I've been (slowly) encoding with Handbrake my DVD collection, and have carefully chosen audio track 1 to be an AAC 2 channel mixdown of the AC3 5.1, and have a second audio track to be the raw AC3 5.1 stream. Now that I've done that, how can I access that 'true dolby digital' stream? Can AppleTV do it? Can my Mac Mini do it? How about an xBox I'm streaming via Connect 360? Other options? Obviously whatever is doing the decoding needs to have a digital output to a receiver or preamp that can handle the AC3/Dolby Digital signal; but how do I get my device to recognize and select and pass through that signal to my receiver?