I was considering purchasing a 5.1 surround system for my PC. Something I would like to do would be to route 5.1 audio from my Xbox 360 into these speakers. While I'm aware some speakers have optical inputs, these are a bit out of my price range. I was curious if there was a way to convert the digital 5.1 audio from an Xbox to the analog PC output in real time. I believe that some sound cards can only do recording (not real time), so I would want to avoid these. Please let me know if you have any experience with this!