[paranoia] cdda question

[Laurent Pinchart]

> I'm sorry if this is in the wrong mailing list, but I figured you guys
> would know. This is probably a dumb/silly question so bear with me :)
> I'm under the impression that when audio data is stored on a cd it is
> raw and header-less.

It's not exactly "raw", as there are ECC (Error Correction Code) data and 
subchannels that go with the audio, but it's more "raw" than non-audio data 
(which has extra error correction codes and headers).

> When I play a cd with say xmms, xmms seems to be
> able to extract the band/album/song data from the cd. Where/how is this
> stored on the cd?

It's not stored on the CD. Xmms computes a CDDB ID (using the number of 
tracks, their length and some other information) that is supposed to identify 
the CD. It then queries a CDDB database on the internet to get the 
band/album/track information.

Laurent Pinchart

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