SACD over S/PDIF - diyAudio
Go Back   Home > Forums > Source & Line > Digital Line Level

Digital Line Level DACs, Digital Crossovers, Equalizers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 30th August 2008, 09:55 PM   #1
diyAudio Moderator Emeritus
 
Iain McNeill's Avatar
 
Join Date: Oct 2007
Location: Santa Cruz, California
Default SACD over S/PDIF

Having difficulty tracking down information on this so was wondering if anyone had researched already.

With this interest in A/B/X testing of SACD vs CD I was thinking a suitable switching box could be made using a CS8416 S/PDIF receiver in software mode. But then I got to thinking the DSD audio from SACD is not compatible with S/PDIF format. What actually comes out of a S/PDIF when you play an SACD? Is it just the 16/44.1 CD layer?

I did find this device:
https://www.dvdupgrades.ch/product/M...x_c/24308.html
which implies that there is also copy protection issue with SACD over S/PDIF.

Anyone know the inside scoop?
  Reply With Quote
Old 31st August 2008, 01:24 PM   #2
diyAudio Member
 
whitelabrat's Avatar
 
Join Date: Dec 2006
Location: Maryland
If you find a SACD player that does output via S/PDIF please let us all know! I don't think there is such an animal out there. I've tried to find one. Really. The closest thing is the link you provide which is a tool for intercepting the PCM stream after the SACD decoder.

The folks over at 2L have some raw DSD files that you can download and experiment with which is interesting. I converted a DXD master to a 24bit/192khz FLAC and then compared the output to 16/44 on a Emu 1212M soundcard. I can tell the difference with good headphones.

It wouldn't be difficult to convert a DSD stream to something like FLAC, but I don't know of any why to fetch the DSD stream off of a SACD. You have to hand it to SONY for creating an effective copy protection, but that is also the reason I've just about given up on the format. I can't use the 1212m with my mediocre SACD player. As a result I find that a cd on a good DAC is better than a ho-hum SACD player.
  Reply With Quote
Old 31st August 2008, 05:41 PM   #3
diyAudio Member
 
Join Date: Nov 2005
Location: HK
I am using Denon DVD-2930. There is a source direct option in the menu. If I enable the source direct the DSD signal go to the DAC directly. If I disable the source direct the DSD translates to PCM with the internal processor. The sampling rate is about 24/176K so you can use a SPDIF transmitter such as SRC4392, DIT4192 transmits to DAC.

See this thread, Upgrade Denon DVD-2930


Do you accept this idea? Or you may use your own transmitter transmits the DSD signal directly.
  Reply With Quote
Old 31st August 2008, 06:38 PM   #4
diyAudio Moderator Emeritus
 
Iain McNeill's Avatar
 
Join Date: Oct 2007
Location: Santa Cruz, California
whitelabrat:

Great link to some quality recordings - thanks, I'll enjoy those.

I need to learn more about DSD and the conversion to PCM. It seems that this could be a problematic transform that introduces errors & noise.

psycoman:
Interesting project. This is the same approach of intercepting the data on its way to the DAC and processing for S/PDIF, right?
In your linked thread you say you sample rate convert. Can you explain why you need to SRC? Why not just output straight to S/PDIF?
  Reply With Quote
Old 1st September 2008, 05:27 AM   #5
diyAudio Member
 
Join Date: Nov 2005
Location: HK
I send out the raw PCM to the balanced SPDIF port. The SRC does the up-sampling for the internal DSD1794.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
S/PDIF Optical to S/PDIF RCA Replacement PrecisionAudio Digital Source 2 11th February 2007 09:35 PM
Please help dcx2496 + S/PDIF george a Digital Line Level 22 10th May 2005 09:10 PM
S/pdif borges Digital Source 9 5th March 2005 12:22 AM
S/PDIF volume Prune Digital Source 1 17th February 2004 03:46 AM
ac3 via s/pdif input airjohn Digital Source 0 14th January 2003 09:57 AM


New To Site? Need Help?

All times are GMT. The time now is 12:09 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2