Hello i was wondering if i could get some help, today i purchased samsung PN50C550 plasma picture great, im having sound issues.I have HD Satellite reciever(HDMI) and HD cable TV(HDMI) and XBOX 360(HDAVcomp) hooked up to it. I am unable to get any dolby audio on the HDSat reciever with dolby on(zero audio). Only with PCM selected i get sound with also changing the sat reciever to pcm also. same with xbox and HD cable box no dobly audio, can only get sound with pcm. Old TV i could get dolby audio. Any suggestions anyone can help? I am not using surround sound or a reciever on this setup.