“While the c# minor fugue awakens the conception of a mighty cathedral, the two numbers in b-flat minor may be likened to artistically wrought side-chapel’s vaults, in which things most precious are kept.” —Busoni’s remarks on BWV 867.

Things most precious, indeed. We might well wrap up this dark pearl of b-flat minor and guard it in the ‘side-chapel vaults’ of our hearts. What noble suffering, what secret anguish, what quiet pain is here! To know this music is to be changed, to expand one’s emotional capacity.

Notice how, in Bach’s calligraphy, each note in this nine (!) note chord has its own stem:

Such detail is sadly missing from any printed edition:

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The fugue, in five voices, appears to be almost entirely in stretto, each voice interrupting the former. Notice the overlapping colors:

This culminates in what I imagine to be a personal victory for Bach, ‘stretto-ing the stretto,’ making the entrances as close as possible, where the second note of one voice becomes the first note of the next, from top to bottom, all five voices in a masterful technical display:

(Looks a bit crowded, yes, but that’s the idea!)

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Concepts Covered: We study the B-flat minor prelude, BWV 867, the Well-Tempered Clavier Book One, both five voice fugues in the second and penultimate minor positions, early manuscript and earliest version alongside P. 415, Bach’s revision of one extra measure. The fugue as a stretto fugue, possible connections between prelude and fugue, a complete stretto in five voices, a five-voice stretto, as well as the Busoni edition’s poetic description of this pair.

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