Sound control

[kas1e]

@Hans

There is still a need for a user mixer prefs program that can set the volume for all inputs/outputs in a manner that applications can't override/ignore; a kind of master volume for each input/output. That way the user can adjust volumes independently of each program, just like all other OSes have. If AHI doesn't have that ability, then this is something that could be added (via a separate interface, if needed).

Yep, and that ability should be closed and used by OS only, just to have one single mixer program which come with os by default. So no other apps can ever control master volume, but only that mixer. Probably even idea/gui/structure of the current mixer can be used, just all direct-poke code removed, and instead one single used when ahi will give that ability and os4 devs can use them.