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In Reply to: Re: scratched discs posted by John Elison on May 2, 2007 at 17:12:48:
my friend had some CDs that either played but had problems or didn't play at all in his CDP.he found many errors on the discs when using EAC. consequently, he made new CDRs that were confirmed to be error-free.
the CDRs now either played or (for the ones that had played with problems) played and sounded better.
i'm not trying to start a digital vs vinyl debate, or a 'when are bits better than other bits' discussion... or even whether MoFi gold CDRs are better than generic ones...
i'm simply saying that taking all the time one needs to create a disc/file that is error free had an audible impact (not debatable -- as there were cases where it was sound vs no sound at all/gaps). the hypothesis is that the removal of the CDP's need to use error-correction was the sole factor in this.
no need to scratch up your own CDs. in fact, these were some commercial CDs that my friend had purchased with no visible damage at all....that still wouldn't be read by his CDP.
one possibility: his CDP was at-fault, and somehow the copies were more compatible with his player. the offending CDPs either played with errors (or not at all) on my ML-9600, though.
Follow Ups:
Certainly I am not trying to start a good bits versus bad bits debate either. The fact is, audible or not, error correction in a CDP does affect the sound theoretically (always) and practically (sometimes). Some CDP are better correcting errors than others. Some TT setup plays scratched LPs better than others (or makes scratch more tolerable). The only thing I can conclude is that comparing CD versus LP is a crapshot at best unless playback equipment can be somehow certified for this kind of comparison, and the test CD and LP are made from the identical master.
Theo
...in my posts i was making a comparison of an error-laden commercial CD vs. one where that same CD was copied to CDR but the errors were fixed.
To be clear here for myself..Scratches can create unrecoverable errors on cd's. Now, you can make a copy of a cd that has lower error rate or corrected errors from the orignal but I thought according to the Cross Interleave Reed Solomon coding, there is no such thing has an "error-free" cd, just lower or higher error rates. The low rates are easily corrected by the player, and when the error rate is high, well, it's not so easy.
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