Sycraft
100+ Head-Fier
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Quote:
Except that's what DTS is. DTS is just encoded in a PCM stream. If you feed a DTS signal in to a non DTS decoder, you get static (same with Dolby Digital). It's a valid PCM stream, just not audio data. That's how DTS CDs work. You encode a DTS file at CD rate, which is slightly different form DVD full rate (full rate DVD is 1.536mb/s half rate is 768kb/s which is by far the most common) at 1.234mb/s. It is then just output as PCM form the CD player to the reciever. The reciver recognises it as valid DTS (if it knows aobut DTS that is) and decodes it.
So if you get DTS out digitally form a card, that's an unmodified PCM stream right there. Any modification, including resampling, would hose the signal.
However, I think DVD DTS is output at 48kHz, which is what the full rate is different, and I think the cards know to not use their DSPs when it's a DTS signal they are passing.
Originally Posted by AdamWill maybe I should rephrase and say that with the correct configuration you should be able to pass through DTS / DD correctly on _anything_ with a digital output: being able to do this does not imply that you are able to pass through a raw PCM stream at the correct sampling rate, that's not the same kettle of fish at all. |
Except that's what DTS is. DTS is just encoded in a PCM stream. If you feed a DTS signal in to a non DTS decoder, you get static (same with Dolby Digital). It's a valid PCM stream, just not audio data. That's how DTS CDs work. You encode a DTS file at CD rate, which is slightly different form DVD full rate (full rate DVD is 1.536mb/s half rate is 768kb/s which is by far the most common) at 1.234mb/s. It is then just output as PCM form the CD player to the reciever. The reciver recognises it as valid DTS (if it knows aobut DTS that is) and decodes it.
So if you get DTS out digitally form a card, that's an unmodified PCM stream right there. Any modification, including resampling, would hose the signal.
However, I think DVD DTS is output at 48kHz, which is what the full rate is different, and I think the cards know to not use their DSPs when it's a DTS signal they are passing.