Originally posted by: MeBeJedi
Would I be correct to assume that if the audio wasn't upmixed to 5.1 for the AC3 track that home theaters would decode the DD track as 2.0 (left and right only), whereas a stereo PCM track would be passed to the ProLogic decoder and be played as 4.0 (3/1.0)?
That is correct. The reasons I created this 5.1 track were 1) to see if I could do it
, and 2) my receiver doesn't have Pro-Logic II, so I figured I'd recreate the ProLogic decoding in software, and then save it as an AC3, which my receiver could decode (plus it makes the file smaller as well.) I, and many others, were pleased with the result. 
Would I be correct to assume that if the audio wasn't upmixed to 5.1 for the AC3 track that home theaters would decode the DD track as 2.0 (left and right only), whereas a stereo PCM track would be passed to the ProLogic decoder and be played as 4.0 (3/1.0)?
That is correct. The reasons I created this 5.1 track were 1) to see if I could do it
, and 2) my receiver doesn't have Pro-Logic II, so I figured I'd recreate the ProLogic decoding in software, and then save it as an AC3, which my receiver could decode (plus it makes the file smaller as well.) I, and many others, were pleased with the result. I thought how the amp decodes the incoming stereo signal (DD 2.0, PCM, analogue) depends on the amp itself, my Yamaha A/V receiver can take a 2.0 signal (analogue or digital) and output it through Pro-Logic, Pro-Logic II or any number of the DSP effects.