Volume 6 contains the three collections that Bach himself took to the printer: the Dritter Teil der Clavier-Übung was published in 1739; the Sechs Choräle von verschiedener Art ("Schübler-Choräle") and the Canonische Veränderungen über “Vom Himmel hoch” were released in separate editions most likely in 1747/48. None of these collections had from the start the appearance which the composer considered as valid in the end. For this reason, Werner Breig focuses in particular on questions of origin in his introduction. Fundamental findings on the genesis of the "Clavier-Übung III" were made only after the publication of the work in the "Neue Bach-Ausgabe." The basically unproblematic state of the sources means that this volume contains no supplementary material online. It was, however, considered editorially necessary to print the Canonische Veränderungen BWV 769 in three versions: as a facsimile of the original print, in a practical arrangement, and in the autograph version (BWV 769a).

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