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Does anybody know how songs hold genius info, and does changing a track name affect this?

Originally, I assumed each track had some sort of metadata which said how it should be turned into a genius playlist. This way, only songs with entries in gracenote would be able to make a genius playlist.

However, the other day, I bought an album, and when importing it into iTunes, fount it had no gracenote recognition. I added all the details (artist, track name, ect) manually.

A day or so later, I discovered that a couple of tracks could make a genius playlist, even when they weren't recognised on gracenote!

So now I assume that the data is held using the details that the track has (artist, genre ect.).

My problem is, if the data is stored by the details a track has, will changing the details remove the ability to create a genius playlist? I have many tracks where I have changed the details (ie. "Track" by "Artist feat. Artist" to "Track [feat. Artist]" by "Artist")

So does anybody know how this data is stored, and will it affect my genius playlists?

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up vote 0 down vote accepted

The song name, album name and length are used for recognition by Gracenote - which means when you changed and added the song details manually, it was recognised.

As far as I know, the same details are used for Genius, so anything that Gracenote recognises will work - and the playlists are made on Apple servers.

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Thanks. So you don't think songs where I've changed the track name will be able to be made into a genius playlist? – ACarter Feb 20 '12 at 17:39
No, I don't think so. The only other way I can think it would ID them is by audio sampling but that I think would be over complicating it for themselves. – George Pearce Feb 20 '12 at 20:29
Yeah, I suppose so. Thanks for your help anyway. – ACarter Feb 20 '12 at 20:51

I found a large (140,040 KB) file named "iTunes Library Genius.itdb" in my iTunes music folder. I tried to view it but it is all non-printable characters. I think the Genius information is stored locally.

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