Originally Posted by AlphaWolf_HK
Just as an example, manufacturers are allowed to make blu-ray players that don't support dolby truehd at all, and content producers are allowed to make discs that don't include truehd tracks. HD-DVD on the other hand, all discs are required to have a truehd soundtrack, and all device manufacturers are required to include truehd playback support.
It's not mandatory for discs to have a True HD soundtrack. I've got plenty that only have DD, DD+ and/or DTS.
player has to support decoding of True HD. Hell, even the 360 will decode it, but it converts it to either DD or DTS before it gets output to the receiver.