what is the difference between SACD and DSD? - AVS Forum
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post #1 of 7 Old 12-02-2008, 07:33 PM - Thread Starter
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I was looking for a few Rolling Stones CD's on Amazon.com and I noticed there are regular CD's and then there are CD's that are DSD and then there is SACD.

SACD are imports and cost the most. I google DSD and SACD comes up?

Is DSD the same as SACD?
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post #2 of 7 Old 12-02-2008, 07:43 PM
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DSD is the recording system used for Super Audio CDs.

Check out:

http://en.wikipedia.org/wiki/Direct_Stream_Digital
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post #3 of 7 Old 12-02-2008, 07:43 PM
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SACD is in DSD format. CD's are consistently mis-labelled, and so are SACDs. Buyer beware, but if it's called SACD or DSD it should be what you want. Hybrid discs are often labeled either way or both ways. These are the ones that play in either type player.
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post #4 of 7 Old 12-02-2008, 10:26 PM
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Many SONY redbook CD releases were encoded in DSD. So it is not just reserved for SACD playback. The Stones CDs are a great example. The 2002 remastered redbook CDs were encoded using DSD. If you own any of the Stones SACDs, read the inside cover. It says both the SACD and CD layers benefit from DSD encoding. So, just because a Stones CD says "DSD" does NOT make it the SACD. In fact, it probably isn't.
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post #5 of 7 Old 12-02-2008, 11:00 PM
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Quote:
Originally Posted by bokes View Post

Is DSD the same as SACD?

Quote:
Originally Posted by rdgrimes View Post

SACD is in DSD format. CD's are consistently mis-labelled, and so are SACDs. Buyer beware, but if it's called SACD or DSD it should be what you want.

Quote:
Originally Posted by sivadselim View Post

Many SONY redbook CD releases were encoded in DSD. So it is not just reserved for SACD playback. The Stones CDs are a great example. The 2002 remastered redbook CDs were encoded using DSD. If you own any of the Stones SACDs, read the inside cover. It says both the SACD and CD layers benefit from DSD encoding. So, just because a Stones CD says "DSD" does NOT make it the SACD. In fact, it probably isn't.

DSD was the technology originally developed to archive master tapes and SACD was the format developed to deliver the native DSD bitstream to the consumer. Therefore, DSD and SACD are 2 different things. However, after a master tape has been archived/remastered with DSD, it can also be used to "down-convert" to regular CDs. The Rolling Stones catalog is a great example....the hybrid SACD that came in the digipaks were later reissued in regular CD jewel case as DSD-remastered CDs (The Rolling Stones' label mates at Abkco, such as Sam Cooke, the Animals, and the Herman's Hermits, also received similar reissue treatments). There're plenty of DSD-remastered CDs out there....the recent Elvis reissues, the Brian Eno reissues, many Sony Classical reissues, etc.
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post #6 of 7 Old 02-19-2014, 08:16 PM
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Thanks for the very usable info
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post #7 of 7 Old 02-19-2014, 11:01 PM
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Quote:
Originally Posted by ematcion View Post

However, after a master tape has been archived/remastered with DSD, it can also be used to "down-convert" to regular CDs.
Yup, downconversion to CD was specifically designed into DSD. Sony gave DSD a sampling rate exactly 64 times the sampling rate of CD, so it would divide evenly when downsampling to CD. 64 x 44.1 kHz = 2.8224 MHz (DSD sampling rate).

BTW, on multi-channel SACD titles, DSD is stored as using a lossless compression method called DST (just as PCM is stored on Blu-rays using lossless compression methods like TrueHD and DTS-HD MA).

Sanjay
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