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In Reply to: RE: Is there valid evidence of this? (NT) posted by Kal Rubinson on June 08, 2015 at 15:38:43
Redbook CD's have dropouts. When the missing data is too extensive for the error correction circuitry to interpolate, the sound is muted.
I have yet to notice an audible dropout on the few SACD's I have, but I can't imagine the more densely packed SACD information to be immune from errors.
-reub
Follow Ups:
I think that introducing talk of error correction in the playback source is out of scope.
The question of variances in a disk, aren't answered by "it doesn't matter" because of error correction.
All transports are not created equal, or made equal by error correction. And the VRDs-NEO demonstrates this.
"Asylums with doors open wide,
Where people had paid to see inside,
For entertainment they watch his body twist
Behind his eyes he says, 'I still exist.'"
"Redbook CD's have dropouts. When the missing data is too extensive for the error correction circuitry to interpolate, the sound is muted."
If you rip CDs to hard drive using EAC, dBpoweramp, or other secure ripper you will find that nearly all the disks rip bit perfectly unless they have been badly scratched or otherwise treated poorly. Most of uncorrectable errors are successfully hidden by the error concealment feature which makes it difficult to hear an error even if you know exactly where it is and are looking for it. However, playing Redbook CDs in real time the error correction circuitry may create a lot of electronic noise and that may degrade the audio playback quality, thereby accounting for different sound.
I would expect similar results with SACD playback, although I haven't investigated this. Unfortunately, the ripping solution does not apply to SACDs because of the DRM which is difficult to circumvent (and doing so is illegal in many jurisdictions).
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
I can see that if you've hit your 1,000,000th pressing, something might be wearing down, but with these 'low serial number premiums' we're not talking very many units, is all.
I've been here since the beginning and I've seen some crazy stuff posted, so anything's possible, I guess?
Chris
But is there any statistical correlation between dropouts and order of production?
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