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A♭ Dominant 9th

Notes: A♭ – C – E♭ – G♭ – B♭
Degrees: 1 – 3 – 5 – ♭7 – 9Also written: A♭9Lower B♭ to B♭♭ and it is A♭7♭9; raise B♭ to B and it is A♭7♯9. A♭, C, E♭ and G♭ do not move.

The A♭ Dominant 9th chord is a five-note chord made up of A♭, C, E♭, G♭, and B♭.

A♭ Dominant 9th chord: A♭, C, E♭, G♭, B♭

It is built from a root, major third, perfect fifth, minor seventh, and major ninth.

A dominant 7th plus the 9th: funkier and brighter than a plain 7th, common in funk and soul.

G♯ Dominant 9th
This is the same chord as G♯ Dominant 9th: the same keys on the keyboard, spelled with sharps.

Construction

A♭ Dominant 9th = Root + Major 3rd + Perfect 5th + Minor 7th + Major 2nd = A♭, C, E♭, G♭, B♭
NoteIntervalDegree
A♭Root1
CMajor 3rd3
E♭Perfect 5th5
G♭Minor 7th♭7
B♭Major 2nd9

How to Play the A♭ Dominant 9th

Right Hand (RH)

Place your right hand over the keys with the thumb on the root. Use the fingering: 1 – 2 – 3 – 4 – 5

Left Hand (LH)

For the left hand, start with your pinky on the root. Use the fingering: 5 – 4 – 3 – 2 – 1

A♭ Dominant 9th : Frequently Asked Questions

What is the A♭ Dominant 9th chord on piano?
The A♭ Dominant 9th chord contains the notes A♭ – C – E♭ – G♭ – B♭. On piano, play these notes together to sound the chord.
What notes are in the Ab Dominant 9th chord?
The Ab Dominant 9th chord (Ab9) contains 5 notes: Ab, C, Eb, Gb, Bb. Formula: R-M3-P5-m7-M9.
How is Ab9 used in music?
Ab9 is used in jazz, fusion, and contemporary music to add harmonic color. It appears as a dominant or tonic chord depending on context.
What is the scale degree formula for Ab9?
Ab9 uses scale degrees 1-3-5-b7-9, giving it its distinctive sound.

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