I have a 7.1 sound card and ony 5.1 speakers, meaning iv got an extra 2 channels not being used. I use a program called Teamspeak (uses voip) wen playing games, and was wondering if I could somehow direct teh ts to come out of headphones connected to the 2 extra channels. any ideas? also i have another older sound card, is it possible to use 2 sound cards?