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Instrumental Works
Art of Fugue
The Art of Fugue (ca. 1745-1750) is Bach's final systematic collection of fugues and canons. It has been preserved in two versions, the second (printed after Bach's death) containing revisions and additions by the composer. The enlarged version comprises four simple fugues, two regular subject, and two inverted subject (all for four voices); three counter fugues (all for four voices), in which the subject is paired with an inverted answer; two double fugues (both for four voices); two triple fugues (one for three voices, one for four); four canons (all for tw voices); three mirror fugues (one for three voices, two for four), each illustrating both melodic and contrapuntal inversions; and an incomplete quadruple fugue (missing its final section, which undoubtedly would have combined the various themes from the surviving sections). Each fugue (actually called a contrapunctus by Bach) uses the same subject, or a variation of that subject.
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