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What is the sound of a degraded CD-R? - 5/12/2004 2:32:54 PM   
markl

 

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Hi,
I understand that over time, even the best CD-Rs such as my Taiyo Yudens (which are rated allegedly for a 100 year life) will degrade, and that 100 year ratings are "optimistic" at best. I also understand that as a new medium, no one *really* knows how long CD-Rs will last and that only time will really tell.

Still, speaking as an anal-retentive audiophile who now has a lot of music stored on this potentially fragile medium, I'm worried, and I want to understand how I will recognize if/when my CD-Rs are beginning to degrade. Will it be the case that one day, my CD player simply won't be able to read them at all, or will it be some sort of gradual degradation, where individual bits of sound are lost slowly but surely, leading to a disc that can still be played back, but with less and resolution, less and less bits of information, and less and less fidelity? Or is there increased jitter, increased errors, or what?

In other words, what does an aging, degrading CD-R sound like? Thanks in advance.
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RE: What is the sound of a degraded CD-R? - 5/12/2004 4:32:31 PM   
emperor


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As far i understand, time will eventually lead to higher error rate, increased jitter and of course physical problems, the so called "aging problems", the media could be eventually destroyed

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[Deleted] - 5/12/2004 5:16:19 PM   
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RE: What is the sound of a degraded CD-R? - 5/12/2004 6:24:49 PM   
emperor


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Minos, yes you are correct, perhaps he can give us more details about this, while searching around the net found several side effects:

* How Permanent is CD-R Media?
"...All dyes, but cyanine dyes in particular, change in three ways during aging. First, contrast between the pits and lands changes: this has influence on the reflectivity, which in turn causes interpretation problems. Second, the shapes of pits and lands become smaller and longer causing higher jitter. Third, bleeding of the dye from neighboring grooves causes higher crosstalk..."

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RE: What is the sound of a degraded CD-R? - 5/12/2004 8:04:49 PM   
Cal 01


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I have 4.5 GB of music stored on Verbatim DataLifePlus CDR and CD/RW disc and have been stored for about two (2) or three (3) years now -- I know that's not a long time either. I haven't had a problem so far in those music files being degraded! BTW, I've heard of an application that claims to stop this degrading process, and you can check it out here to see it, it's called "ByteGuardian:" http://www.macecraft.com/


< Message edited by Cal 01 -- 5/12/2004 9:34:17 PM >


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clawso1

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RE: What is the sound of a degraded CD-R? - 5/13/2004 7:45:00 AM   
Tony Veglis


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The lonegevity is strongy related to the storage conditions. Keep your discs away from dust, high temperatures and humidity. This way you avoid surface damages and dye / reflector weathering.

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