[vorbis] Copy protected CDs (off-topic)

[David Balazic]

Aleksandar Dovnikovic (aldov at EUnet.yu) wrote :

( sorry if you receive this mail twice )

>    "Frank Klemm" <pfk at fuchs.offl.uni-jena.de> wrote:
>      
> > Some DVD drives are using green Layer light to also read out CD-ROMs and CD
> > DA. This reduces contrast for pressed CDs (no lambda/2 interference) and 
> > especially for CD-Rs (dye absorption maximum), because they are optimized 
> > for 780 nm. 
>      
> Maybe you can answer one question that bugged me for some time and
> everywhere I asked I only got vague responses: why some audio CD
> players sound worse when using audio CD-R instead of original
> (pressed) audio CD? WAVs from both CDs are exact match, so why
> do they sound different?

>From the page http://www.fadden.com/cdrfaq/faq04.html#[4-18] :

> The manual for the CDD2000 reportedly states that the drive
> uses 4x oversampling when playing back pressed CDs, but switches
> to 1x for CD-R. This affects the quality of the D/A conversion,
> and can make an audible difference

There is more on that page , but not any definitive answer.


-- 
David Balazic
--------------
"Be excellent to each other." - Bill & Ted
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