You have to have xine installed to watch DVDs, and you have to have the gstreamer-plugins package installed at least for mp3's
as root:
This should show you what (if any) sound modules you have installed. I think SB Audigy uses the emu10k1 driver (snd_emu10k1), but I've been known to be wrong before.
If you don't see anything,
look for the device ID next to your card in the output (something like 00:09.0 or some such) then do:
replace the 00:09.0 with the cards real ID. If that doesn't tell you anything useful, just do 'dmesg' by itself and see if anything is reported on your card.
If you don't see any problems with dmesg (it loaded the card OK), check to see if you have a /proc/asound/cardN (where N is a number, like card0 or card1). If you do have this directory, do:
Make sure that the ALSA card ID matches your cardN directory name (the ALSA id is the digit to the far left of the line that list your card). If this does match, make sure the right ID is in /etc/asound.conf.
Stepping back a moment, if you don't see anything listed in /proc/asound for cards (/proc/asound/cards says --- no soundcards --- or you don't have a /proc/asound/cardN directory), chances are you've got conflicting IRQs, try moving the card to a different slot in the machine. Of course, you could just try this step first and if it fixes your problem you won't have to go through any of the above
If none of this helps you, just post back.
Windows and Linux running on the same machine won't fight for the card because when one is up the other isn't.
http://www.disabo.com