Audio Source forwards Android microphone audio input to the PulseAudio daemon through ADB, so you can use your Android device as a USB microphone.


Requirements:

Device with at least Android 4.0 (API level 14), but fully tested only on Android 10 (API level 29) so your mileage may vary.
GNU/Linux machine with:
Android SDK Platform Tools (requires adb in PATH).
PulseAudio (requires pactl in PATH).
Socat (requires socat in PATH).
For further details, see the project's documentation.