Hello,
I've been trying to setup upmixing stereo to 5.1 on Acer XC-603G for a quite while time, but i cannot seem to get it to work. It is a sound card with 5.1 support, but with only 3 ports.
Previously i tired to setup mopidy+ubuntu18.04 and stumbled upon the same issue - no matter what I twaked, in pulseaudio or alsa, made it work.
