[linux-audio-user] Reading/playing a "copy protected" CD : Reed-Solomon correction?

[Sampo Savolainen]

Hi,

The black magic marker fix works only for one type of copy protection.
 
I have tested ripping many copy protected CDs and cdparanoia + my drive
(DRU-510a) works wonders on most. Sometimes I have to re-insert the cd a
few times before it worked. Some times cdparanoia reads the start of the
disc (about a minute worth of playing time) VERY slowly, but after that
everything is dandy. I've come over a few discs where the first track is
unrippable (or I wasn't patient enough), but all others come out very
easily.

All in all. The "copy protection" schemes are quite ineffective.
Especially when cdparanoia is not created for protected CDs, just
defective ones.. But I guess that is just poetic justice. :)


  Sampo

On Sun, 2004-06-27 at 19:40, lee wrote:
> Sampo Savolainen wrote:
> 
> > Hi, 
> > 
> > You can probably play/rip it with cdparanoia 'enhanced' software. Your
> > first and best tool for recovering data from copy protected or otherwise
> > broken (so-called) CDs is to use the command line cdparanoia.
> > 
> > "man cdparanoia" for details
> 
> A friend of mine passed me one of these last week. The copy protection 
> somehow makes it impossible for a CD-ROM drive to even recognize there's 
> a disc in the drive. Regardless of OS or software used to copy audio, it 
> acts as if there's no disc present.
> 
> I've heard black magic marker can be drawn on certain areas to 
> "undamage" the disc. I haven't done any reading on the subject but I'm 
> sure google has some advice.
> 
> -lee