In article ,
David Billington wrote:
I thought that in the case of audio media the sections of the disk
normally used on data CDs for error checking and correction data were
instaed used to store extra audio info hence no error correction on
audio CDs.

Actually, consider it the other way around:

1) The standard for CDs was for Audio *first*.

2) The audio CDs have a sector size larger than the 2048 byte size
used for data CDS, and follow that with an additional chunk for
The ECC (Error Checking and Correction code).

3) When used for *data* purposes, the difference between the audio
and data sector sizes are used for an *additional* layer of ECC,
so the data off the CD is *doubly* checked.

So -- from your point of view, there is less error checking for
audio purposes, but there still is quite a bit. even with audio. If it
can't actually *fix* an error, it will replace the bad sample with an
average of the adjacent samples, which helps hide the error, at least.

So -- in any case, greater errors on the raw CD result in less
perfect audio reproduction, but not the glaring errors to be found with
a flipped bit (which would probably come out as a loud "click" on
playback without that substitution.)

Enjoy,
DoN.

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