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A♭ Dominant 9th Chord (A♭9)

Notes: A♭, C, E♭, G♭, B♭. Tap any diagram to hear it.

A♭9
Notes
A♭CE♭G♭B♭
Formula
1 – 3 – 5 – ♭7 – 9

A♭9 on guitar

Fret 1 · most common
4-1-1-1-1-2
Fret 4
4-6-4-5-4-6
Fret 8
x-11-8-11-9-8

Strings from low (left) to high (right). Numbers are fingers: 1 index, 2 middle, 3 ring, 4 pinky. × = don’t play, ○ = open string.

A♭9 on ukulele

Open position · most common
1-0-2-1
Fret 8
11-10-8-11

A♭9 on piano

Other A♭ chords

Dominant 9th chords in other keys

About the A♭ Dominant 9th chord

Dominant ninth chords extend the seventh chord with a ninth, for the rich sound of funk, soul and jazz. A♭9 is built from the root (A♭), major third (C), perfect fifth (E♭), minor seventh (G♭), major ninth (B♭).

Frequently asked questions

What notes are in the A♭ Dominant 9th chord?

The A♭9 chord is made of A♭, C, E♭, G♭, B♭: the root, major third, perfect fifth, minor seventh, major ninth.

How do you play A♭9 on guitar?

The most common fingering is 4-1-1-1-1-2, from the low E string to the high E string (x = don’t play that string, 0 = open string). It uses a barre at fret 1.

How do you play A♭9 on piano?

Press A♭, C, E♭, G♭, B♭ together. In root position the lowest note is A♭.