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You may enjoy the visualization of this Chopin Nocturne.
The spiral visualization approach has a fascinating algorithm underlying it. If you render a piece of music to a MIDI file, and try to turn it back into sheet music, without some extra info, the flats and sharps will often get mixed up, and the resulting sheet music will be very hard to read. Harmony either departs from the all-white keys in the Sharps or Flats direction, but the two are only very rarely inter-mixed (usually jazz....)
But using the spiral algorithm and a reference pitch (the tonic note), it's possible to reconstruct the intended music score with nearly 100% accuracy. I've linked to the original paper if anyone is curious. I think I will try to take the visualization further (I did not do the original work), as perhaps intended by the authors. If anyone's tried a Roli Lumi before, that's the approach I'll try to take - light the notes differently depending on the true harmony, where sharps and flats are treated differently even though they are the same frequency (in 12-TET that is!). Then it will be interesting to see how that changes when using Just Intonation with newly composed music.