"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.

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."

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.