[vorbis] Copy protected CDs (off-topic)

[Segher Boessenkool]

Frank Klemm wrote:
> 
> On Mon, Dec 18, 2000 at 02:52:42AM +0100, Segher Boessenkool wrote:
> > 3) Use some different kind of plastic for the cd, a kind which
> >    will not be easy to the cdrom laser, but still is ok to a cd
> >    laser (cdrom lasers are a different color).
> >
> What's the difference between 780 nm (CD player) and 780 nm (CD-ROM drive)?

As far as I know, higher speed cdrom drives use shorter wavelength
lasers to reduce the amount of read errors. I could be wrong, of
course; I don't know cdrom hardware that good.

Ciao,

Segher

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