Quote:
Originally Posted by Quoth
|
Yes, because audio CDs have less error correction than CD-ROM. Not no error correction.
Quote:
Also "written" rather than pressed CDs can deteriorate faster, that's why there was/is archival quality versions.
I have many 30 year old approx "written" CD Audio, CD-Data and Bureau Photo CD discs. Some of the Audio CDs are now audibly "damaged". The CD-data and photo CD are all fine.
|
Because consumer CD-R media uses an organic dye which will deteriorate when exposed to oxygen. Your data discs are not "fine"; they're just working longer because CD-R has more robust error correction than CD-DA. I'm afraid your burned audio discs likely are unrecoverable if you don't have the original, commercially pressed discs around.
Quote:
1:1 copies are not assured with CD-Audio, but it's a lot better than CD Audio > minidisc > CD Audio. Only wav or similar files on CD-ROM are better.
You might often get 1:1 with CD Audio. The fact you always have doesn't mean it's always true.
|
It's true that any single user with a single drive is likely going to have problems getting perfect rips every time. Get a large enough collection of people, drives, and duplicate discs together and you absolutely can get consistent, perfect rips. That's what the AccurateRip database is: 500K users, 5000 unique drives, and 5 million unique discs cataloged.
Quote:
Originally Posted by j.p.s
According to wikipedia, CIRC as implemented on CD corrects burst errors of up to 4000 bits. (The spatial interleaving avoids the need for an impossible number of parity bits. The wikipedia article is very weak on detail.)
|
I had forgotten just how wide CIRC on CD-DA would work. I did remember that single bit errors were easily corrected, which got stuck in my head. It's still not as robust as the layers of error correction on CD-ROM.