voip

Summa

Context
Some devices only have mono-output at which point our positional audio feature can't work as it will require at least two channels to simulate any spatial effects.

Describe the feature you have in mind
A warning for anyone that has positional audio enabled but is using a mono device

Describe alternatives you've considered
None

Additional context
See e.g. #5220

For classes declared with struct, forward declarations should also use struct. Currently, only struct Message violates this in a few header files (2 or so?).