[JansjoFromIkea]

Love the game, even bought an E3 shirt for it from a random person via a google image search years back.

Might be worth just directly asking Masaya Matsuura about this if you get stuck, he's fairly accessible via facebook (or at least he used to be).

Also, I've done no machine learning stuff at all, but wouldn't something like Vib Ribbon be absolutely ripe for reverse engineering via finding trends in the kinds of levels produced on the basis of the kind of music played fed into them?

[cossinle]

About that last point: yeah it should be something like that, the patent for it's system actaully goes into quite a bit of detail about it (if anyone's curious: https://patentimages.storage.googleapis.com/c3/3b/7a/f6f2da3... )

[xPyth]

The algorythm used can be found in the game patents, they explain how they are analysing the audio waves in order to generate the map. For the default soudtracks, they are simply pre-created with a script file explainig the map format.