RE: DSD means One bit.

Posted by Isaak J. Garvey (P) on March 30, 2016 at 10:15:17

In Reply to: DSD means One bit. posted by Tony Lauck on March 29, 2016 at 12:14:31:

Many DSD DAC manufacturers, including MyTek, floated the notion of Multi Bit DSD.

Michael, from Mytek:

"1) Multibit DSD is not PCM.

PCM is typically 24 bit of the whole sample value while multi bit DSD is typically 5-6 bits of DIFFERENCE between adjacent samples. In 1 bit DSD this difference is binary(0 or 1) while in multi bit DSD it's the same difference between samples but quantized with 5-6 bits (Sabre has a 6 bit DAC). Multibit DSD is BETTER than 1 bit DSD, so there is nothing wrong with going 1 bit> 6bit which is what all these DAC chips do.

2) The " purity of 1 bit " is a marketing spin resulting from how DSD was marketed by Sony, but it's not 1 bit that makes it sound good, but it's nature. What makes DSD sound good is the conversion method (differential btwn samples- not the actual sample) and no digital filters , it's simply cleaner. 1 bit DAC conversion has the appeal of simplicity (perfect linearity theoretically) in the early 2000s. We are now well past that with performance requirement. We need more bits to resolve detail better.

3) All PCM conversion today (99% of ADCs) is a derivative of multi bit DSD.
PCM is always a subset of that, so naturally it can only have less information, not more.

In our latest experiments PCM has to have at least 32 bit to compete with DSD low level resolution and 352kFS to compete with lightness of DSD.

In the experiments with our newest prototype ADC, when we reduce wordlength of ADC from 32 to 24 bit, signal deteriorates."

http://www.computeraudiophile.com/f6-dac-digital-analog-conv (Open in New Window)

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Follow Ups Full Thread

Topic - DAC's Which Convert PCM to DSD - Mikey8811 23:50:56 03/14/16 (28)

RE: DAC's Which Convert PCM to DSD - ephemere 22:04:04 03/20/16 (0)

RE: DAC's Which Convert PCM to DSD - Thorsten 07:32:21 03/20/16 (0)

RE: DAC's Which Convert PCM to DSD - DLS 15:23:12 03/17/16 (0)

Tascam DA-3000? - genungo 03:57:34 03/16/16 (5)

RE: Tascam DA-3000? - John Elison 21:43:56 03/16/16 (4)

RE: Tascam DA-3000? - beppe61 15:26:09 03/21/16 (2)

RE: Tascam DA-3000? - John Elison 16:01:49 03/21/16 (1)

RE: Tascam DA-3000? - beppe61 00:27:22 03/22/16 (0)

RE: Tascam DA-3000? - genungo 07:54:35 03/17/16 (0)

PS Audio released a 2nd Directstream DAC - bullethead 01:59:22 03/16/16 (7)

RE: PS Audio released a 2nd Directstream DAC - John Elison 21:46:10 03/16/16 (5)

RE: PS Audio released a 2nd Directstream DAC - bullethead 16:21:22 03/17/16 (0)

Well it isn't Ted Smith, but - E-Stat 06:11:47 03/17/16 (3)

Check the interview I replied to John with, that has Ted Smith (nt) - bullethead 12:29:16 03/20/16 (2)

Thanks - E-Stat 12:59:21 03/20/16 (1)

RE: Thanks - bullethead 13:22:40 03/20/16 (0)

Not just DSD, 10X DSD! nt - oldmkvi 16:59:47 03/16/16 (0)

Better done in software than hardware. - PaulN 21:46:08 03/15/16 (2)

Reddddeeeeeeee NO !!! -t - Sordidman 09:50:49 03/21/16 (0)

RE: Better done in software than hardware. - Mikey8811 22:41:37 03/15/16 (0)

RE: DAC's Which Convert PCM to DSD - PAR 08:11:39 03/15/16 (0)

HQ Player and JRiver MC 21 do that for any DSD Dac. - oldmkvi 06:42:01 03/15/16 (4)

DSD means One bit. - Tony Lauck 12:14:31 03/29/16 (3)

RE: DSD means One bit. - Isaak J. Garvey 10:15:17 03/30/16 (2)

RE: DSD means One bit. - Tony Lauck 12:51:31 03/30/16 (1)

RE: DSD means One bit. - Isaak J. Garvey 17:33:10 03/30/16 (0)

RE: DAC's Which Convert PCM to DSD - Paul Wilson 05:41:26 03/15/16 (1)

RE: DAC's Which Convert PCM to DSD - Bill_k 06:22:09 03/15/16 (0)

Follow Ups

RE: DSD means One bit. - Isaak J. Garvey 10:15:17 03/30/16 (2)

RE: DSD means One bit. - Tony Lauck 12:51:31 03/30/16 (1)

RE: DSD means One bit. - Isaak J. Garvey 17:33:10 03/30/16 (0)

RE: DSD means One bit.

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