S/PDIF vs. AES/EBU - Page 3 - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, 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 22nd September 2009, 06:29 AM   #21
diyAudio Member
 
jan.didden's Avatar
 
Join Date: May 2002
Location: Great City of Turnhout, Belgium
Blog Entries: 7
Quote:
Originally Posted by bordins View Post
This depends on how the DAC deals with imperfection of the signal or transmission-induced noise. If the DAC recovers the embedded clock of AES/EBU or S/PDIF, then it is highly likely that the reconstructed analog waveforms will be different, hence sonically discernable.
[snip]
Indeed. There was an AES paper by Hawksford and Dunn "Is the AES/EBU interface flawed" where they showed that if the DAC recovers the clock from the data, the jitter is even dependent from the bit pattern, meaning the jitter depends on the music!
That lead Benchmark Media to develop their 'zero jitter' DACs where you have a super clean local clok that runs on its own, and a large digital buffer. The digital stream fills the buffer and the DAC reads it out with its own super-clean clock. No jitter. No cable issues.
There are others that do the same, its just that I know the Benchmarks (have no affiliation with them) and their very affordable price. You typically find them in studio's for monitoring the recordings you are going to buy later

jd
__________________
I won't make the tactical error to try to dislodge with rational arguments a conviction that is beyond reason - Daniel Dennett
Check out Linear Audio Vol 7!
  Reply With Quote
Old 22nd September 2009, 08:22 AM   #22
diyAudio Member
 
Join Date: Aug 2008
ASRC dac like benchmark have jitter spectrum thats very pure. An ASRC is short FIFO buffer followed by interpolation . One previous post said that the jitter cross coupled thru the FIFO buffering some of those players had. Thats interesting. Maybe you need 2 FIFO .
  Reply With Quote
Old 23rd September 2009, 07:58 PM   #23
CosmoA is offline CosmoA  United States
Banned
 
Join Date: Aug 2009
Default SPDIF in pictures

The Benchmark DAC has a 50 ohm BNC connector (for a 75 ohm interface)followed by a couple of widely space wires connecting it to the PCB (high characteristic impedance)that also acts as a large loop area to pick up RF noise in the DAC. Stick a RCA to BNC adaptor in there for your favorite RCA connectored digital cable...

Gee I wonder why you can't here decent digital cable differences. Yes I'll bet they use resampling!

These people have the engineering talent to do better than this for the SPDIF interface, it is sad. This is pretty typical for ever high priced DACs.
Attached Images
File Type: jpg dac1-usb-rm_inside_small_001.jpg (48.7 KB, 195 views)
  Reply With Quote
Old 26th September 2009, 08:45 AM   #24
bordins is offline bordins  Thailand
diyAudio Member
 
Join Date: Feb 2005
Location: Bangkok
Quote:
Originally Posted by CosmoA View Post
followed by a couple of widely space wires connecting it to the PCB (high characteristic impedance)that also acts as a large loop area to pick up RF noise in the DAC.
I guess it is inside the metal enclousure of the DAC so it is considered "RF-safe". The RF inside would be relatively low, and the short cable distance can tolerate it. BTW, the torroid is much furthur away.
  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
SACD over S/PDIF Iain McNeill Digital Line Level 4 1st September 2008 05:27 AM
S/PDIF Questions ak_47_boy Digital Source 0 31st December 2007 01:41 AM
S/PDIF Optical to S/PDIF RCA Replacement PrecisionAudio Digital Source 2 11th February 2007 09:35 PM
S/pdif borges Digital Source 9 5th March 2005 12:22 AM
How should I go about running S/PDIF for 10m? jlanng Digital Source 3 28th November 2001 10:13 AM


New To Site? Need Help?

All times are GMT. The time now is 07:22 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