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Published on Jun 28, 2016
The prelude and fugue in E minor 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: How did you do the melody at the beginning? A: To get an audio recording with an amplitude that reflected loudness of the melody, I started with the full audio, which looks like this in a spectrogram (this covers the range of fundamental frequencies of the notes in the melody, 300-1050 Hz) ... http://www.musanim.com/img/bwv855_ful... ... and then edited out everything except the fundamental of the melody, giving a spectrogram which looks like this ... http://www.musanim.com/img/bwv855_mel... ... and an audio that sounded like this ... http://www.musanim.com/mp3/bwv855_mel... Then, I ran the audio through a MATLAB script that extracted an average loudness level for each 1/60th second frame; this level was converted to dB, and the resulting range (-70 to -25 dB) was mapped to the thickness of the "ribbon."