Hi, I don't know if it will help you in your instance, but I have a desktop machine with a SoundBlaster Audigy Rx soundcard with 5.1 surround sound card and Logitech Z506 surround sound system.
I installed all ALSA packages except the ones for JACK and OSS plus qasMixer and two other qas packages via Synaptic Package Manager. I then install Audacious, open Audacious settings and change from PulseAudio to ALSA:
