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+---- Thread: Audio over USB (/showthread.php?tid=12691)
Audio over USB - 3x5co - 01-02-2021
I wouldn't have thought this was possible, but the other day I was playing my PinePhone over Bluetooth, and whenever I plugged the USB into that audio adapter, the bluetooth would cut out. When I turned off bluetooth and just played my music, then plugged in the USB, I would get a burst of noise and then silence. It seemed like it was trying to send audio over USB.
Now I have my phone connected to my computer, and I'm wondering how to send audio to my desktop. If I can get SSH over USB working again, I could probably send it this way over CLI. That's a little complicated, though — especially if there's a more direct method.
RE: Audio over USB - wibble - 01-05-2021
Have a look for any documentation you can find on gadget audio - much as you can make the phone look like a network device to the PC, you can also make it look like an audio adapter. I've not tried it on the PinePhone but it works on a Pi Zero and Pi 4. I think the PinePhone distros are using the compound gadget interface, configured through sysfs somewhere.
It might be easier to do it over the network connection with PulseAudio:
https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/Network/