Major and Minor Harmonized Chord Charts are used for while doing a Harmonic Analysis (HA). Shows triads and 4-part chords for ALL 15 major and minor keys. "Yes, Virginia there are 15 keys."

"Ab Major" (or the key of Ab) is a major scale based on Ab, with the pitches Ab Bb C D Eb F G. Its key signature has four flats: Bb Eb Ab Db. Its Relative Minor scale is F Minor. Its Parallel Minor is Ab Minor.

The primary chords for any major key are the I, IV and V chords of its corresponding major scale. For Ab Major, the primary chords are: Ab, Db, Eb and Eb7. From the primary and secondary chords of a major key, countless songs and chords progressions can be played.

The secondary chords for any major key are the II, III and VI chords of it's corresponding major scale. For Ab Major, the secondary chords are: Bbm, Cm and Fm. From the primary and secondary chords of a major key, countless songs and chords progressions can be played.

Common chord progressions for the key of Ab. Using the primary and seconday chords for the key explore these common chord progressions for the key of Ab.

Harmonic Analysis is the understanding of the functional sequence of chords. It is the process used to analyze the harmonic structure of a progression, song or composition. This analysis is then used to make scale selections for improvisation and chord substitution.