08-13-2020, 12:27 PM
You probably need to go digging through the PulseAudio and alsa docs to see if there's anything you can do as a workaround until this is supported. PulseAudio profiles use alsa UCM profiles if they exist. For the PinePhone the packaged ones are in /usr/share/alsa/ucm2/PinePhone/ so if you edit them your changes will most likely be overwritten by any package update. There's a cli tool called alsaucm that can manipulate these, but I don't know how/whether it lets you change the volumes set in the EnableSequence sections, and how/whether these changes would be persistent.