Editing Goldberg Variations (section)

=== Variatio 12. a 1 Clav. Canone alla Quarta in moto contrario ===
{{listen|type=music|help=no|filename=Goldberg Variations 13 Variatio 12 Canone alla Quarta.ogg|title=Variatio 12. Canone alla Quarta|description=Performed by Kimiko Douglass-Ishizaka on piano}}
This is a canon at the fourth in {{time signature|3|4}} time, of the inverted variety: the follower enters in the second bar in [[contrary motion]] to the leader.

In the first section, the left hand accompanies with a bass line written out in repeated quarter notes, in bars 1, 2, 3, 5, 6, and 7. This repeated note motif also appears in the first bar of the second section (bar 17, two Ds and a C), and, slightly altered, in bars 22 and 23. In the second section, Bach changes the mood slightly by introducing a few [[appoggiatura]]s (bars 19 and 20) and trills (bars 29–30).