Mono audio conversion.

[maxi1134]

I currently use up to 12 speakers at once, in 6 different rooms.

When doing so I like to set those speakers to "mono" within their wiim configuration. (To avoid sound weirdnesses when pacing around)

This is cumbersome as I need to revert to Stereo before using the Wiim for one-room audio.

A function where we can set a Group, or a speaker, to "mono" would be great, although I don't know how hard it would be to remux the live stream to mono from stereo.