Neapolitan 6th and Augmented 6th Chords

The “Neapolitan 6th” chord is a 1st inversion of the supertonic [chord two] triad but with the  root and fifth lowered a half step.

In modern terms we could think of it as a flattened second chord 1st inversion. Below is a more popular common approach.

Minor Key example:

[In this case only the root is lowered as the C minor key signature already has the Ab in the key signature]

OTHER COMMON AUGMENTED 6 TH CHORDS

These chords can occur on the flattened submediant [flattened chord 6] of the major scale or the normal submediant [chord 6] of the minor scale.

FRENCH SIXTH

ITALIAN 6TH

GERMAN 6TH

 

9ths 11ths and 13ths harmony:

One last idea using the 7th chord as a Diminished chord followed by the dominant 7th 1st inversion to C the Tonic chord.

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