RE: Low-rez DSD conversion a common thing since the 1980's?

Digital Drive

Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it.

Posted by Thorsten (M) on August 10, 2016 at 18:11:27

In Reply to: Low-rez DSD conversion a common thing since the 1980's? posted by genungo on August 10, 2016 at 07:39:37:

Hi,

DSD was developed in part because in the 90's Delta Sigma ADC's (which output "DSD" naturally) and Delta Sigma DAC's (which need a "DSD" input) became common.

With CD the ADC had it's DSD output converted to PCM and the DAC received PCM and had to internally convert to DSD. So you had:

ADC-DS(S) -> Conversion to PCM -> CD -> Conversion to DS(D) -> DAC-DS(D)

You may find this little sidebar to an interview illuminating:

http://www.audiostream.com/content/qa-thorsten-loesch-amrifi-audiostream-addendum-pcm-vs-dsd

As to "Why no-one knows?"...

Well, those "PCM to DSD" converting DAC Chips did not have a big advertisment "Converts PCM to DSD", but instead were called "Mash" (pronounce Mush) by Technics, or "Bitstream" (pronounce Bitscream) by Philips, Pulseflow (pronounce Pulsesslow) by Sony and so on...

So while they actually did "PCM -> 2 -> DSD" in hardware, someone forgot to mention the fact (perhaps because DSD was still a decade away... Hehehe.

:-P
Thor

At 20 bits, you are on the verge of dynamic range covering fly-farts-at-20-feet to intolerable pain. Really, what more could we need?

This post is made possible by the generous support of people like you and our sponsors:

Follow Ups Full Thread

Topic - How Come No PCM to DSD Stand Alone CD Players Yet? - dusted 15:47:04 08/04/16 (12)

RE: How Come No PCM to DSD Stand Alone CD Players Yet? - Thorsten 20:00:14 08/08/16 (4)

RE: How Come No PCM to DSD Stand Alone CD Players Yet? - fantja 08:36:26 08/10/16 (0)

Low-rez DSD conversion a common thing since the 1980's? - genungo 07:39:37 08/10/16 (1)

RE: Low-rez DSD conversion a common thing since the 1980's? - Thorsten 18:11:27 08/10/16 (0)

RE: How Come No PCM to DSD Stand Alone CD Players Yet? - Tidycat1 21:01:17 08/09/16 (0)

all players in the Esoteric K range do that, I think. - eduardoo 03:12:12 08/07/16 (0)

RE: How Come No PCM to DSD Stand Alone CD Players Yet? - knewton 06:35:27 08/06/16 (0)

RE: How Come No PCM to DSD Stand Alone CD Players Yet? - fantja 06:03:31 08/06/16 (0)

RE: How Come No PCM to DSD Stand Alone CD Players Yet? - Sunya 21:31:35 08/04/16 (1)

RE: How Come No PCM to DSD Stand Alone CD Players Yet? - airheadair 21:06:40 08/05/16 (0)

dCS have been making them for the last 14 years - PAR 17:07:33 08/04/16 (1)

RE: dCS have been making them for the last 14 years - dusted 17:11:19 08/04/16 (0)

Follow Ups

RE: Low-rez DSD conversion a common thing since the 1980's? - Thorsten 18:11:27 08/10/16 (0)

Post a Message!