diff --git a/.gitignore b/.gitignore
index f2150a26fb..309d7466af 100644
--- a/.gitignore
+++ b/.gitignore
@@ -32,3 +32,5 @@ __pycache__
 cmake-build-*
 sdkconfig
 .PVS-Studio
+.vscode/
+build/
diff --git a/examples/device/CMakeLists.txt b/examples/device/CMakeLists.txt
index 6384407951..26a808a217 100644
--- a/examples/device/CMakeLists.txt
+++ b/examples/device/CMakeLists.txt
@@ -28,6 +28,7 @@ family_add_subdirectory(midi_test)
 family_add_subdirectory(msc_dual_lun)
 family_add_subdirectory(net_lwip_webserver)
 family_add_subdirectory(uac2_headset)
+family_add_subdirectory(uac2_speaker_fb)
 family_add_subdirectory(usbtmc)
 family_add_subdirectory(video_capture)
 family_add_subdirectory(video_capture_2ch)
diff --git a/examples/device/uac2_speaker_fb/CMakeLists.txt b/examples/device/uac2_speaker_fb/CMakeLists.txt
index e92a571488..f40ca87166 100644
--- a/examples/device/uac2_speaker_fb/CMakeLists.txt
+++ b/examples/device/uac2_speaker_fb/CMakeLists.txt
@@ -21,6 +21,7 @@ add_executable(${PROJECT})
 target_sources(${PROJECT} PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}/src/main.c
         ${CMAKE_CURRENT_SOURCE_DIR}/src/usb_descriptors.c
+        ${CMAKE_CURRENT_SOURCE_DIR}/src/quirk_os_guessing.c
         )
 
 # Example include
diff --git a/examples/device/uac2_speaker_fb/src/main.c b/examples/device/uac2_speaker_fb/src/main.c
index 53bbec9b60..ea5a2941d5 100644
--- a/examples/device/uac2_speaker_fb/src/main.c
+++ b/examples/device/uac2_speaker_fb/src/main.c
@@ -418,7 +418,7 @@ void audio_task(void)
   if ( start_ms == curr_ms ) return; // not enough time
   start_ms = curr_ms;
 
-  uint16_t length = current_sample_rate/1000 * CFG_TUD_AUDIO_FUNC_1_N_BYTES_PER_SAMPLE_RX * CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_RX;
+  uint16_t length = (uint16_t) (current_sample_rate/1000 * CFG_TUD_AUDIO_FUNC_1_N_BYTES_PER_SAMPLE_RX * CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_RX);
 
   if (current_sample_rate == 44100 && (curr_ms % 10 == 0))
   {
@@ -469,7 +469,7 @@ void audio_debug_task(void)
   debug_info.alt_settings   = current_alt_settings;
   debug_info.fifo_size      = CFG_TUD_AUDIO_FUNC_1_EP_OUT_SW_BUF_SZ;
   debug_info.fifo_count     = fifo_count;
-  debug_info.fifo_count_avg = fifo_count_avg >> 16;
+  debug_info.fifo_count_avg = (uint16_t) (fifo_count_avg >> 16);
   for (int i = 0; i < CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_RX + 1; i++)
   {
     debug_info.mute[i] = mute[i];
diff --git a/src/class/audio/audio_device.c b/src/class/audio/audio_device.c
index 8c86de4337..136f658df3 100644
--- a/src/class/audio/audio_device.c
+++ b/src/class/audio/audio_device.c
@@ -2066,8 +2066,8 @@ static bool audiod_set_interface(uint8_t rhport, tusb_control_request_t const *
             // Avoid 64bit division
             uint32_t nominal = ((fb_param.sample_freq / 100) << 16) / (frame_div / 100);
             audio->feedback.compute.fifo_count.nom_value = nominal;
-            audio->feedback.compute.fifo_count.rate_const[0] = (audio->feedback.max_value - nominal) / fifo_lvl_thr;
-            audio->feedback.compute.fifo_count.rate_const[1] = (nominal - audio->feedback.min_value) / fifo_lvl_thr;
+            audio->feedback.compute.fifo_count.rate_const[0] = (uint16_t) ((audio->feedback.max_value - nominal) / fifo_lvl_thr);
+            audio->feedback.compute.fifo_count.rate_const[1] = (uint16_t) ((nominal - audio->feedback.min_value) / fifo_lvl_thr);
             // On HS feedback is more sensitive since packet size can vary every MSOF, could cause instability
             if(tud_speed_get() == TUSB_SPEED_HIGH) {
               audio->feedback.compute.fifo_count.rate_const[0] /= 8;
@@ -2376,11 +2376,11 @@ static bool audiod_set_fb_params_freq(audiod_function_t* audio, uint32_t sample_
   if ((mclk_freq % sample_freq) == 0 && tu_is_power_of_two(mclk_freq / sample_freq))
   {
     audio->feedback.compute_method     = AUDIO_FEEDBACK_METHOD_FREQUENCY_POWER_OF_2;
-    audio->feedback.compute.power_of_2 = 16 - (audio->feedback.frame_shift - 1) - tu_log2(mclk_freq / sample_freq);
+    audio->feedback.compute.power_of_2 = (uint8_t) (16 - (audio->feedback.frame_shift - 1) - tu_log2(mclk_freq / sample_freq));
   }
   else if ( audio->feedback.compute_method == AUDIO_FEEDBACK_METHOD_FREQUENCY_FLOAT)
   {
-    audio->feedback.compute.float_const = (float)sample_freq / mclk_freq * (1UL << (16 - (audio->feedback.frame_shift - 1)));
+    audio->feedback.compute.float_const = (float)sample_freq / (float) mclk_freq * (1UL << (16 - (audio->feedback.frame_shift - 1)));
   }
   else
   {