I cannot get full surround sound audio with live or recorded TV in 7 MC. Sound is only heard over the front speakers. I have a 5.1 setup connected via HDMI (Radeon 4650-->Yamaha 5.1 HDMI receiver-->Panasonic Plasma). When I play the same file in Media Player I do get the full surround effect. I also receive full surround with WMVHD in Media Center so the problem is with how Media Center is handling AC3 audio. When I go to speaker setup in Media Center and select 5.1 all five chimes are heard but only over the front speakers, usually 2 in one front speaker and 3 in the other. The Windows audio setup works perfectly and I hear tones in all speakers so it is only a problem with Media Center. Any ideas? Is there anyway to troubleshoot these problems outside of the MC interface? Would it help to do the Media Center setup again?