Do i need to download drivers for this? I've checked off all the appropriate boxes in the sound setup but it still will not let me select a 5.1 setup. Its is optical out to my dd/dts/PLIIx reciever. Not sure why this is so diffucult. Im using an ASUS p5q-e motherboard.

No its connected via a Digital Optical cable into the back of the reciever. so theres only 1 cable and its connected. maybe i should try a different optical port on my reciever but i doubt that will work

Yea im using a toslink, finally got it to work 5.1 on power DVD had to configure it while the movie was playing. Still wont let me setup the speakers as 5.1 for the spdif settings in soundmax or in games tho. So frusterating, but at least its 5.1 for movies that was my big piss off

Yeah i suppose i could do that but then it would be on the pc end if i were to change it to decode at the pc. Its not an issue of it showing up at the reciever. It won't allow me to select 5.1 anywhere in the sound settings in vista. wont let me set it to 5.1 speakers in the control panel even after I checked off that the reciever does DTS processing. Im pretty sure its a driver or software issue but maybe ill have to contact asus by phone to get a better answer.

Usually seperate hdaudio cards will have the appropriate software. Im starting to regret buying a board with onboard hdaudio already. Might just have to buy a seperate card which is another hundred bux. Pretty stupid since i think its a vista issue not my board.