I just tried the onboard player with alsamixer running - no connection between the 2? Touch uses lipc com.lab126.audio to control all audio stuff:
"lipc-probe com.lab126.audio" shows it all. I suppose this could even be added to a program directly using this method:
https://www.mobileread.com/forums/sho...d.php?t=195185
Anyway, it is just interesting to see what goes on.