Uploaded June 2021 | Updated September 2026, 2 weeks ago

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Question: If a piece of music is perfect both on its head and also its feet, which one is the inversion?



In the previous fugue, fugue twelve, we saw Bach took four voices, a turned everything upside down: 1234 became 4321 and what went up came crashing down. Now, fugue 13 is again a 'mirror' fugue... or is it?



This thirteenth fugue is in three voices and uses a technique almost identical to it's sister fugue, number 12, but is still more complicated. 



Topics Covered: Which comes first in number 13, the rectus or the inversus? 



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