can't mount cdrom

[Jason Stephenson]

Um, actually, no. There is a table of contents on the audio CD which 
tells the player where the tracks begin and end. CDParanoia probably 
reads this to rip the tracks. I know that KSCD and other CD players read 
that information.

Actually, some CD copy protection works by inserting extra tocs that 
point to bogus entries. Supposedly, a CD music player will read only the 
first toc, whereas a computer will read the last. If the first is good, 
then the cd should be playable on a regular cd player. If the last is 
bad, it should confuse the computer. Of course, you can always write the 
CD driver to ignore bad tocs and read them all, thus defeating the "copy 
protection."



John Abreau wrote:
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> greg at freephile.com writes:
> 
> 
>>Thanks for your replies.  It turnss out the disk *is* CDAudio.
>>
>>The friend who gave me the CD said it was mp3 files. As I'm not 
>>accustomed to burning copies of .cda files, I never thought that the 
>>disk could have .cda files on it.  It did.  So in essence, it was like a 
>>  store-bought CD.
>>
>>I never knew that Linux wouldn't read that format without ripping the 
>>files with CDParanoia or some such utility.  I know that there is every 
>>sort of converter under the sun, but how come Linux won't just recognize 
>>the .cda file format?  After all, KSCD and other players will recognize 
>>it.  CDParanoia recognizes the format, how come a full-blown GUI install 
>>of Linux doesn't recognize CDAudio?
> 
> 
> A CD audio disc doesn't have any files on it to read; it just has the raw 
> audio bits. KSCD and the other players don't read files from an audio cd; 
> they recognize that it's an audio cd, and tell the cdrom drive to play 
> the audio directly into the sound card.
> 
> As I understand it, cdparanoia essentially does the same thing; it tells 
> the cdrom drive to play the audio through its digital sound output, and 
> then writes that audio stream into a file.
> 
> 
> - --
> John Abreau / Executive Director, Boston Linux & Unix
> Email jabr at blu.org / WWW http://www.abreau.net / PGP-Key-ID 0xD5C7B5D9
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