Bluetooth samples: Add USB Audio to Broadcast Sink sample

samples/bluetooth/broadcast_audio_sink/Kconfig

@@ -43,4 +43,25 @@ config ENABLE_LC3
  select LIBLC3
  select FPU
 
+config USE_USB_AUDIO_OUTPUT
+ bool "Use USB Audio as output"
+ depends on ENABLE_LC3
+ select USB_DEVICE_STACK
+ select USB_DEVICE_AUDIO
+ select RING_BUFFER
+ help
+ Enables USB audio as output as a USB peripheral. This does not support providing USB
+ audio to e.g. speakers that are also USB peripherals, but can be connected to e.g. a
+ phone or PC as a USB-in device (such as a USB microphone).
+ USB audio only supports a single audio channel.
+
+config TARGET_BROADCAST_CHANNEL
+ int "Broadcast Channel Audio Location to sync to"
+ range 0 2
+ default 1
+ depends on USE_USB_AUDIO_OUTPUT
+ help
+ Channel Audio Location to sync to. These corresponds to the bt_audio_location,
+ supporting mono, left and right channels
+
 source "Kconfig.zephyr"

samples/bluetooth/broadcast_audio_sink/boards/nrf5340_audio_dk_nrf5340_cpuapp.conf

@@ -1,3 +1,7 @@
 # The LC3 codec uses a large amount of stack. This app runs the codec in the work-queue, hence
 # inctease stack size for that thread.
 CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=4096
+CONFIG_ENABLE_LC3=y
+CONFIG_TARGET_BROADCAST_CHANNEL=1
+CONFIG_USE_USB_AUDIO_OUTPUT=y
+CONFIG_USB_DEVICE_PRODUCT="USB Broadcast Sink"