Joe Kesselman wrote:
Laurence Payne wrote:
So you maintain ripping a CD is just a synonym for playing it?

"Any sufficiently precise playback is indistinguishable from copying."
Which is precisely why better media are viewed as a mixed blessing by
the publishing industry.

There can be a rather looser attitude to error-tolerance. on an audio
CD, I suppose.

Audio CD playback corrects errors by interpolation, which is fast,
usually good enough for human consumption, and in fact is *more* robust
on seriously damaged disks. Data CDs use error correcting codes, because
they need to return exactly the right bits... but that means that when
the damage is worse than the ECC can deal with, they basically give up.

Sorry, this is simply not correct. CD's use interpolation only if
the already built-in error correcting codes fail. Red book CD's
already use a couple of layers of error correction, including
CIRC. The actual unrecovered data error rate on even moderately
maintained disks is still on the order of 1 bit in 10^12 or better.

Now CD-ROM adds another layer or two of error correction on top of
that. But to state that CD's ONLY use interpolation for error
recovery is simply false.