do you have a surround sound board? Does an onboard sound card do real surround? My 5.1 sound blaster has 6-7 jacks on it. front, rear, center, sub, mic, inout, line out I think. If you don't have all of them you can get a splitter from radio Shack. be sure you get the "Stereo" one other wise your going to just be spliting only one channel per out put.