I have this Onkyo 7.1 receiver. I want to hook my PC up to my Plasma using HDMI. It's hooked up fine now. How can I get sound from my PC to my Onkyo? I have a Sound Blaster Audigy 2 ZS in my PC and there is a SPDIF output. I'm guessing the best thing to do here is get a cable for the SPDIF output, and plug it into the Digital input on my Onkyo. I just cant figure out which cable to get. Any ideas? If I could somehow keep 7.1 sound that would be best.