@naquaada
I have a 5.1 sound system connected via 3 jacks (using the 3 slots on the back of the motherboard). in windows, this would allow the sound to split properly to the different channels. what happens in my zeph's rev 2 case is that I get sound through the front left and right speakers properly, and a veeeery faint sound (almost like my imagination's own sound! )from the other speakers (including subwoofer). Also, this happens nomatter the choice in the MIDI preference pane of enabling 2, 4 or 6 channels. What I have to do is to keep me with 2ch, because if I select 6 ch, occasionally my sound disappears (I read somewhere it had to do with a channel rotation, somehow). So I got stereo just fine, but I'm keeping myself from watching a good DVD with surround . Oh, and I can use the media buttons to change the volume just fine!