A♭9
A♭ Dominant 9th · 4 fingerings
The dominant ninth extends a dominant seventh with the ninth on top, so A♭9 keeps all the drive of a seventh while sounding noticeably richer and more sophisticated. It's the definitive funk and soul rhythm-guitar chord — the sound of a tight sixteenth-note groove — and it's equally at home in blues and jazz.
A♭9 · position 1
A♭9 · position 2 · fret 4
A♭9 · position 3 · fret 5
A♭9 · position 4 · fret 10