How to know which sound card is there
# lspci | grep Multimedia
How to know if it is working or not:
# cat /bin/ls > /dev/dsp
Did you hear a loud and terrible sound?
well, linux usually uses alsa to communicate with sound cards.
alsa configurator will search for the sound cards! choose it, usually the first one!
type "m" (mute on/off) for those vertical bars, "MM" means it is off, "OO" means it is on!
save all settings