Now I have another problem with the soundcard.
Passthrough in VLC works if I enable SPDIF. But I would like it to work in MPlayer (
http://www.mplayerhq.hu/ ). When I add "-afm hwac3" to the command line, all I get is choppy sound. The sound is just like the sound I get for half a second when the soundcard changes from PCM to AC3/DTS in a player where passthrough works.
Can you please try if you get any passthrough in MPlayer? If you have a xvid with ac3 sound...