I'm a novice when it comes to types of audio input. I have a DirecTV/Tivo receiver. When watching a channel, such as HBO that is broadcasting a DD 5.1, I get the appropriate display on the Outlaw. Sometimes when the program is shown to be in Surround Sound, I get BOTH the DD 5.1 and ProLogic display. Other times when a surround sound program is on, I get the ProLogic display only after I have manually changed to the Surround mode. Assuming I haven't confused you all, can anyone explain why I am getting both the 5.1/ProLogic display on some programs.