Raspberry Pi 3
Ubuntu MATE 1.20.1 / Ubuntu 18.04.2
I am attempting to use the 3.5mm audio jack for stereo playback but the playback device only ever shows up as mono.
Simple mixer control 'PCM',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback -10239 - 400
Mono: Playback -2563 [72%] [-25.63dB] [on]
speaker-text -c2 only plays audio in the "left" phase of the test (but it is played in the center, i.e. both channels).
Audio controls within MATE only show mono also, so I don't think the problem is limited to ALSA, but I only need ALSA audio.
Other posts ( https://www.raspberrypi.org/forums/view ... hp?t=18755
) indicate that while the ALSA controls only adjust the volume in mono, playback should be in stereo. I have not found this to be the case.