John Joyce wrote:
> Does anybody know how to identify (validate) mp3 files (other audio
> files would be interesting as well) by 'magic number'?

> I did find this online as a purported mp3 magic number (in hex of course),
> 49 44 33
> but I'm not even going to bother using it since I don't know
> definitively that all mp3's will have it, and I don't know where to
> expect it in the file.

does this help: http://raa.ruby-lang.org/project/filemagic/

Stefan