[gentoo-user] Re: Verification of audio CD copy?

[Nikos Chantziaras <realnc@arcor.de>]

Joerg Schilling wrote:
> Dale <rdalek1967@gmail.com> wrote:
> 
>> Could it be some copy protection thing that is new maybe?  Something k3b
>> can't quite copy.
> 
> There is no copy protection system for audio CDs.

There is, unfortunately.  An example is "Cactus Data Shield".  The bad 
thing is that it even breaks the standard, resulting in the copy 
protected audio CD not playing back in some players (PC CD-ROMs for 
example or CD players with MP3 support).

Such CDs are actually required to refrain from using the "CDDA" logo on 
their casing.  Some even mention that they are copy protected.

See:

http://en.wikipedia.org/wiki/Copy_protection#Copy_protection_for_audio_CDs

for more info.

In any case, it's very difficult or even impossible to copy some of them 
with regular CD-ROM drives.  Some require analog copying or using the 
digital-out connector of the drive.