Computer-generated music with data from real artists

Chordi asks you to select an instrument and a chord pattern, then procedurally-generates thirty seconds of obviously procedurally-generated music. It's still "talking dog" territory-so fascinating that it doesn't matter how good it is-but it really does sound vaguely yet uncannily like a certain famous rock group jamming while drunk.

Recommended settings for maximally-unpleasant results: "Tango accordion", "Minor key". The source code is on Github.