Hey, Bill, I want to personally thank you for this tip. I have been using the optical connection and have wondered why I was only getting two-channel sound. As soon as I switched to "Audio System" I started receiving 5.1 audio. This was not an intuitive setting, and (shame on me) I rarely read the User's Manual.
Jerry, are you able to get 5.1 on Hulu as well?
I get it on my local channels, and Netflix, but hulu just comes through as Stereo...