Axus Xonar DGX SoundCard
From wikinotes
Setup
Enabling Digital Audio
After connecting the PCI card to the computer, and turning it on, confirm that the card is visible to the kernel using
lspci | grep -i oxygen hd audio aplay -l | grep -i xonar dgx
alsamixer F6 # choose XDG Audio card Analog Output # MultiChannel S/PDIF # press M to unmute
WARNING:
Any audio that is already playing will likely be set to the motherboard sound until reboot, or manually changing the stream's output (see the tool pavucontrol-qt)
Setting Default Card/Sink
If the above was not sufficient, then you'll likely need to manually choose the default card.
Determine the default output (has a * next to name)
pacmd list-cards | grep -e 'name:' -e 'index' -e 'alsa.card_name' -e 'active port' pacmd list-sinks | grep -e 'name:' -e 'index' -e 'alsa.card_name' -e 'active port'* index: 1 name: <alsa_output.pci-0000_00_1f.3.analog-stereo> alsa.card_name = "HDA Intel PCH" active port: <analog-output-speaker> index: 4 name: <alsa_output.pci-0000_05_04.0.analog-stereo> alsa.card_name = "Xonar DGX" active port: <analog-output-headphones> # optical, headphones jack, line out, ...Set the default card
pacmd set-default-card 0 # choose the default card pacmd set-default-sink 0 # choose the default sinkSoftware Volume Control for Optical Output
See step 2: