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Published on Mar 23, 2012
The perpetual canon (on the "king's theme") from J. S. Bach's Musical Offering, BWV 1079. FAQ
Q: It sounds kind of ... weird ... what's going on? A: As guessed by YouTube viewer Typoczyn, the pitch of the recording is lowered to counteract the rising pitch of the canon. As written, the canon modulates up a whole step each cycle, as shown in the upper graphic. The pitch of the recording is adjusted so that it slowly drops down a whole step during each cycle; this is suggested by the lower graphic, in which the upper score (which starts in C minor and modulates to D minor) replaces the lower score (which starts in D minor and modulates to E minor). Not exactly the same as the Shepard tone (see Wikipedia), but similar.