Bach, Prelude in C-sharp major, WTC I, BWV 848

The prelude in C-sharp major from the first book of J. S. Bach's Well-Tempered Clavier, performed by Kimiko Ishizaka, with an animated graphical score.
FAQ

Q: Please tell me more about this recording.
A: Kimiko Ishizaka recorded all the preludes and fugues in the first book of Bach's Well-Tempered Clavier and put the recordings in the public domain as part of the Open Well-Tempered Clavier project, which you can read more about here:
http://www.welltemperedclavier.org/

Q: What to the colors mean?
A: The colors are assigned according to pitch class; see this page for a description:
http://www.musanim.com/HarmonicColoring/

Q: I like this animation!
A: So do I; enough that I made a second version; here's the first, simple ...
http://www.youtube.com/watch?v=rkJ18tA9DAA
... and here's the second, with a Voronoi diagram as the background ...
http://www.youtube.com/watch?v=GU4YCkDOoj0
Which do you prefer? Original too plain? Second version too busy?

Q: I appreciate the animated graphical scores you make; how can I support your work?
A: Thank you! The easiest way to support my work is by contributing via Patreon:
http://www.patreon.com/musanim
If you'd like to help in more specific way, consider this:
http://www.musanim.com/underwriting

Q: Could you please do a MAM video of _________?
A: Please read this ...
http://www.musanim.com/requests/