I am trying to figure out how to get 5.1 audio from my HDTV broadcasts. I currently have digital cable service from Time Warner in Charlotte and have no issues with the video feed. The HDTV tuner is a Scientific Atlanta 3100. I have a Sony str-da30es receiver. The tuner has one coaxial audio output and the receiver has one coax audio input. I have made this connection but when I tune to a HD broadcast I 5.1 audio. The receiver does not seem to acknowlegde the digital audio input like it does when receiving audio from the dvd player. There was a thread that I read related to this issue but I am unable to find it now. Any ideas?