Detect sound card
From MEPIS Documentation Wiki
paste this command in a terminal:
lspci | grep -i audio
this will give you an output that tells you your card manufacturer and model.
you can then take that data and plug it into the Alsa Card Matrix
many of these drivers do not include the snd- prefix, you will need to add that to the module name
For using this method to detect and set up the sound card, see this page.