05-05-2020, 08:40 AM
I'm not sure how ubports is handling it, but have a look for alsaucm sound profile settings. In pmos they're under /usr/share/alsa/ucm2/sun50i-a64-audio/ but this location is only writable by root and probably gets overwritten on package upgrades. I haven't tried using the alsaucm cli to change any of the values - if you're lucky it'll Just Work. Perhaps there's a nice GUI for it I'm not aware of.