Originally Posted by k elone
Are you saying that if you have an older reciever, and you do not have any HDMI connections all Doldy TrueHD tracks will be down converte to Dolby Digital tracks?
I recall reading that if you attempt to decode the Dolby TrueHD and DTS Master tracks with a reciever that does not have ability to do so, you may damage your speakers.
Well, a receiver incapable of decoding these should communicate that fact to the player via HDMI/EDID, and should never receive them. I recall something about not playing DTS CDs or something like that in my receiver manual. I forget what it was, and it's unrelated to high bit rate audio such as TrueHD.
I also recall reading that if your reciever does not have the ability decode these tracks and the blu-ray disk does not include a basic dolby digital or DTS track, you can only get stereo?
What's the deal?
Blu-ray discs with TrueHD tracks should contain a companion Digital track which is used when necessary. Supposedly, this is dictated by some standard, but I have never seen it. I have personally tried out a disc with TrueHD, and I got DD, so I believe it.
DTS is a bit more clever. DTS allows for extensions, which can be ignored by devices not supporting them. DTS-HD Master Audio tracks are playable with standard DTS decoders via the presence of the DTS Core - the lossless extension is simply ignored (there's a paper online explaining this in technical detail, but I hope you get the gist.)
In summary, it should just work. Not only that, but the lossy soundtracks on Blu-ray discs are arguably almost as good as the lossy tracks. Dolby Digital is present at a higher rate on Blu-ray discs which can provide for better sound than on DVD while still using the stock DD decoder. DTS is a very high rate (up to 1.5 Mbs) codec. Some claim DTS is already so close to lossless, that most people would be hard pressed to tell high rate DTS from the original.