My motherboard has an Optical Audio out so i thought if i plug the Optical Audio cable to my PC and than to my Surround sound Blue/DVD player that it would work but only the left and right speakers work out of the 5 and 1 subwoofer. I use my PS3 with my Samsung 5.1 and it works perfectly all 5 speakers and subwoofer woork liek a dream but i cant get my PC to work with it 🙁