I bought a JVC TH-m505 surround sound system and Im mostly going to use it for My Xbox and For the sound coming out of the tv.I have a Sanyo 30" HDTV and i currently have it hooked up using a DVI to HDMI cable. No matter what i do I cant figure out how to get the sound coming out of the speakers while i use the xbox and It wont work when I use the tv. I can only do one option. Im also using an optical cable to hook this up and if i have the optical cable going from the xbox to the tv, the sounds comes out of the speakers for the xbox, but if i put it back to cable on tv, the sounds doesnt come out. But if I put the optical cable from the Cable box to the TV the sound for the tv comes out of the speakers but the xbox sound now wont work with the speakers. If anyone knows how to hook this all up so I can have the sound for the xbox and TV work without having to switch the cables back and forth everytime id appreciate it. Any help would be greatly appreciated. Thank you