Nota Cambiata

Complexity : 3/10 (simple to intermediate)

This is a four note figure. The fourth note is a 3rd below the first. In between come the diatonic passing note followed by the appoggiatura below the last note.
The shape of the figure and soundness of harmonic basis form the guides to identifying the nota cambiata.
This figure can move in parallel 3rds or 6ths. In such a case, the lower note must be either both diatonic or both chromatic.
Change of chord on the third note is also possible.