Andy,

iTunes changes mp3 files when the changes you are making are official 
MP3 tags. If they are just private meta-data, it's in the local xml file 
which is in your My Documents/My Music/iTunes directory.

So it depends what you do.

Gilles.

Andy Ruhl wrote:
> On 4/16/07, Chuck Swiger <cswiger@mac.com> wrote:
>
> I don't know if iTunes actually changes mp3 files it didn't create? I
> semi-tested this by trying to tag files with iTunes and it didn't
> actually tag the mp3 file. I assume it's keeping the tag info in it's
> database, or something.
>

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