I have recently installed the newest (12/22) edge version of pmOS and the mic is no longer working on phone calls. Calls were working fine for roughly the last year. I am wondering what has changed. It would be nice to know how megi's new kernel has changed the audio routing. My audio does not sound like a freight train. It is simply quiet. Sounds like this is different from what is being described by mikehenson.
edit: My ADC Capture Volume is set to 160 in /usr/share/alsa/ucm2/PinePhonePro/VoiceCall.conf.
edit: My ADC Capture Volume is set to 160 in /usr/share/alsa/ucm2/PinePhonePro/VoiceCall.conf.