC_INTERFACE_HEADER, U16_TO_U8S_LE(0x0100), U16_TO_U8S_LE(0x0009), 1, (uint8_t)((_itfnum) + 1),\
+  9, TUSB_DESC_CS_INTERFACE, AUDIO10_CS_AC_INTERFACE_HEADER, U16_TO_U8S_LE(0x0100), U16_TO_U8S_LE(0x0009), 1, (uint8_t)((_itfnum) + 1),\
   /* MIDI Streaming (MS) Interface */\
   9, TUSB_DESC_INTERFACE, (uint8_t)((_itfnum) + 1), 0, 2, TUSB_CLASS_AUDIO, AUDIO_SUBCLASS_MIDI_STREAMING, AUDIO_FUNC_PROTOCOL_CODE_UNDEF, 0,\
   /* MS Header */\
@@ -383,242 +385,352 @@ bool tud_vendor_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_requ
   TUD_MIDI_JACKID_OUT_EMB(1)
 
 //--------------------------------------------------------------------+
-// Audio v2.0 Descriptor Templates
+// Audio Descriptor Templates
 //--------------------------------------------------------------------+
 
+
+/* Audio v1.0 Descriptor Templates */
+
+/* Standard AC Interface Descriptor UAC1 (4.3.1) */
+#define TUD_AUDIO10_DESC_STD_AC_LEN 9
+#define TUD_AUDIO10_DESC_STD_AC(_itfnum, _nEPs, _stridx) \
+  TUD_AUDIO10_DESC_STD_AC_LEN, TUSB_DESC_INTERFACE, _itfnum, 0x00, _nEPs, TUSB_CLASS_AUDIO, AUDIO_SUBCLASS_CONTROL, AUDIO_INT_PROTOCOL_CODE_V1, _stridx
+
+/* Class-Specific AC Interface Header Descriptor UAC1 (4.3.2) */
+#define TUD_AUDIO10_DESC_CS_AC_LEN(_nintfs) (8 + (_nintfs))
+// Class-Specific AC Interface Header descriptor, take list of streaming interface numbers as variable arguments
+#define TUD_AUDIO10_DESC_CS_AC(_bcdADC, _totallen, ...) \
+  TUD_AUDIO10_DESC_CS_AC_LEN(TU_ARGS_NUM(__VA_ARGS__)), TUSB_DESC_CS_INTERFACE, AUDIO10_CS_AC_INTERFACE_HEADER, U16_TO_U8S_LE(_bcdADC), U16_TO_U8S_LE(_totallen + TUD_AUDIO10_DESC_CS_AC_LEN(TU_ARGS_NUM(__VA_ARGS__))), TU_ARGS_NUM(__VA_ARGS__), __VA_ARGS__
+
+/* Input Terminal Descriptor UAC1 (4.3.2.1) */
+#define TUD_AUDIO10_DESC_INPUT_TERM_LEN 12
+#define TUD_AUDIO10_DESC_INPUT_TERM(_termid, _termtype, _assocTerm, _nchannels, _channelcfg, _idxchannelnames, _stridx) \
+  TUD_AUDIO10_DESC_INPUT_TERM_LEN, TUSB_DESC_CS_INTERFACE, AUDIO10_CS_AC_INTERFACE_INPUT_TERMINAL, _termid, U16_TO_U8S_LE(_termtype), _assocTerm, _nchannels, U16_TO_U8S_LE(_channelcfg), _idxchannelnames, _stridx
+
+/* Output Terminal Descriptor UAC1 (4.3.2.2) */
+#define TUD_AUDIO10_DESC_OUTPUT_TERM_LEN 9
+#define TUD_AUDIO10_DESC_OUTPUT_TERM(_termid, _termtype, _assocTerm, _srcid, _stridx) \
+  TUD_AUDIO10_DESC_OUTPUT_TERM_LEN, TUSB_DESC_CS_INTERFACE, AUDIO10_CS_AC_INTERFACE_OUTPUT_TERMINAL, _termid, U16_TO_U8S_LE(_termtype), _assocTerm, _srcid, _stridx
+
+/* Mixer Unit Descriptor UAC1 (4.3.2.3) - One Input Pin */
+#define TUD_AUDIO10_DESC_MIXER_UNIT_ONE_PIN_LEN(_ctrlsize) (11 + (_ctrlsize))
+#define TUD_AUDIO10_DESC_MIXER_UNIT_ONE_PIN(_unitid, _srcid, _nrchannels, _channelcfg, _idxchannelnames, _ctrlsize, _stridx, ...) \
+  TUD_AUDIO10_DESC_MIXER_UNIT_ONE_PIN_LEN(_ctrlsize), TUSB_DESC_CS_INTERFACE, AUDIO10_CS_AC_INTERFACE_MIXER_UNIT, _unitid, 1, _srcid, _nrchannels, U16_TO_U8S_LE(_channelcfg), _idxchannelnames, __VA_ARGS__, _stridx
+
+/* Selector Unit Descriptor UAC1 (4.3.2.4) - One Input Pin */
+#define TUD_AUDIO10_DESC_SELECTOR_UNIT_ONE_PIN_LEN 7
+#define TUD_AUDIO10_DESC_SELECTOR_UNIT_ONE_PIN(_unitid, _srcid, _stridx) \
+  TUD_AUDIO10_DESC_SELECTOR_UNIT_ONE_PIN_LEN, TUSB_DESC_CS_INTERFACE, AUDIO10_CS_AC_INTERFACE_SELECTOR_UNIT, _unitid, 1, _srcid, _stridx
+
+/* Feature Unit Descriptor UAC1 (4.3.2.5) - Variable Channels */
+#define TUD_AUDIO10_DESC_FEATURE_UNIT_LEN(_nchannels) (7 + ((_nchannels) + 1) * 2)
+// Feature Unit descriptor, take list of control bitmaps for master channel + each channel as variable arguments
+#define TUD_AUDIO10_DESC_FEATURE_UNIT(_unitid, _srcid, _stridx, ...) \
+  TUD_AUDIO10_DESC_FEATURE_UNIT_LEN(TU_ARGS_NUM(__VA_ARGS__) - 1), TUSB_DESC_CS_INTERFACE, AUDIO10_CS_AC_INTERFACE_FEATURE_UNIT, _unitid, _srcid, 2, TU_ARGS_APPLY_EXPAND(U16_TO_U8S_LE, __VA_ARGS__), _stridx
+
+/* Standard AS Interface Descriptor UAC1 (4.5.1) */
+#define TUD_AUDIO10_DESC_STD_AS_LEN 9
+#define TUD_AUDIO10_DESC_STD_AS_INT(_itfnum, _altset, _nEPs, _stridx) \
+  TUD_AUDIO10_DESC_STD_AS_LEN, TUSB_DESC_INTERFACE, _itfnum, _altset, _nEPs, TUSB_CLASS_AUDIO, AUDIO_SUBCLASS_STREAMING, AUDIO_INT_PROTOCOL_CODE_V1, _stridx
+
+/* Class-Specific AS Interface Descriptor UAC1 (4.5.2) */
+#define TUD_AUDIO10_DESC_CS_AS_INT_LEN 7
+#define TUD_AUDIO10_DESC_CS_AS_INT(_termid, _delay, _formattype) \
+  TUD_AUDIO10_DESC_CS_AS_INT_LEN, TUSB_DESC_CS_INTERFACE, AUDIO10_CS_AS_INTERFACE_AS_GENERAL, _termid, _delay, U16_TO_U8S_LE(_formattype)
+
+/* Type I Format Type Descriptor UAC1 (2.2.5) */
+#define TUD_AUDIO10_DESC_TYPE_I_FORMAT_LEN(_nfreqs) (8 + (_nfreqs)*3)
+// Type I Format descriptor, take list of sample rates in Hz as variable arguments
+#define TUD_AUDIO10_DESC_TYPE_I_FORMAT(_nrchannels, _subframesize, _bitresolution, ...) \
+  TUD_AUDIO10_DESC_TYPE_I_FORMAT_LEN(TU_ARGS_NUM(__VA_ARGS__)), TUSB_DESC_CS_INTERFACE, AUDIO10_CS_AS_INTERFACE_FORMAT_TYPE, AUDIO10_FORMAT_TYPE_I, _nrchannels, _subframesize, _bitresolution, TU_ARGS_NUM(__VA_ARGS__), TU_ARGS_APPLY_EXPAND(U24_TO_U8S_LE, __VA_ARGS__)
+
+/* Standard AS Isochronous Audio Data Endpoint Descriptor UAC1 (4.6.1.1) */
+#define TUD_AUDIO10_DESC_STD_AS_ISO_EP_LEN 9
+#define TUD_AUDIO10_DESC_STD_AS_ISO_EP(_ep, _attr, _maxEPsize, _interval, _sync_ep) \
+  TUD_AUDIO10_DESC_STD_AS_ISO_EP_LEN, TUSB_DESC_ENDPOINT, _ep, _attr, U16_TO_U8S_LE(_maxEPsize), _interval, 0x00, _sync_ep
+
+/* Class-Specific AS Isochronous Audio Data Endpoint Descriptor UAC1 (4.6.1.2) */
+#define TUD_AUDIO10_DESC_CS_AS_ISO_EP_LEN 7
+#define TUD_AUDIO10_DESC_CS_AS_ISO_EP(_attr, _lockdelayunits, _lockdelay) \
+  TUD_AUDIO10_DESC_CS_AS_ISO_EP_LEN, TUSB_DESC_CS_ENDPOINT, AUDIO10_CS_EP_SUBTYPE_GENERAL, _attr, _lockdelayunits, U16_TO_U8S_LE(_lockdelay)
+
+/* Standard AS Isochronous Synch Endpoint Descriptor UAC1 (4.6.2.1) */
+#define TUD_AUDIO10_DESC_STD_AS_ISO_SYNC_EP_LEN 9
+#define TUD_AUDIO10_DESC_STD_AS_ISO_SYNC_EP(_ep, _bRefresh) \
+  TUD_AUDIO10_DESC_STD_AS_ISO_SYNC_EP_LEN, TUSB_DESC_ENDPOINT, _ep, TUSB_XFER_ISOCHRONOUS, U16_TO_U8S_LE(3), 1, _bRefresh, 0x00
+
+/* Standard AC Interrupt Endpoint Descriptor UAC1 (4.4.2) */
+#define TUD_AUDIO10_DESC_STD_AC_INT_EP_LEN 9
+#define TUD_AUDIO10_DESC_STD_AC_INT_EP(_ep, _interval) \
+  TUD_AUDIO10_DESC_STD_AC_INT_EP_LEN, TUSB_DESC_ENDPOINT, _ep, TUSB_XFER_INTERRUPT, U16_TO_U8S_LE(2), _interval, 0x00, 0x00
+
+// AUDIO simple descriptor templates for UAC1
+
+// AUDIO simple descriptor (UAC1) for 1 microphone input
+// - 1 Input Terminal, 1 Feature Unit (Mute and Volume Control), 1 Output Terminal
+
+#define TUD_AUDIO10_MIC_ONE_CH_DESC_LEN(_nfreqs) (\
+  + TUD_AUDIO10_DESC_STD_AC_LEN\
+  + TUD_AUDIO10_DESC_CS_AC_LEN(1)\
+  + TUD_AUDIO10_DESC_INPUT_TERM_LEN\
+  + TUD_AUDIO10_DESC_OUTPUT_TERM_LEN\
+  + TUD_AUDIO10_DESC_FEATURE_UNIT_LEN(1)\
+  + TUD_AUDIO10_DESC_STD_AS_LEN\
+  + TUD_AUDIO10_DESC_STD_AS_LEN\
+  + TUD_AUDIO10_DESC_CS_AS_INT_LEN\
+  + TUD_AUDIO10_DESC_TYPE_I_FORMAT_LEN(_nfreqs)\
+  + TUD_AUDIO10_DESC_STD_AS_ISO_EP_LEN\
+  + TUD_AUDIO10_DESC_CS_AS_ISO_EP_LEN)
+
+#define TUD_AUDIO10_MIC_ONE_CH_DESCRIPTOR(_itfnum, _stridx, _nBytesPerSample, _nBitsUsedPerSample, _epin, _epsize, ...) \
+  /* Standard AC Interface Descriptor(4.3.1) */\
+  TUD_AUDIO10_DESC_STD_AC(/*_itfnum*/ _itfnum, /*_nEPs*/ 0x00, /*_stridx*/ _stridx),\
+  /* Class-Specific AC Interface Header Descriptor(4.3.2) */\
+  TUD_AUDIO10_DESC_CS_AC(/*_bcdADC*/ 0x0100, /*_totallen*/ (TUD_AUDIO10_DESC_INPUT_TERM_LEN+TUD_AUDIO10_DESC_OUTPUT_TERM_LEN+TUD_AUDIO10_DESC_FEATURE_UNIT_LEN(1)), /*_itf*/ ((_itfnum)+1)),\
+  /* Input Terminal Descriptor(4.3.2.1) */\
+  TUD_AUDIO10_DESC_INPUT_TERM(/*_termid*/ 0x01, /*_termtype*/ AUDIO_TERM_TYPE_IN_GENERIC_MIC, /*_assocTerm*/ 0x03, /*_nchannels*/ 0x01, /*_channelcfg*/ AUDIO10_CHANNEL_CONFIG_NON_PREDEFINED, /*_idxchannelnames*/ 0x00, /*_stridx*/ 0x00),\
+  /* Output Terminal Descriptor(4.3.2.2) */\
+  TUD_AUDIO10_DESC_OUTPUT_TERM(/*_termid*/ 0x03, /*_termtype*/ AUDIO_TERM_TYPE_USB_STREAMING, /*_assocTerm*/ 0x01, /*_srcid*/ 0x02, /*_stridx*/ 0x00),\
+  /* Feature Unit Descriptor(4.3.2.5) */\
+  TUD_AUDIO10_DESC_FEATURE_UNIT(/*_unitid*/ 0x02, /*_srcid*/ 0x01, /*_stridx*/ 0x00, /*_ctrlmaster*/ (AUDIO10_FU_CONTROL_BM_MUTE | AUDIO10_FU_CONTROL_BM_VOLUME), /*_ctrlch1*/ (AUDIO10_FU_CONTROL_BM_MUTE | AUDIO10_FU_CONTROL_BM_VOLUME)),\
+  /* Standard AS Interface Descriptor(4.5.1) */\
+  /* Interface 1, Alternate 0 - default alternate setting with 0 bandwidth */\
+  TUD_AUDIO10_DESC_STD_AS_INT(/*_itfnum*/ (uint8_t)((_itfnum)+1), /*_altset*/ 0x00, /*_nEPs*/ 0x00, /*_stridx*/ 0x00),\
+  /* Standard AS Interface Descriptor(4.5.1) */\
+  /* Interface 1, Alternate 1 - alternate interface for data streaming */\
+  TUD_AUDIO10_DESC_STD_AS_INT(/*_itfnum*/ (uint8_t)((_itfnum)+1), /*_altset*/ 0x01, /*_nEPs*/ 0x01, /*_stridx*/ 0x00),\
+  /* Class-Specific AS Interface Descriptor(4.5.2) */\
+  TUD_AUDIO10_DESC_CS_AS_INT(/*_termid*/ 0x03, /*_delay*/ 0x01, /*_formattype*/ AUDIO10_DATA_FORMAT_TYPE_I_PCM),\
+  /* Type I Format Type Descriptor(2.2.5) */\
+  TUD_AUDIO10_DESC_TYPE_I_FORMAT(/*_nrchannels*/ 0x01, /*_subframesize*/ _nBytesPerSample, /*_bitresolution*/ _nBitsUsedPerSample, /*_freq*/ __VA_ARGS__),\
+  /* Standard AS Isochronous Audio Data Endpoint Descriptor(4.6.1.1) */\
+  TUD_AUDIO10_DESC_STD_AS_ISO_EP(/*_ep*/ _epin, /*_attr*/ (uint8_t) ((uint8_t)TUSB_XFER_ISOCHRONOUS | (uint8_t)TUSB_ISO_EP_ATT_ASYNCHRONOUS), /*_maxEPsize*/ _epsize, /*_interval*/ 0x01, /* _sync_ep */ 0x00),\
+  /* Class-Specific AS Isochronous Audio Data Endpoint Descriptor(4.6.1.2) */\
+  TUD_AUDIO10_DESC_CS_AS_ISO_EP(/*_attr*/ AUDIO10_CS_AS_ISO_DATA_EP_ATT_SAMPLING_FRQ, /*_lockdelayunits*/ AUDIO10_CS_AS_ISO_DATA_EP_LOCK_DELAY_UNIT_MILLISEC, /*_lockdelay*/ 0x0001)
+
+/* Audio v2.0 Descriptor Templates */
+
 /* Standard Interface Association Descriptor (IAD) */
-#define TUD_AUDIO_DESC_IAD_LEN 8
-#define TUD_AUDIO_DESC_IAD(_firstitf, _nitfs, _stridx) \
-  TUD_AUDIO_DESC_IAD_LEN, TUSB_DESC_INTERFACE_ASSOCIATION, _firstitf, _nitfs, TUSB_CLASS_AUDIO, AUDIO_FUNCTION_SUBCLASS_UNDEFINED, AUDIO_FUNC_PROTOCOL_CODE_V2, _stridx
+#define TUD_AUDIO20_DESC_IAD_LEN 8
+#define TUD_AUDIO20_DESC_IAD(_firstitf, _nitfs, _stridx) \
+  TUD_AUDIO20_DESC_IAD_LEN, TUSB_DESC_INTERFACE_ASSOCIATION, _firstitf, _nitfs, TUSB_CLASS_AUDIO, AUDIO_FUNCTION_SUBCLASS_UNDEFINED, AUDIO_FUNC_PROTOCOL_CODE_V2, _stridx
 
 /* Standard AC Interface Descriptor(4.7.1) */
-#define TUD_AUDIO_DESC_STD_AC_LEN 9
-#define TUD_AUDIO_DESC_STD_AC(_itfnum, _nEPs, _stridx) /* _nEPs is 0 or 1 */\
-  TUD_AUDIO_DESC_STD_AC_LEN, TUSB_DESC_INTERFACE, _itfnum, /* fixed to zero */ 0x00, _nEPs, TUSB_CLASS_AUDIO, AUDIO_SUBCLASS_CONTROL, AUDIO_INT_PROTOCOL_CODE_V2, _stridx
+#define TUD_AUDIO20_DESC_STD_AC_LEN 9
+#define TUD_AUDIO20_DESC_STD_AC(_itfnum, _nEPs, _stridx) /* _nEPs is 0 or 1 */\
+  TUD_AUDIO20_DESC_STD_AC_LEN, TUSB_DESC_INTERFACE, _itfnum, /* fixed to zero */ 0x00, _nEPs, TUSB_CLASS_AUDIO, AUDIO_SUBCLASS_CONTROL, AUDIO_INT_PROTOCOL_CODE_V2, _stridx
 
 /* Class-Specific AC Interface Header Descriptor(4.7.2) */
-#define TUD_AUDIO_DESC_CS_AC_LEN 9
-#define TUD_AUDIO_DESC_CS_AC(_bcdADC, _category, _totallen, _ctrl) /* _bcdADC : Audio Device Class Specification Release Number in Binary-Coded Decimal, _category : see audio_function_t, _totallen : Total number of bytes returned for the class-specific AudioControl interface i.e. Clock Source, Unit and Terminal descriptors - Do not include TUD_AUDIO_DESC_CS_AC_LEN, we already do this here*/ \
-  TUD_AUDIO_DESC_CS_AC_LEN, TUSB_DESC_CS_INTERFACE, AUDIO_CS_AC_INTERFACE_HEADER, U16_TO_U8S_LE(_bcdADC), _category, U16_TO_U8S_LE(_totallen + TUD_AUDIO_DESC_CS_AC_LEN), _ctrl
+#define TUD_AUDIO20_DESC_CS_AC_LEN 9
+#define TUD_AUDIO20_DESC_CS_AC(_bcdADC, _category, _totallen, _ctrl) /* _bcdADC : Audio Device Class Specification Release Number in Binary-Coded Decimal, _category : see audio20_function_t, _totallen : Total number of bytes returned for the class-specific AudioControl interface i.e. Clock Source, Unit and Terminal descriptors - Do not include TUD_AUDIO20_DESC_CS_AC_LEN, we already do this here*/ \
+  TUD_AUDIO20_DESC_CS_AC_LEN, TUSB_DESC_CS_INTERFACE, AUDIO20_CS_AC_INTERFACE_HEADER, U16_TO_U8S_LE(_bcdADC), _category, U16_TO_U8S_LE(_totallen + TUD_AUDIO20_DESC_CS_AC_LEN), _ctrl
 
 /* Clock Source Descriptor(4.7.2.1) */
-#define TUD_AUDIO_DESC_CLK_SRC_LEN 8
-#define TUD_AUDIO_DESC_CLK_SRC(_clkid, _attr, _ctrl, _assocTerm, _stridx) \
-  TUD_AUDIO_DESC_CLK_SRC_LEN, TUSB_DESC_CS_INTERFACE, AUDIO_CS_AC_INTERFACE_CLOCK_SOURCE, _clkid, _attr, _ctrl, _assocTerm, _stridx
+#define TUD_AUDIO20_DESC_CLK_SRC_LEN 8
+#define TUD_AUDIO20_DESC_CLK_SRC(_clkid, _attr, _ctrl, _assocTerm, _stridx) \
+  TUD_AUDIO20_DESC_CLK_SRC_LEN, TUSB_DESC_CS_INTERFACE, AUDIO20_CS_AC_INTERFACE_CLOCK_SOURCE, _clkid, _attr, _ctrl, _assocTerm, _stridx
 
 /* Input Terminal Descriptor(4.7.2.4) */
-#define TUD_AUDIO_DESC_INPUT_TERM_LEN 17
-#define TUD_AUDIO_DESC_INPUT_TERM(_termid, _termtype, _assocTerm, _clkid, _nchannelslogical, _channelcfg, _idxchannelnames, _ctrl, _stridx) \
-  TUD_AUDIO_DESC_INPUT_TERM_LEN, TUSB_DESC_CS_INTERFACE, AUDIO_CS_AC_INTERFACE_INPUT_TERMINAL, _termid, U16_TO_U8S_LE(_termtype), _assocTerm, _clkid, _nchannelslogical, U32_TO_U8S_LE(_channelcfg), _idxchannelnames, U16_TO_U8S_LE(_ctrl), _stridx
+#define TUD_AUDIO20_DESC_INPUT_TERM_LEN 17
+#define TUD_AUDIO20_DESC_INPUT_TERM(_termid, _termtype, _assocTerm, _clkid, _nchannelslogical, _channelcfg, _idxchannelnames, _ctrl, _stridx) \
+  TUD_AUDIO20_DESC_INPUT_TERM_LEN, TUSB_DESC_CS_INTERFACE, AUDIO20_CS_AC_INTERFACE_INPUT_TERMINAL, _termid, U16_TO_U8S_LE(_termtype), _assocTerm, _clkid, _nchannelslogical, U32_TO_U8S_LE(_channelcfg), _idxchannelnames, U16_TO_U8S_LE(_ctrl), _stridx
 
 /* Output Terminal Descriptor(4.7.2.5) */
-#define TUD_AUDIO_DESC_OUTPUT_TERM_LEN 12
-#define TUD_AUDIO_DESC_OUTPUT_TERM(_termid, _termtype, _assocTerm, _srcid, _clkid, _ctrl, _stridx) \
-  TUD_AUDIO_DESC_OUTPUT_TERM_LEN, TUSB_DESC_CS_INTERFACE, AUDIO_CS_AC_INTERFACE_OUTPUT_TERMINAL, _termid, U16_TO_U8S_LE(_termtype), _assocTerm, _srcid, _clkid, U16_TO_U8S_LE(_ctrl), _stridx
+#define TUD_AUDIO20_DESC_OUTPUT_TERM_LEN 12
+#define TUD_AUDIO20_DESC_OUTPUT_TERM(_termid, _termtype, _assocTerm, _srcid, _clkid, _ctrl, _stridx) \
+  TUD_AUDIO20_DESC_OUTPUT_TERM_LEN, TUSB_DESC_CS_INTERFACE, AUDIO20_CS_AC_INTERFACE_OUTPUT_TERMINAL, _termid, U16_TO_U8S_LE(_termtype), _assocTerm, _srcid, _clkid, U16_TO_U8S_LE(_ctrl), _stridx
 
 /* Feature Unit Descriptor(4.7.2.8) */
-// 1 - Channel
-#define TUD_AUDIO_DESC_FEATURE_UNIT_ONE_CHANNEL_LEN 6+(1+1)*4
-#define TUD_AUDIO_DESC_FEATURE_UNIT_ONE_CHANNEL(_unitid, _srcid, _ctrlch0master, _ctrlch1, _stridx) \
-  TUD_AUDIO_DESC_FEATURE_UNIT_ONE_CHANNEL_LEN, TUSB_DESC_CS_INTERFACE, AUDIO_CS_AC_INTERFACE_FEATURE_UNIT, _unitid, _srcid, U32_TO_U8S_LE(_ctrlch0master), U32_TO_U8S_LE(_ctrlch1), _stridx
-
-// 2 - Channels
-#define TUD_AUDIO_DESC_FEATURE_UNIT_TWO_CHANNEL_LEN (6+(2+1)*4)
-#define TUD_AUDIO_DESC_FEATURE_UNIT_TWO_CHANNEL(_unitid, _srcid, _ctrlch0master, _ctrlch1, _ctrlch2, _stridx) \
-		TUD_AUDIO_DESC_FEATURE_UNIT_TWO_CHANNEL_LEN, TUSB_DESC_CS_INTERFACE, AUDIO_CS_AC_INTERFACE_FEATURE_UNIT, _unitid, _srcid, U32_TO_U8S_LE(_ctrlch0master), U32_TO_U8S_LE(_ctrlch1), U32_TO_U8S_LE(_ctrlch2), _stridx
-// 4 - Channels
-#define TUD_AUDIO_DESC_FEATURE_UNIT_FOUR_CHANNEL_LEN (6+(4+1)*4)
-#define TUD_AUDIO_DESC_FEATURE_UNIT_FOUR_CHANNEL(_unitid, _srcid, _ctrlch0master, _ctrlch1, _ctrlch2, _ctrlch3, _ctrlch4, _stridx) \
-                    TUD_AUDIO_DESC_FEATURE_UNIT_FOUR_CHANNEL_LEN, TUSB_DESC_CS_INTERFACE, AUDIO_CS_AC_INTERFACE_FEATURE_UNIT, _unitid, _srcid, U32_TO_U8S_LE(_ctrlch0master), U32_TO_U8S_LE(_ctrlch1), U32_TO_U8S_LE(_ctrlch2), U32_TO_U8S_LE(_ctrlch3), U32_TO_U8S_LE(_ctrlch4), _stridx
-
-// For more channels, add definitions here
+#define TUD_AUDIO20_DESC_FEATURE_UNIT_LEN(_nchannels) (6 + ((_nchannels) + 1) * 4)
+#define TUD_AUDIO20_DESC_FEATURE_UNIT(_unitid, _srcid, _stridx, ...) \
+  TUD_AUDIO20_DESC_FEATURE_UNIT_LEN(TU_ARGS_NUM(__VA_ARGS__) - 1), TUSB_DESC_CS_INTERFACE, AUDIO20_CS_AC_INTERFACE_FEATURE_UNIT, _unitid, _srcid, TU_ARGS_APPLY_EXPAND(U32_TO_U8S_LE, __VA_ARGS__), _stridx
 
 /* Standard AC Interrupt Endpoint Descriptor(4.8.2.1) */
-#define TUD_AUDIO_DESC_STD_AC_INT_EP_LEN 7
-#define TUD_AUDIO_DESC_STD_AC_INT_EP(_ep, _interval) \
-  TUD_AUDIO_DESC_STD_AC_INT_EP_LEN, TUSB_DESC_ENDPOINT, _ep, TUSB_XFER_INTERRUPT, U16_TO_U8S_LE(6), _interval
+#define TUD_AUDIO20_DESC_STD_AC_INT_EP_LEN 7
+#define TUD_AUDIO20_DESC_STD_AC_INT_EP(_ep, _interval) \
+  TUD_AUDIO20_DESC_STD_AC_INT_EP_LEN, TUSB_DESC_ENDPOINT, _ep, TUSB_XFER_INTERRUPT, U16_TO_U8S_LE(6), _interval
 
 /* Standard AS Interface Descriptor(4.9.1) */
-#define TUD_AUDIO_DESC_STD_AS_INT_LEN 9
-#define TUD_AUDIO_DESC_STD_AS_INT(_itfnum, _altset, _nEPs, _stridx) \
-  TUD_AUDIO_DESC_STD_AS_INT_LEN, TUSB_DESC_INTERFACE, _itfnum, _altset, _nEPs, TUSB_CLASS_AUDIO, AUDIO_SUBCLASS_STREAMING, AUDIO_INT_PROTOCOL_CODE_V2, _stridx
+#define TUD_AUDIO20_DESC_STD_AS_LEN 9
+#define TUD_AUDIO20_DESC_STD_AS_INT(_itfnum, _altset, _nEPs, _stridx) \
+  TUD_AUDIO20_DESC_STD_AS_LEN, TUSB_DESC_INTERFACE, _itfnum, _altset, _nEPs, TUSB_CLASS_AUDIO, AUDIO_SUBCLASS_STREAMING, AUDIO_INT_PROTOCOL_CODE_V2, _stridx
 
 /* Class-Specific AS Interface Descriptor(4.9.2) */
-#define TUD_AUDIO_DESC_CS_AS_INT_LEN 16
-#define TUD_AUDIO_DESC_CS_AS_INT(_termid, _ctrl, _formattype, _formats, _nchannelsphysical, _channelcfg, _stridx) \
-  TUD_AUDIO_DESC_CS_AS_INT_LEN, TUSB_DESC_CS_INTERFACE, AUDIO_CS_AS_INTERFACE_AS_GENERAL, _termid, _ctrl, _formattype, U32_TO_U8S_LE(_formats), _nchannelsphysical, U32_TO_U8S_LE(_channelcfg), _stridx
+#define TUD_AUDIO20_DESC_CS_AS_INT_LEN 16
+#define TUD_AUDIO20_DESC_CS_AS_INT(_termid, _ctrl, _formattype, _formats, _nchannelsphysical, _channelcfg, _stridx) \
+  TUD_AUDIO20_DESC_CS_AS_INT_LEN, TUSB_DESC_CS_INTERFACE, AUDIO20_CS_AS_INTERFACE_AS_GENERAL, _termid, _ctrl, _formattype, U32_TO_U8S_LE(_formats), _nchannelsphysical, U32_TO_U8S_LE(_channelcfg), _stridx
 
 /* Type I Format Type Descriptor(2.3.1.6 - Audio Formats) */
-#define TUD_AUDIO_DESC_TYPE_I_FORMAT_LEN 6
-#define TUD_AUDIO_DESC_TYPE_I_FORMAT(_subslotsize, _bitresolution) /* _subslotsize is number of bytes per sample (i.e. subslot) and can be 1,2,3, or 4 */\
-  TUD_AUDIO_DESC_TYPE_I_FORMAT_LEN, TUSB_DESC_CS_INTERFACE, AUDIO_CS_AS_INTERFACE_FORMAT_TYPE, AUDIO_FORMAT_TYPE_I, _subslotsize, _bitresolution
+#define TUD_AUDIO20_DESC_TYPE_I_FORMAT_LEN 6
+#define TUD_AUDIO20_DESC_TYPE_I_FORMAT(_subslotsize, _bitresolution) /* _subslotsize is number of bytes per sample (i.e. subslot) and can be 1,2,3, or 4 */\
+  TUD_AUDIO20_DESC_TYPE_I_FORMAT_LEN, TUSB_DESC_CS_INTERFACE, AUDIO20_CS_AS_INTERFACE_FORMAT_TYPE, AUDIO20_FORMAT_TYPE_I, _subslotsize, _bitresolution
 
 /* Standard AS Isochronous Audio Data Endpoint Descriptor(4.10.1.1) */
-#define TUD_AUDIO_DESC_STD_AS_ISO_EP_LEN 7
-#define TUD_AUDIO_DESC_STD_AS_ISO_EP(_ep, _attr, _maxEPsize, _interval) \
-  TUD_AUDIO_DESC_STD_AS_ISO_EP_LEN, TUSB_DESC_ENDPOINT, _ep, _attr, U16_TO_U8S_LE(_maxEPsize), _interval
+#define TUD_AUDIO20_DESC_STD_AS_ISO_EP_LEN 7
+#define TUD_AUDIO20_DESC_STD_AS_ISO_EP(_ep, _attr, _maxEPsize, _interval) \
+  TUD_AUDIO20_DESC_STD_AS_ISO_EP_LEN, TUSB_DESC_ENDPOINT, _ep, _attr, U16_TO_U8S_LE(_maxEPsize), _interval
 
 /* Class-Specific AS Isochronous Audio Data Endpoint Descriptor(4.10.1.2) */
-#define TUD_AUDIO_DESC_CS_AS_ISO_EP_LEN 8
-#define TUD_AUDIO_DESC_CS_AS_ISO_EP(_attr, _ctrl, _lockdelayunit, _lockdelay) \
-  TUD_AUDIO_DESC_CS_AS_ISO_EP_LEN, TUSB_DESC_CS_ENDPOINT, AUDIO_CS_EP_SUBTYPE_GENERAL, _attr, _ctrl, _lockdelayunit, U16_TO_U8S_LE(_lockdelay)
+#define TUD_AUDIO20_DESC_CS_AS_ISO_EP_LEN 8
+#define TUD_AUDIO20_DESC_CS_AS_ISO_EP(_attr, _ctrl, _lockdelayunit, _lockdelay) \
+  TUD_AUDIO20_DESC_CS_AS_ISO_EP_LEN, TUSB_DESC_CS_ENDPOINT, AUDIO20_CS_EP_SUBTYPE_GENERAL, _attr, _ctrl, _lockdelayunit, U16_TO_U8S_LE(_lockdelay)
 
 /* Standard AS Isochronous Feedback Endpoint Descriptor(4.10.2.1) */
-#define TUD_AUDIO_DESC_STD_AS_ISO_FB_EP_LEN 7
-#define TUD_AUDIO_DESC_STD_AS_ISO_FB_EP(_ep, _epsize, _interval) \
-  TUD_AUDIO_DESC_STD_AS_ISO_FB_EP_LEN, TUSB_DESC_ENDPOINT, _ep, (uint8_t) ((uint8_t)TUSB_XFER_ISOCHRONOUS | (uint8_t)TUSB_ISO_EP_ATT_NO_SYNC | (uint8_t)TUSB_ISO_EP_ATT_EXPLICIT_FB), U16_TO_U8S_LE(_epsize), _interval
+#define TUD_AUDIO20_DESC_STD_AS_ISO_FB_EP_LEN 7
+#define TUD_AUDIO20_DESC_STD_AS_ISO_FB_EP(_ep, _epsize, _interval) \
+  TUD_AUDIO20_DESC_STD_AS_ISO_FB_EP_LEN, TUSB_DESC_ENDPOINT, _ep, (uint8_t) ((uint8_t)TUSB_XFER_ISOCHRONOUS | (uint8_t)TUSB_ISO_EP_ATT_NO_SYNC | (uint8_t)TUSB_ISO_EP_ATT_EXPLICIT_FB), U16_TO_U8S_LE(_epsize), _interval
 
 // AUDIO simple descriptor (UAC2) for 1 microphone input
 // - 1 Input Terminal, 1 Feature Unit (Mute and Volume Control), 1 Output Terminal, 1 Clock Source
 
-#define TUD_AUDIO_MIC_ONE_CH_DESC_LEN (TUD_AUDIO_DESC_IAD_LEN\
-  + TUD_AUDIO_DESC_STD_AC_LEN\
-  + TUD_AUDIO_DESC_CS_AC_LEN\
-  + TUD_AUDIO_DESC_CLK_SRC_LEN\
-  + TUD_AUDIO_DESC_INPUT_TERM_LEN\
-  + TUD_AUDIO_DESC_OUTPUT_TERM_LEN\
-  + TUD_AUDIO_DESC_FEATURE_UNIT_ONE_CHANNEL_LEN\
-  + TUD_AUDIO_DESC_STD_AS_INT_LEN\
-  + TUD_AUDIO_DESC_STD_AS_INT_LEN\
-  + TUD_AUDIO_DESC_CS_AS_INT_LEN\
-  + TUD_AUDIO_DESC_TYPE_I_FORMAT_LEN\
-  + TUD_AUDIO_DESC_STD_AS_ISO_EP_LEN\
-  + TUD_AUDIO_DESC_CS_AS_ISO_EP_LEN)
+#define TUD_AUDIO20_MIC_ONE_CH_DESC_LEN (TUD_AUDIO20_DESC_IAD_LEN\
+  + TUD_AUDIO20_DESC_STD_AC_LEN\
+  + TUD_AUDIO20_DESC_CS_AC_LEN\
+  + TUD_AUDIO20_DESC_CLK_SRC_LEN\
+  + TUD_AUDIO20_DESC_INPUT_TERM_LEN\
+  + TUD_AUDIO20_DESC_OUTPUT_TERM_LEN\
+  + TUD_AUDIO20_DESC_FEATURE_UNIT_LEN(1)\
+  + TUD_AUDIO20_DESC_STD_AS_LEN\
+  + TUD_AUDIO20_DESC_STD_AS_LEN\
+  + TUD_AUDIO20_DESC_CS_AS_INT_LEN\
+  + TUD_AUDIO20_DESC_TYPE_I_FORMAT_LEN\
+  + TUD_AUDIO20_DESC_STD_AS_ISO_EP_LEN\
+  + TUD_AUDIO20_DESC_CS_AS_ISO_EP_LEN)
 
-#define TUD_AUDIO_MIC_ONE_CH_DESC_N_AS_INT 1 	// Number of AS interfaces
+#define TUD_AUDIO20_MIC_ONE_CH_DESC_N_AS_INT 1 	// Number of AS interfaces
 
-#define TUD_AUDIO_MIC_ONE_CH_DESCRIPTOR(_itfnum, _stridx, _nBytesPerSample, _nBitsUsedPerSample, _epin, _epsize) \
+#define TUD_AUDIO20_MIC_ONE_CH_DESCRIPTOR(_itfnum, _stridx, _nBytesPerSample, _nBitsUsedPerSample, _epin, _epsize) \
   /* Standard Interface Association Descriptor (IAD) */\
-  TUD_AUDIO_DESC_IAD(/*_firstitf*/ _itfnum, /*_nitfs*/ 0x02, /*_stridx*/ 0x00),\
+  TUD_AUDIO20_DESC_IAD(/*_firstitf*/ _itfnum, /*_nitfs*/ 0x02, /*_stridx*/ 0x00),\
   /* Standard AC Interface Descriptor(4.7.1) */\
-  TUD_AUDIO_DESC_STD_AC(/*_itfnum*/ _itfnum, /*_nEPs*/ 0x00, /*_stridx*/ _stridx),\
+  TUD_AUDIO20_DESC_STD_AC(/*_itfnum*/ _itfnum, /*_nEPs*/ 0x00, /*_stridx*/ _stridx),\
   /* Class-Specific AC Interface Header Descriptor(4.7.2) */\
-  TUD_AUDIO_DESC_CS_AC(/*_bcdADC*/ 0x0200, /*_category*/ AUDIO_FUNC_MICROPHONE, /*_totallen*/ TUD_AUDIO_DESC_CLK_SRC_LEN+TUD_AUDIO_DESC_INPUT_TERM_LEN+TUD_AUDIO_DESC_OUTPUT_TERM_LEN+TUD_AUDIO_DESC_FEATURE_UNIT_ONE_CHANNEL_LEN, /*_ctrl*/ AUDIO_CS_AS_INTERFACE_CTRL_LATENCY_POS),\
+  TUD_AUDIO20_DESC_CS_AC(/*_bcdADC*/ 0x0200, /*_category*/ AUDIO20_FUNC_MICROPHONE, /*_totallen*/ TUD_AUDIO20_DESC_CLK_SRC_LEN+TUD_AUDIO20_DESC_INPUT_TERM_LEN+TUD_AUDIO20_DESC_OUTPUT_TERM_LEN+TUD_AUDIO20_DESC_FEATURE_UNIT_LEN(1), /*_ctrl*/ AUDIO20_CS_AS_INTERFACE_CTRL_LATENCY_POS),\
   /* Clock Source Descriptor(4.7.2.1) */\
-  TUD_AUDIO_DESC_CLK_SRC(/*_clkid*/ 0x04, /*_attr*/ AUDIO_CLOCK_SOURCE_ATT_INT_FIX_CLK, /*_ctrl*/ (AUDIO_CTRL_R << AUDIO_CLOCK_SOURCE_CTRL_CLK_FRQ_POS), /*_assocTerm*/ 0x01,  /*_stridx*/ 0x00),\
+  TUD_AUDIO20_DESC_CLK_SRC(/*_clkid*/ 0x04, /*_attr*/ AUDIO20_CLOCK_SOURCE_ATT_INT_FIX_CLK, /*_ctrl*/ (AUDIO20_CTRL_R << AUDIO20_CLOCK_SOURCE_CTRL_CLK_FRQ_POS), /*_assocTerm*/ 0x01,  /*_stridx*/ 0x00),\
   /* Input Terminal Descriptor(4.7.2.4) */\
-  TUD_AUDIO_DESC_INPUT_TERM(/*_termid*/ 0x01, /*_termtype*/ AUDIO_TERM_TYPE_IN_GENERIC_MIC, /*_assocTerm*/ 0x03, /*_clkid*/ 0x04, /*_nchannelslogical*/ 0x01, /*_channelcfg*/ AUDIO_CHANNEL_CONFIG_NON_PREDEFINED, /*_idxchannelnames*/ 0x00, /*_ctrl*/ AUDIO_CTRL_R << AUDIO_IN_TERM_CTRL_CONNECTOR_POS, /*_stridx*/ 0x00),\
+  TUD_AUDIO20_DESC_INPUT_TERM(/*_termid*/ 0x01, /*_termtype*/ AUDIO_TERM_TYPE_IN_GENERIC_MIC, /*_assocTerm*/ 0x03, /*_clkid*/ 0x04, /*_nchannelslogical*/ 0x01, /*_channelcfg*/ AUDIO20_CHANNEL_CONFIG_NON_PREDEFINED, /*_idxchannelnames*/ 0x00, /*_ctrl*/ AUDIO20_CTRL_R << AUDIO20_IN_TERM_CTRL_CONNECTOR_POS, /*_stridx*/ 0x00),\
   /* Output Terminal Descriptor(4.7.2.5) */\
-  TUD_AUDIO_DESC_OUTPUT_TERM(/*_termid*/ 0x03, /*_termtype*/ AUDIO_TERM_TYPE_USB_STREAMING, /*_assocTerm*/ 0x01, /*_srcid*/ 0x02, /*_clkid*/ 0x04, /*_ctrl*/ 0x0000, /*_stridx*/ 0x00),\
+  TUD_AUDIO20_DESC_OUTPUT_TERM(/*_termid*/ 0x03, /*_termtype*/ AUDIO_TERM_TYPE_USB_STREAMING, /*_assocTerm*/ 0x01, /*_srcid*/ 0x02, /*_clkid*/ 0x04, /*_ctrl*/ 0x0000, /*_stridx*/ 0x00),\
   /* Feature Unit Descriptor(4.7.2.8) */\
-  TUD_AUDIO_DESC_FEATURE_UNIT_ONE_CHANNEL(/*_unitid*/ 0x02, /*_srcid*/ 0x01, /*_ctrlch0master*/ AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_VOLUME_POS, /*_ctrlch1*/ AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_VOLUME_POS, /*_stridx*/ 0x00),\
+  TUD_AUDIO20_DESC_FEATURE_UNIT(/*_unitid*/ 0x02, /*_srcid*/ 0x01, /*_stridx*/ 0x00, /*_ctrlch0master*/ AUDIO20_CTRL_RW << AUDIO20_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO20_CTRL_RW << AUDIO20_FEATURE_UNIT_CTRL_VOLUME_POS, /*_ctrlch1*/ AUDIO20_CTRL_RW << AUDIO20_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO20_CTRL_RW << AUDIO20_FEATURE_UNIT_CTRL_VOLUME_POS),\
   /* Standard AS Interface Descriptor(4.9.1) */\
   /* Interface 1, Alternate 0 - default alternate setting with 0 bandwidth */\
-  TUD_AUDIO_DESC_STD_AS_INT(/*_itfnum*/ (uint8_t)((_itfnum)+1), /*_altset*/ 0x00, /*_nEPs*/ 0x00, /*_stridx*/ 0x00),\
+  TUD_AUDIO20_DESC_STD_AS_INT(/*_itfnum*/ (uint8_t)((_itfnum)+1), /*_altset*/ 0x00, /*_nEPs*/ 0x00, /*_stridx*/ 0x00),\
   /* Standard AS Interface Descriptor(4.9.1) */\
   /* Interface 1, Alternate 1 - alternate interface for data streaming */\
-  TUD_AUDIO_DESC_STD_AS_INT(/*_itfnum*/ (uint8_t)((_itfnum)+1), /*_altset*/ 0x01, /*_nEPs*/ 0x01, /*_stridx*/ 0x00),\
+  TUD_AUDIO20_DESC_STD_AS_INT(/*_itfnum*/ (uint8_t)((_itfnum)+1), /*_altset*/ 0x01, /*_nEPs*/ 0x01, /*_stridx*/ 0x00),\
   /* Class-Specific AS Interface Descriptor(4.9.2) */\
-  TUD_AUDIO_DESC_CS_AS_INT(/*_termid*/ 0x03, /*_ctrl*/ AUDIO_CTRL_NONE, /*_formattype*/ AUDIO_FORMAT_TYPE_I, /*_formats*/ AUDIO_DATA_FORMAT_TYPE_I_PCM, /*_nchannelsphysical*/ 0x01, /*_channelcfg*/ AUDIO_CHANNEL_CONFIG_NON_PREDEFINED, /*_stridx*/ 0x00),\
+  TUD_AUDIO20_DESC_CS_AS_INT(/*_termid*/ 0x03, /*_ctrl*/ AUDIO20_CTRL_NONE, /*_formattype*/ AUDIO20_FORMAT_TYPE_I, /*_formats*/ AUDIO20_DATA_FORMAT_TYPE_I_PCM, /*_nchannelsphysical*/ 0x01, /*_channelcfg*/ AUDIO20_CHANNEL_CONFIG_NON_PREDEFINED, /*_stridx*/ 0x00),\
   /* Type I Format Type Descriptor(2.3.1.6 - Audio Formats) */\
-  TUD_AUDIO_DESC_TYPE_I_FORMAT(_nBytesPerSample, _nBitsUsedPerSample),\
+  TUD_AUDIO20_DESC_TYPE_I_FORMAT(_nBytesPerSample, _nBitsUsedPerSample),\
   /* Standard AS Isochronous Audio Data Endpoint Descriptor(4.10.1.1) */\
-  TUD_AUDIO_DESC_STD_AS_ISO_EP(/*_ep*/ _epin, /*_attr*/ (uint8_t) ((uint8_t)TUSB_XFER_ISOCHRONOUS | (uint8_t)TUSB_ISO_EP_ATT_ASYNCHRONOUS | (uint8_t)TUSB_ISO_EP_ATT_DATA), /*_maxEPsize*/ _epsize, /*_interval*/ 0x01),\
+  TUD_AUDIO20_DESC_STD_AS_ISO_EP(/*_ep*/ _epin, /*_attr*/ (uint8_t) ((uint8_t)TUSB_XFER_ISOCHRONOUS | (uint8_t)TUSB_ISO_EP_ATT_ASYNCHRONOUS | (uint8_t)TUSB_ISO_EP_ATT_DATA), /*_maxEPsize*/ _epsize, /*_interval*/ 0x01),\
   /* Class-Specific AS Isochronous Audio Data Endpoint Descriptor(4.10.1.2) */\
-  TUD_AUDIO_DESC_CS_AS_ISO_EP(/*_attr*/ AUDIO_CS_AS_ISO_DATA_EP_ATT_NON_MAX_PACKETS_OK, /*_ctrl*/ AUDIO_CTRL_NONE, /*_lockdelayunit*/ AUDIO_CS_AS_ISO_DATA_EP_LOCK_DELAY_UNIT_UNDEFINED, /*_lockdelay*/ 0x0000)
+  TUD_AUDIO20_DESC_CS_AS_ISO_EP(/*_attr*/ AUDIO20_CS_AS_ISO_DATA_EP_ATT_NON_MAX_PACKETS_OK, /*_ctrl*/ AUDIO20_CTRL_NONE, /*_lockdelayunit*/ AUDIO20_CS_AS_ISO_DATA_EP_LOCK_DELAY_UNIT_UNDEFINED, /*_lockdelay*/ 0x0000)
 
 // AUDIO simple descriptor (UAC2) for 4 microphone input
 // - 1 Input Terminal, 1 Feature Unit (Mute and Volume Control), 1 Output Terminal, 1 Clock Source
 
-#define TUD_AUDIO_MIC_FOUR_CH_DESC_LEN (TUD_AUDIO_DESC_IAD_LEN\
-  + TUD_AUDIO_DESC_STD_AC_LEN\
-  + TUD_AUDIO_DESC_CS_AC_LEN\
-  + TUD_AUDIO_DESC_CLK_SRC_LEN\
-  + TUD_AUDIO_DESC_INPUT_TERM_LEN\
-  + TUD_AUDIO_DESC_OUTPUT_TERM_LEN\
-  + TUD_AUDIO_DESC_FEATURE_UNIT_FOUR_CHANNEL_LEN\
-  + TUD_AUDIO_DESC_STD_AS_INT_LEN\
-  + TUD_AUDIO_DESC_STD_AS_INT_LEN\
-  + TUD_AUDIO_DESC_CS_AS_INT_LEN\
-  + TUD_AUDIO_DESC_TYPE_I_FORMAT_LEN\
-  + TUD_AUDIO_DESC_STD_AS_ISO_EP_LEN\
-  + TUD_AUDIO_DESC_CS_AS_ISO_EP_LEN)
+#define TUD_AUDIO20_MIC_FOUR_CH_DESC_LEN (TUD_AUDIO20_DESC_IAD_LEN\
+  + TUD_AUDIO20_DESC_STD_AC_LEN\
+  + TUD_AUDIO20_DESC_CS_AC_LEN\
+  + TUD_AUDIO20_DESC_CLK_SRC_LEN\
+  + TUD_AUDIO20_DESC_INPUT_TERM_LEN\
+  + TUD_AUDIO20_DESC_OUTPUT_TERM_LEN\
+  + TUD_AUDIO20_DESC_FEATURE_UNIT_LEN(4)\
+  + TUD_AUDIO20_DESC_STD_AS_LEN\
+  + TUD_AUDIO20_DESC_STD_AS_LEN\
+  + TUD_AUDIO20_DESC_CS_AS_INT_LEN\
+  + TUD_AUDIO20_DESC_TYPE_I_FORMAT_LEN\
+  + TUD_AUDIO20_DESC_STD_AS_ISO_EP_LEN\
+  + TUD_AUDIO20_DESC_CS_AS_ISO_EP_LEN)
 
-#define TUD_AUDIO_MIC_FOUR_CH_DESC_N_AS_INT 1   // Number of AS interfaces
+#define TUD_AUDIO20_MIC_FOUR_CH_DESC_N_AS_INT 1   // Number of AS interfaces
 
-#define TUD_AUDIO_MIC_FOUR_CH_DESCRIPTOR(_itfnum, _stridx, _nBytesPerSample, _nBitsUsedPerSample, _epin, _epsize) \
+#define TUD_AUDIO20_MIC_FOUR_CH_DESCRIPTOR(_itfnum, _stridx, _nBytesPerSample, _nBitsUsedPerSample, _epin, _epsize) \
   /* Standard Interface Association Descriptor (IAD) */\
-  TUD_AUDIO_DESC_IAD(/*_firstitf*/ _itfnum, /*_nitfs*/ 0x02, /*_stridx*/ 0x00),\
+  TUD_AUDIO20_DESC_IAD(/*_firstitf*/ _itfnum, /*_nitfs*/ 0x02, /*_stridx*/ 0x00),\
   /* Standard AC Interface Descriptor(4.7.1) */\
-  TUD_AUDIO_DESC_STD_AC(/*_itfnum*/ _itfnum, /*_nEPs*/ 0x00, /*_stridx*/ _stridx),\
+  TUD_AUDIO20_DESC_STD_AC(/*_itfnum*/ _itfnum, /*_nEPs*/ 0x00, /*_stridx*/ _stridx),\
   /* Class-Specific AC Interface Header Descriptor(4.7.2) */\
-  TUD_AUDIO_DESC_CS_AC(/*_bcdADC*/ 0x0200, /*_category*/ AUDIO_FUNC_MICROPHONE, /*_totallen*/ TUD_AUDIO_DESC_CLK_SRC_LEN+TUD_AUDIO_DESC_INPUT_TERM_LEN+TUD_AUDIO_DESC_OUTPUT_TERM_LEN+TUD_AUDIO_DESC_FEATURE_UNIT_FOUR_CHANNEL_LEN, /*_ctrl*/ AUDIO_CS_AS_INTERFACE_CTRL_LATENCY_POS),\
+  TUD_AUDIO20_DESC_CS_AC(/*_bcdADC*/ 0x0200, /*_category*/ AUDIO20_FUNC_MICROPHONE, /*_totallen*/ TUD_AUDIO20_DESC_CLK_SRC_LEN+TUD_AUDIO20_DESC_INPUT_TERM_LEN+TUD_AUDIO20_DESC_OUTPUT_TERM_LEN+TUD_AUDIO20_DESC_FEATURE_UNIT_LEN(4), /*_ctrl*/ AUDIO20_CS_AS_INTERFACE_CTRL_LATENCY_POS),\
   /* Clock Source Descriptor(4.7.2.1) */\
-  TUD_AUDIO_DESC_CLK_SRC(/*_clkid*/ 0x04, /*_attr*/ AUDIO_CLOCK_SOURCE_ATT_INT_FIX_CLK, /*_ctrl*/ (AUDIO_CTRL_R << AUDIO_CLOCK_SOURCE_CTRL_CLK_FRQ_POS), /*_assocTerm*/ 0x01,  /*_stridx*/ 0x00),\
+  TUD_AUDIO20_DESC_CLK_SRC(/*_clkid*/ 0x04, /*_attr*/ AUDIO20_CLOCK_SOURCE_ATT_INT_FIX_CLK, /*_ctrl*/ (AUDIO20_CTRL_R << AUDIO20_CLOCK_SOURCE_CTRL_CLK_FRQ_POS), /*_assocTerm*/ 0x01,  /*_stridx*/ 0x00),\
   /* Input Terminal Descriptor(4.7.2.4) */\
-  TUD_AUDIO_DESC_INPUT_TERM(/*_termid*/ 0x01, /*_termtype*/ AUDIO_TERM_TYPE_IN_GENERIC_MIC, /*_assocTerm*/ 0x03, /*_clkid*/ 0x04, /*_nchannelslogical*/ 0x04, /*_channelcfg*/ AUDIO_CHANNEL_CONFIG_NON_PREDEFINED, /*_idxchannelnames*/ 0x00, /*_ctrl*/ AUDIO_CTRL_R << AUDIO_IN_TERM_CTRL_CONNECTOR_POS, /*_stridx*/ 0x00),\
+  TUD_AUDIO20_DESC_INPUT_TERM(/*_termid*/ 0x01, /*_termtype*/ AUDIO_TERM_TYPE_IN_GENERIC_MIC, /*_assocTerm*/ 0x03, /*_clkid*/ 0x04, /*_nchannelslogical*/ 0x04, /*_channelcfg*/ AUDIO20_CHANNEL_CONFIG_NON_PREDEFINED, /*_idxchannelnames*/ 0x00, /*_ctrl*/ AUDIO20_CTRL_R << AUDIO20_IN_TERM_CTRL_CONNECTOR_POS, /*_stridx*/ 0x00),\
   /* Output Terminal Descriptor(4.7.2.5) */\
-  TUD_AUDIO_DESC_OUTPUT_TERM(/*_termid*/ 0x03, /*_termtype*/ AUDIO_TERM_TYPE_USB_STREAMING, /*_assocTerm*/ 0x01, /*_srcid*/ 0x02, /*_clkid*/ 0x04, /*_ctrl*/ 0x0000, /*_stridx*/ 0x00),\
+  TUD_AUDIO20_DESC_OUTPUT_TERM(/*_termid*/ 0x03, /*_termtype*/ AUDIO_TERM_TYPE_USB_STREAMING, /*_assocTerm*/ 0x01, /*_srcid*/ 0x02, /*_clkid*/ 0x04, /*_ctrl*/ 0x0000, /*_stridx*/ 0x00),\
   /* Feature Unit Descriptor(4.7.2.8) */\
-  TUD_AUDIO_DESC_FEATURE_UNIT_FOUR_CHANNEL(/*_unitid*/ 0x02, /*_srcid*/ 0x01, /*_ctrlch0master*/ AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_VOLUME_POS, /*_ctrlch1*/ AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_VOLUME_POS, /*_ctrlch2*/ AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_VOLUME_POS, /*_ctrlch3*/ AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_VOLUME_POS, /*_ctrlch4*/ AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_VOLUME_POS, /*_stridx*/ 0x00),\
+  TUD_AUDIO20_DESC_FEATURE_UNIT(/*_unitid*/ 0x02, /*_srcid*/ 0x01, /*_stridx*/ 0x00, /*_ctrlch0master*/ AUDIO20_CTRL_RW << AUDIO20_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO20_CTRL_RW << AUDIO20_FEATURE_UNIT_CTRL_VOLUME_POS, /*_ctrlch1*/ AUDIO20_CTRL_RW << AUDIO20_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO20_CTRL_RW << AUDIO20_FEATURE_UNIT_CTRL_VOLUME_POS, /*_ctrlch2*/ AUDIO20_CTRL_RW << AUDIO20_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO20_CTRL_RW << AUDIO20_FEATURE_UNIT_CTRL_VOLUME_POS, /*_ctrlch3*/ AUDIO20_CTRL_RW << AUDIO20_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO20_CTRL_RW << AUDIO20_FEATURE_UNIT_CTRL_VOLUME_POS, /*_ctrlch4*/ AUDIO20_CTRL_RW << AUDIO20_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO20_CTRL_RW << AUDIO20_FEATURE_UNIT_CTRL_VOLUME_POS),\
   /* Standard AS Interface Descriptor(4.9.1) */\
   /* Interface 1, Alternate 0 - default alternate setting with 0 bandwidth */\
-  TUD_AUDIO_DESC_STD_AS_INT(/*_itfnum*/ (uint8_t)((_itfnum)+1), /*_altset*/ 0x00, /*_nEPs*/ 0x00, /*_stridx*/ 0x00),\
+  TUD_AUDIO20_DESC_STD_AS_INT(/*_itfnum*/ (uint8_t)((_itfnum)+1), /*_altset*/ 0x00, /*_nEPs*/ 0x00, /*_stridx*/ 0x00),\
   /* Standard AS Interface Descriptor(4.9.1) */\
   /* Interface 1, Alternate 1 - alternate interface for data streaming */\
-  TUD_AUDIO_DESC_STD_AS_INT(/*_itfnum*/ (uint8_t)((_itfnum)+1), /*_altset*/ 0x01, /*_nEPs*/ 0x01, /*_stridx*/ 0x00),\
+  TUD_AUDIO20_DESC_STD_AS_INT(/*_itfnum*/ (uint8_t)((_itfnum)+1), /*_altset*/ 0x01, /*_nEPs*/ 0x01, /*_stridx*/ 0x00),\
   /* Class-Specific AS Interface Descriptor(4.9.2) */\
-  TUD_AUDIO_DESC_CS_AS_INT(/*_termid*/ 0x03, /*_ctrl*/ AUDIO_CTRL_NONE, /*_formattype*/ AUDIO_FORMAT_TYPE_I, /*_formats*/ AUDIO_DATA_FORMAT_TYPE_I_PCM, /*_nchannelsphysical*/ 0x04, /*_channelcfg*/ AUDIO_CHANNEL_CONFIG_NON_PREDEFINED, /*_stridx*/ 0x00),\
+  TUD_AUDIO20_DESC_CS_AS_INT(/*_termid*/ 0x03, /*_ctrl*/ AUDIO20_CTRL_NONE, /*_formattype*/ AUDIO20_FORMAT_TYPE_I, /*_formats*/ AUDIO20_DATA_FORMAT_TYPE_I_PCM, /*_nchannelsphysical*/ 0x04, /*_channelcfg*/ AUDIO20_CHANNEL_CONFIG_NON_PREDEFINED, /*_stridx*/ 0x00),\
   /* Type I Format Type Descriptor(2.3.1.6 - Audio Formats) */\
-  TUD_AUDIO_DESC_TYPE_I_FORMAT(_nBytesPerSample, _nBitsUsedPerSample),\
+  TUD_AUDIO20_DESC_TYPE_I_FORMAT(_nBytesPerSample, _nBitsUsedPerSample),\
   /* Standard AS Isochronous Audio Data Endpoint Descriptor(4.10.1.1) */\
-  TUD_AUDIO_DESC_STD_AS_ISO_EP(/*_ep*/ _epin, /*_attr*/ (uint8_t) ((uint8_t)TUSB_XFER_ISOCHRONOUS | (uint8_t)TUSB_ISO_EP_ATT_ASYNCHRONOUS | (uint8_t)TUSB_ISO_EP_ATT_DATA), /*_maxEPsize*/ _epsize, /*_interval*/ 0x01),\
+  TUD_AUDIO20_DESC_STD_AS_ISO_EP(/*_ep*/ _epin, /*_attr*/ (uint8_t) ((uint8_t)TUSB_XFER_ISOCHRONOUS | (uint8_t)TUSB_ISO_EP_ATT_ASYNCHRONOUS | (uint8_t)TUSB_ISO_EP_ATT_DATA), /*_maxEPsize*/ _epsize, /*_interval*/ 0x01),\
   /* Class-Specific AS Isochronous Audio Data Endpoint Descriptor(4.10.1.2) */\
-  TUD_AUDIO_DESC_CS_AS_ISO_EP(/*_attr*/ AUDIO_CS_AS_ISO_DATA_EP_ATT_NON_MAX_PACKETS_OK, /*_ctrl*/ AUDIO_CTRL_NONE, /*_lockdelayunit*/ AUDIO_CS_AS_ISO_DATA_EP_LOCK_DELAY_UNIT_UNDEFINED, /*_lockdelay*/ 0x0000)
+  TUD_AUDIO20_DESC_CS_AS_ISO_EP(/*_attr*/ AUDIO20_CS_AS_ISO_DATA_EP_ATT_NON_MAX_PACKETS_OK, /*_ctrl*/ AUDIO20_CTRL_NONE, /*_lockdelayunit*/ AUDIO20_CS_AS_ISO_DATA_EP_LOCK_DELAY_UNIT_UNDEFINED, /*_lockdelay*/ 0x0000)
 
 // AUDIO simple descriptor (UAC2) for mono speaker
 // - 1 Input Terminal, 2 Feature Unit (Mute and Volume Control), 3 Output Terminal, 4 Clock Source
 
-#define TUD_AUDIO_SPEAKER_MONO_FB_DESC_LEN (TUD_AUDIO_DESC_IAD_LEN\
-  + TUD_AUDIO_DESC_STD_AC_LEN\
-  + TUD_AUDIO_DESC_CS_AC_LEN\
-  + TUD_AUDIO_DESC_CLK_SRC_LEN\
-  + TUD_AUDIO_DESC_INPUT_TERM_LEN\
-  + TUD_AUDIO_DESC_OUTPUT_TERM_LEN\
-  + TUD_AUDIO_DESC_FEATURE_UNIT_ONE_CHANNEL_LEN\
-  + TUD_AUDIO_DESC_STD_AS_INT_LEN\
-  + TUD_AUDIO_DESC_STD_AS_INT_LEN\
-  + TUD_AUDIO_DESC_CS_AS_INT_LEN\
-  + TUD_AUDIO_DESC_TYPE_I_FORMAT_LEN\
-  + TUD_AUDIO_DESC_STD_AS_ISO_EP_LEN\
-  + TUD_AUDIO_DESC_CS_AS_ISO_EP_LEN\
-  + TUD_AUDIO_DESC_STD_AS_ISO_FB_EP_LEN)
+#define TUD_AUDIO20_SPEAKER_MONO_FB_DESC_LEN (TUD_AUDIO20_DESC_IAD_LEN\
+  + TUD_AUDIO20_DESC_STD_AC_LEN\
+  + TUD_AUDIO20_DESC_CS_AC_LEN\
+  + TUD_AUDIO20_DESC_CLK_SRC_LEN\
+  + TUD_AUDIO20_DESC_INPUT_TERM_LEN\
+  + TUD_AUDIO20_DESC_OUTPUT_TERM_LEN\
+  + TUD_AUDIO20_DESC_FEATURE_UNIT_LEN(1)\
+  + TUD_AUDIO20_DESC_STD_AS_LEN\
+  + TUD_AUDIO20_DESC_STD_AS_LEN\
+  + TUD_AUDIO20_DESC_CS_AS_INT_LEN\
+  + TUD_AUDIO20_DESC_TYPE_I_FORMAT_LEN\
+  + TUD_AUDIO20_DESC_STD_AS_ISO_EP_LEN\
+  + TUD_AUDIO20_DESC_CS_AS_ISO_EP_LEN\
+  + TUD_AUDIO20_DESC_STD_AS_ISO_FB_EP_LEN)
 
-#define TUD_AUDIO_SPEAKER_MONO_FB_DESCRIPTOR(_itfnum, _stridx, _nBytesPerSample, _nBitsUsedPerSample, _epout, _epoutsize, _epfb, _epfbsize) \
+#define TUD_AUDIO20_SPEAKER_MONO_FB_DESCRIPTOR(_itfnum, _stridx, _nBytesPerSample, _nBitsUsedPerSample, _epout, _epoutsize, _epfb, _epfbsize) \
   /* Standard Interface Association Descriptor (IAD) */\
-  TUD_AUDIO_DESC_IAD(/*_firstitf*/ _itfnum, /*_nitfs*/ 0x02, /*_stridx*/ 0x00),\
+  TUD_AUDIO20_DESC_IAD(/*_firstitf*/ _itfnum, /*_nitfs*/ 0x02, /*_stridx*/ 0x00),\
   /* Standard AC Interface Descriptor(4.7.1) */\
-  TUD_AUDIO_DESC_STD_AC(/*_itfnum*/ _itfnum, /*_nEPs*/ 0x00, /*_stridx*/ _stridx),\
+  TUD_AUDIO20_DESC_STD_AC(/*_itfnum*/ _itfnum, /*_nEPs*/ 0x00, /*_stridx*/ _stridx),\
   /* Class-Specific AC Interface Header Descriptor(4.7.2) */\
-  TUD_AUDIO_DESC_CS_AC(/*_bcdADC*/ 0x0200, /*_category*/ AUDIO_FUNC_DESKTOP_SPEAKER, /*_totallen*/ TUD_AUDIO_DESC_CLK_SRC_LEN+TUD_AUDIO_DESC_INPUT_TERM_LEN+TUD_AUDIO_DESC_OUTPUT_TERM_LEN+TUD_AUDIO_DESC_FEATURE_UNIT_ONE_CHANNEL_LEN, /*_ctrl*/ AUDIO_CS_AS_INTERFACE_CTRL_LATENCY_POS),\
+  TUD_AUDIO20_DESC_CS_AC(/*_bcdADC*/ 0x0200, /*_category*/ AUDIO20_FUNC_DESKTOP_SPEAKER, /*_totallen*/ TUD_AUDIO20_DESC_CLK_SRC_LEN+TUD_AUDIO20_DESC_INPUT_TERM_LEN+TUD_AUDIO20_DESC_OUTPUT_TERM_LEN+TUD_AUDIO20_DESC_FEATURE_UNIT_LEN(1), /*_ctrl*/ AUDIO20_CS_AS_INTERFACE_CTRL_LATENCY_POS),\
   /* Clock Source Descriptor(4.7.2.1) */\
-  TUD_AUDIO_DESC_CLK_SRC(/*_clkid*/ 0x04, /*_attr*/ AUDIO_CLOCK_SOURCE_ATT_INT_FIX_CLK, /*_ctrl*/ (AUDIO_CTRL_R << AUDIO_CLOCK_SOURCE_CTRL_CLK_FRQ_POS), /*_assocTerm*/ 0x01,  /*_stridx*/ 0x00),\
+  TUD_AUDIO20_DESC_CLK_SRC(/*_clkid*/ 0x04, /*_attr*/ AUDIO20_CLOCK_SOURCE_ATT_INT_FIX_CLK, /*_ctrl*/ (AUDIO20_CTRL_R << AUDIO20_CLOCK_SOURCE_CTRL_CLK_FRQ_POS), /*_assocTerm*/ 0x01,  /*_stridx*/ 0x00),\
   /* Input Terminal Descriptor(4.7.2.4) */\
-  TUD_AUDIO_DESC_INPUT_TERM(/*_termid*/ 0x01, /*_termtype*/ AUDIO_TERM_TYPE_USB_STREAMING, /*_assocTerm*/ 0x00, /*_clkid*/ 0x04, /*_nchannelslogical*/ 0x01, /*_channelcfg*/ AUDIO_CHANNEL_CONFIG_NON_PREDEFINED, /*_idxchannelnames*/ 0x00, /*_ctrl*/ 0 * (AUDIO_CTRL_R << AUDIO_IN_TERM_CTRL_CONNECTOR_POS), /*_stridx*/ 0x00),\
+  TUD_AUDIO20_DESC_INPUT_TERM(/*_termid*/ 0x01, /*_termtype*/ AUDIO_TERM_TYPE_USB_STREAMING, /*_assocTerm*/ 0x00, /*_clkid*/ 0x04, /*_nchannelslogical*/ 0x01, /*_channelcfg*/ AUDIO20_CHANNEL_CONFIG_NON_PREDEFINED, /*_idxchannelnames*/ 0x00, /*_ctrl*/ 0 * (AUDIO20_CTRL_R << AUDIO20_IN_TERM_CTRL_CONNECTOR_POS), /*_stridx*/ 0x00),\
   /* Output Terminal Descriptor(4.7.2.5) */\
-  TUD_AUDIO_DESC_OUTPUT_TERM(/*_termid*/ 0x03, /*_termtype*/ AUDIO_TERM_TYPE_OUT_DESKTOP_SPEAKER, /*_assocTerm*/ 0x01, /*_srcid*/ 0x02, /*_clkid*/ 0x04, /*_ctrl*/ 0x0000, /*_stridx*/ 0x00),\
+  TUD_AUDIO20_DESC_OUTPUT_TERM(/*_termid*/ 0x03, /*_termtype*/ AUDIO_TERM_TYPE_OUT_DESKTOP_SPEAKER, /*_assocTerm*/ 0x01, /*_srcid*/ 0x02, /*_clkid*/ 0x04, /*_ctrl*/ 0x0000, /*_stridx*/ 0x00),\
   /* Feature Unit Descriptor(4.7.2.8) */\
-  TUD_AUDIO_DESC_FEATURE_UNIT_ONE_CHANNEL(/*_unitid*/ 0x02, /*_srcid*/ 0x01, /*_ctrlch0master*/ AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_VOLUME_POS, /*_ctrlch1*/ AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_VOLUME_POS, /*_stridx*/ 0x00),\
+  TUD_AUDIO20_DESC_FEATURE_UNIT(/*_unitid*/ 0x02, /*_srcid*/ 0x01, /*_stridx*/ 0x00, /*_ctrlch0master*/ AUDIO20_CTRL_RW << AUDIO20_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO20_CTRL_RW << AUDIO20_FEATURE_UNIT_CTRL_VOLUME_POS, /*_ctrlch1*/ AUDIO20_CTRL_RW << AUDIO20_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO20_CTRL_RW << AUDIO20_FEATURE_UNIT_CTRL_VOLUME_POS),\
   /* Standard AS Interface Descriptor(4.9.1) */\
   /* Interface 1, Alternate 0 - default alternate setting with 0 bandwidth */\
-  TUD_AUDIO_DESC_STD_AS_INT(/*_itfnum*/ (uint8_t)((_itfnum) + 1), /*_altset*/ 0x00, /*_nEPs*/ 0x00, /*_stridx*/ 0x00),\
+  TUD_AUDIO20_DESC_STD_AS_INT(/*_itfnum*/ (uint8_t)((_itfnum) + 1), /*_altset*/ 0x00, /*_nEPs*/ 0x00, /*_stridx*/ 0x00),\
   /* Standard AS Interface Descriptor(4.9.1) */\
   /* Interface 1, Alternate 1 - alternate interface for data streaming */\
-  TUD_AUDIO_DESC_STD_AS_INT(/*_itfnum*/ (uint8_t)((_itfnum) + 1), /*_altset*/ 0x01, /*_nEPs*/ 0x02, /*_stridx*/ 0x00),\
+  TUD_AUDIO20_DESC_STD_AS_INT(/*_itfnum*/ (uint8_t)((_itfnum) + 1), /*_altset*/ 0x01, /*_nEPs*/ 0x02, /*_stridx*/ 0x00),\
   /* Class-Specific AS Interface Descriptor(4.9.2) */\
-  TUD_AUDIO_DESC_CS_AS_INT(/*_termid*/ 0x01, /*_ctrl*/ AUDIO_CTRL_NONE, /*_formattype*/ AUDIO_FORMAT_TYPE_I, /*_formats*/ AUDIO_DATA_FORMAT_TYPE_I_PCM, /*_nchannelsphysical*/ 0x01, /*_channelcfg*/ AUDIO_CHANNEL_CONFIG_NON_PREDEFINED, /*_stridx*/ 0x00),\
+  TUD_AUDIO20_DESC_CS_AS_INT(/*_termid*/ 0x01, /*_ctrl*/ AUDIO20_CTRL_NONE, /*_formattype*/ AUDIO20_FORMAT_TYPE_I, /*_formats*/ AUDIO20_DATA_FORMAT_TYPE_I_PCM, /*_nchannelsphysical*/ 0x01, /*_channelcfg*/ AUDIO20_CHANNEL_CONFIG_NON_PREDEFINED, /*_stridx*/ 0x00),\
   /* Type I Format Type Descriptor(2.3.1.6 - Audio Formats) */\
-  TUD_AUDIO_DESC_TYPE_I_FORMAT(_nBytesPerSample, _nBitsUsedPerSample),\
+  TUD_AUDIO20_DESC_TYPE_I_FORMAT(_nBytesPerSample, _nBitsUsedPerSample),\
   /* Standard AS Isochronous Audio Data Endpoint Descriptor(4.10.1.1) */\
-  TUD_AUDIO_DESC_STD_AS_ISO_EP(/*_ep*/ _epout, /*_attr*/ (uint8_t) ((uint8_t)TUSB_XFER_ISOCHRONOUS | (uint8_t)TUSB_ISO_EP_ATT_ASYNCHRONOUS | (uint8_t)TUSB_ISO_EP_ATT_DATA), /*_maxEPsize*/ _epoutsize, /*_interval*/ 0x01),\
+  TUD_AUDIO20_DESC_STD_AS_ISO_EP(/*_ep*/ _epout, /*_attr*/ (uint8_t) ((uint8_t)TUSB_XFER_ISOCHRONOUS | (uint8_t)TUSB_ISO_EP_ATT_ASYNCHRONOUS | (uint8_t)TUSB_ISO_EP_ATT_DATA), /*_maxEPsize*/ _epoutsize, /*_interval*/ 0x01),\
   /* Class-Specific AS Isochronous Audio Data Endpoint Descriptor(4.10.1.2) */\
-  TUD_AUDIO_DESC_CS_AS_ISO_EP(/*_attr*/ AUDIO_CS_AS_ISO_DATA_EP_ATT_NON_MAX_PACKETS_OK, /*_ctrl*/ AUDIO_CTRL_NONE, /*_lockdelayunit*/ AUDIO_CS_AS_ISO_DATA_EP_LOCK_DELAY_UNIT_UNDEFINED, /*_lockdelay*/ 0x0000),\
+  TUD_AUDIO20_DESC_CS_AS_ISO_EP(/*_attr*/ AUDIO20_CS_AS_ISO_DATA_EP_ATT_NON_MAX_PACKETS_OK, /*_ctrl*/ AUDIO20_CTRL_NONE, /*_lockdelayunit*/ AUDIO20_CS_AS_ISO_DATA_EP_LOCK_DELAY_UNIT_UNDEFINED, /*_lockdelay*/ 0x0000),\
   /* Standard AS Isochronous Feedback Endpoint Descriptor(4.10.2.1) */\
-  TUD_AUDIO_DESC_STD_AS_ISO_FB_EP(/*_ep*/ _epfb, /*_epsize*/ _epfbsize, /*_interval*/ 1)
+  TUD_AUDIO20_DESC_STD_AS_ISO_FB_EP(/*_ep*/ _epfb, /*_epsize*/ _epfbsize, /*_interval*/ 1)
 
 //   Calculate wMaxPacketSize of Endpoints
-#define TUD_AUDIO_EP_SIZE(_maxFrequency, _nBytesPerSample, _nChannels) \
-    ((((_maxFrequency + (TUD_OPT_HIGH_SPEED ? 7999 : 999)) / (TUD_OPT_HIGH_SPEED ? 8000 : 1000)) + 1) * _nBytesPerSample * _nChannels)
+#define TUD_AUDIO_EP_SIZE(_is_highspeed, _maxFrequency, _nBytesPerSample, _nChannels) \
+    (((((_maxFrequency) + ((_is_highspeed) ? 7999 : 999)) / ((_is_highspeed) ? 8000 : 1000)) + 1) * (_nBytesPerSample) * (_nChannels))
 
 
 //--------------------------------------------------------------------+
@@ -697,44 +809,44 @@ bool tud_vendor_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_requ
 // Interface number, Alternate count, starting string index, attributes, detach timeout, transfer size
 // Note: Alternate count must be numeric or macro, string index is increased by one for each Alt interface
 #define TUD_DFU_DESCRIPTOR(_itfnum, _alt_count, _stridx, _attr, _timeout, _xfer_size) \
-  TU_XSTRCAT(_TUD_DFU_ALT_,_alt_count)(_itfnum, 0, _stridx), \
+  TU_XSTRCAT(TUD_DFU_ALT_,_alt_count)(_itfnum, 0, _stridx), \
   /* Function */ \
   9, DFU_DESC_FUNCTIONAL, _attr, U16_TO_U8S_LE(_timeout), U16_TO_U8S_LE(_xfer_size), U16_TO_U8S_LE(0x0101)
 
-#define _TUD_DFU_ALT(_itfnum, _alt, _stridx) \
+#define TUD_DFU_ALT(_itfnum, _alt, _stridx) \
   /* Interface */ \
   9, TUSB_DESC_INTERFACE, _itfnum, _alt, 0, TUD_DFU_APP_CLASS, TUD_DFU_APP_SUBCLASS, DFU_PROTOCOL_DFU, _stridx
 
-#define _TUD_DFU_ALT_1(_itfnum, _alt_count, _stridx) \
-  _TUD_DFU_ALT(_itfnum, _alt_count, _stridx)
+#define TUD_DFU_ALT_1(_itfnum, _alt_count, _stridx) \
+  TUD_DFU_ALT(_itfnum, _alt_count, _stridx)
 
-#define _TUD_DFU_ALT_2(_itfnum, _alt_count, _stridx) \
-  _TUD_DFU_ALT(_itfnum, _alt_count, _stridx),      \
-  _TUD_DFU_ALT_1(_itfnum, _alt_count+1, _stridx+1)
+#define TUD_DFU_ALT_2(_itfnum, _alt_count, _stridx) \
+  TUD_DFU_ALT(_itfnum, _alt_count, _stridx),      \
+  TUD_DFU_ALT_1(_itfnum, _alt_count+1, _stridx+1)
 
-#define _TUD_DFU_ALT_3(_itfnum, _alt_count, _stridx) \
-  _TUD_DFU_ALT(_itfnum, _alt_count, _stridx),      \
-  _TUD_DFU_ALT_2(_itfnum, _alt_count+1, _stridx+1)
+#define TUD_DFU_ALT_3(_itfnum, _alt_count, _stridx) \
+  TUD_DFU_ALT(_itfnum, _alt_count, _stridx),      \
+  TUD_DFU_ALT_2(_itfnum, _alt_count+1, _stridx+1)
 
-#define _TUD_DFU_ALT_4(_itfnum, _alt_count, _stridx) \
-  _TUD_DFU_ALT(_itfnum, _alt_count, _stridx),      \
-  _TUD_DFU_ALT_3(_itfnum, _alt_count+1, _stridx+1)
+#define TUD_DFU_ALT_4(_itfnum, _alt_count, _stridx) \
+  TUD_DFU_ALT(_itfnum, _alt_count, _stridx),      \
+  TUD_DFU_ALT_3(_itfnum, _alt_count+1, _stridx+1)
 
-#define _TUD_DFU_ALT_5(_itfnum, _alt_count, _stridx) \
-  _TUD_DFU_ALT(_itfnum, _alt_count, _stridx),      \
-  _TUD_DFU_ALT_4(_itfnum, _alt_count+1, _stridx+1)
+#define TUD_DFU_ALT_5(_itfnum, _alt_count, _stridx) \
+  TUD_DFU_ALT(_itfnum, _alt_count, _stridx),      \
+  TUD_DFU_ALT_4(_itfnum, _alt_count+1, _stridx+1)
 
-#define _TUD_DFU_ALT_6(_itfnum, _alt_count, _stridx) \
-  _TUD_DFU_ALT(_itfnum, _alt_count, _stridx),      \
-  _TUD_DFU_ALT_5(_itfnum, _alt_count+1, _stridx+1)
+#define TUD_DFU_ALT_6(_itfnum, _alt_count, _stridx) \
+  TUD_DFU_ALT(_itfnum, _alt_count, _stridx),      \
+  TUD_DFU_ALT_5(_itfnum, _alt_count+1, _stridx+1)
 
-#define _TUD_DFU_ALT_7(_itfnum, _alt_count, _stridx) \
-  _TUD_DFU_ALT(_itfnum, _alt_count, _stridx),      \
-  _TUD_DFU_ALT_6(_itfnum, _alt_count+1, _stridx+1)
+#define TUD_DFU_ALT_7(_itfnum, _alt_count, _stridx) \
+  TUD_DFU_ALT(_itfnum, _alt_count, _stridx),      \
+  TUD_DFU_ALT_6(_itfnum, _alt_count+1, _stridx+1)
 
-#define _TUD_DFU_ALT_8(_itfnum, _alt_count, _stridx) \
-  _TUD_DFU_ALT(_itfnum, _alt_count, _stridx),      \
-  _TUD_DFU_ALT_7(_itfnum, _alt_count+1, _stridx+1)
+#define TUD_DFU_ALT_8(_itfnum, _alt_count, _stridx) \
+  TUD_DFU_ALT(_itfnum, _alt_count, _stridx),      \
+  TUD_DFU_ALT_7(_itfnum, _alt_count+1, _stridx+1)
 
 //--------------------------------------------------------------------+
 // CDC-ECM Descriptor Templates
diff --git a/src/device/usbd_control.c b/src/device/usbd_control.c
index cee48d43c..745530f69 100644
--- a/src/device/usbd_control.c
+++ b/src/device/usbd_control.c
@@ -93,7 +93,7 @@ static bool data_stage_xact(uint8_t rhport) {
 
   if (_ctrl_xfer.request.bmRequestType_bit.direction == TUSB_DIR_IN) {
     ep_addr = EDPT_CTRL_IN;
-    if (xact_len) {
+    if (0u != xact_len) {
       TU_VERIFY(0 == tu_memcpy_s(_ctrl_epbuf.buf, CFG_TUD_EP0_BUFSIZE, _ctrl_xfer.buffer, xact_len));
     }
   }
@@ -159,7 +159,7 @@ bool usbd_control_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t result,
     // invoke optional dcd hook if available
     dcd_edpt0_status_complete(rhport, &_ctrl_xfer.request);
 
-    if (_ctrl_xfer.complete_cb) {
+    if (NULL != _ctrl_xfer.complete_cb) {
       // TODO refactor with usbd_driver_print_control_complete_name
       _ctrl_xfer.complete_cb(rhport, CONTROL_STAGE_ACK, &_ctrl_xfer.request);
     }
@@ -185,7 +185,7 @@ bool usbd_control_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t result,
 
     // invoke complete callback if set
     // callback can still stall control in status phase e.g out data does not make sense
-    if (_ctrl_xfer.complete_cb) {
+    if (NULL != _ctrl_xfer.complete_cb) {
       #if CFG_TUSB_DEBUG >= CFG_TUD_LOG_LEVEL
       usbd_driver_print_control_complete_name(_ctrl_xfer.complete_cb);
       #endif
diff --git a/src/device/usbd_pvt.h b/src/device/usbd_pvt.h
index a688cf497..6e220129a 100644
--- a/src/device/usbd_pvt.h
+++ b/src/device/usbd_pvt.h
@@ -117,20 +117,17 @@ bool usbd_edpt_iso_activate(uint8_t rhport,  tusb_desc_endpoint_t const * p_endp
 // Check if endpoint is ready (not busy and not stalled)
 TU_ATTR_ALWAYS_INLINE static inline
 bool usbd_edpt_ready(uint8_t rhport, uint8_t ep_addr) {
-  return !usbd_edpt_busy(rhport, ep_addr) && !usbd_edpt_stalled(rhport, ep_addr);
+  const bool is_busy = usbd_edpt_busy(rhport, ep_addr);
+  const bool is_stalled = usbd_edpt_stalled(rhport, ep_addr);
+  return !is_busy && !is_stalled;
 }
 
 // Enable SOF interrupt
 void usbd_sof_enable(uint8_t rhport, sof_consumer_t consumer, bool en);
 
-/*------------------------------------------------------------------*/
-/* Helper
- *------------------------------------------------------------------*/
-
 bool usbd_open_edpt_pair(uint8_t rhport, uint8_t const* p_desc, uint8_t ep_count, uint8_t xfer_type, uint8_t* ep_out, uint8_t* ep_in);
 void usbd_defer_func(osal_task_func_t func, void *param, bool in_isr);
 
-
 #if CFG_TUSB_DEBUG >= CFG_TUD_LOG_LEVEL
 void usbd_driver_print_control_complete_name(usbd_control_xfer_cb_t callback);
 #endif