The Neapolitan and Augmented Sixth Chords

In minor keys, iv, ii^O, and ii^Ø7 are diatonic chords. As we learned in Chapter 17, these chords may appear in major keys as mixture chords borrowed from the parallel minor. In either mode, they are typically Predominant chords, with ♭https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315167749/87589aa0-fefc-4a15-9183-3352305db7a3/content/6-circ.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> tending downward to https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315167749/87589aa0-fefc-4a15-9183-3352305db7a3/content/5-circ.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> as the syntax shifts to D. The Neapolitan and augmented sixth chords are chromatic Predominant chords containing bhttps://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315167749/87589aa0-fefc-4a15-9183-3352305db7a3/content/6-circ.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> as well as other altered scale degrees.