I currently have a computer that I want to use as an HTPC and as a PC as well, splitting the hdmi signal through a 4x2 switch feeding my monitor in my office and the other hdmi signal going into my home theater room next door. The issue I am having is that I can't get sound through my receiver in the home theater room. Only in my office do I get sound. I tried messing with the sound card settings, which is capable of delivering 5.1 but it does not send 5.1 to my receiver, only stereo 2 channels when watching bluray movies. The speakers in my office work fine which is only 2 channels, just can't get my home theater sound to work right. Please help. Do I need to buy another sound card? Not sure how this works. I thought by having the hdmi switch, this would send the proper audio to my receiver but it doesn't work. I need to be able to switch between audio/video in my office and my home theater room from my PC. Thanks in advance.