I'd also like to see visualizations which aren't based on the standard linear mapping of increasing semitones. For example, following the circle of fifths instead, and/or contextualizing to the subset of notes used in the song's musical key. Making the root note visually more dominant and the others in proportion according to mode, etc.
I don't mean to take anything away from this beautiful visualization, just something which I think would take it to the next level.
Or maybe it's the final Fugue on three subjects, done to show you where Bach stopped composing and how ishizaka completed the piece from elements of the entire work.
I have been wondering for a while if it's possible to show both harmonic and melodic relationships at the same time - garett's visualization shows the b7 to 1 movement as a large harmonic leap, but hides the fact that it's a small melodic movement
I came here to say the same thing. Moonlight has a complex harmonic structure which is completely hidden by the repetitive arpeggio and tiny interval changes. Seeing it on the circle of fifths would make it much clearer.
While listening, it occurred to me that Beethoven probably did not use a piano tuned to equal temperament. I wonder what temperament he would have used.
I don't mean to take anything away from this beautiful visualization, just something which I think would take it to the next level.