Hello!
I’m running MusicBox 0.6 on a Raspberry Pi B+ combined with the Hifiberry AMP+ and I’d like to use Airplay with mono audio. I’m building the Raspberry into a vintage radio which only has one speaker so I can use only one channel. Is there a way to downmix both channels into one? I’d really appreciate some help!
Setting output=capsfilter caps=audio/x-raw-int,channels=1 ! alsasink in the [audio] config section should do the trick. I’m not quite sure how the channels get mixed together though.
That’s the solution for Mopidy… Now we just need the solution for Airplay 
Looks like the solution is described here: https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=33431
Haven’t tried it myself though…
Looks like none of the solutions work with the Hifiberry, I can’t get audio out of it when I change the settings.ini. 