I am trying to use Arduino Leonardo for presenting itself as an USB audio device - but without actual audio playback/record functionality. The reason why I’m doing this is to make sure that windows will properly detect composite USB device that consist of audio and other transfer channels.
So I created a simply audio topology that consist of one microphone (which is 2-channel) - I was able to upload it to Arduino and run it without bricking. The USBLyzer shows that audio descriptors were transmitted but in the device manager I can see that device cannot be run due to error code 10.
From I have seen in the USB capture it seems that USB GET_DESCRIPTOR is being sent for the audio and nothing else for the audio (I would expect requests for the USB string descriptors to be sent) - which makes me think that host for some reason doesn’t accept audio topology. The CDC channel seem to be handled correctly.
Could anyone help me understand what I’m doing wrong? I am attaching USB descriptors.
arduino_usb_audio_topology.txt (7.58 KB)