Bach, Fugue in B-flat minor, WTC I, BWV 867

The fugue in B-flat minor from the first book of J. S. Bach's Well-Tempered Clavier, performed by Kimiko Ishizaka, with an animated graphical score.
FAQ

Note: there are three versions of this video online; the first version has plain non-subject lines ...
   • Bach, Fugue in B-flat minor, WTC I, B...  
... and in the second ...
   • Bach, Fugue in B-flat minor, WTC I, B...  
... the non-subject lines have a glowing "head" to make them seem a little more alive. The third version ...
   • Bach, Fugue in B-flat minor, WTC I, B...  
... is identical to the second except for one tiny difference; I wonder whether anyone will notice it.

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

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:
  / musanim  
If you'd like to help in more specific way, consider this:
http://www.musanim.com/underwriting