A♭9 chord on piano
A♭9 is A♭, C, E♭, G♭ and B♭. A♭ sits on the middle black key of the three. Hit Play and watch each key light as it sounds.
root position · A♭–C–E♭–G♭–B♭ · right hand 1-2-3-4-5
- Notes
- A♭ · C · E♭ · G♭ · B♭
- Formula
- 1 · 3 · 5 · ♭7 · 9
How to play A♭9 on piano
Start on A♭, count 4 half steps up to C, 3 half steps up to E♭, 3 half steps up to G♭ then 4 half steps up to B♭. That's the whole chord: 5 keys.
- Right hand: 1 on A♭, 2 on C, 3 on E♭, 4 on G♭ and 5 on B♭.
- Left hand: 5 on A♭, 4 on C, 3 on E♭, 2 on G♭ and 1 on B♭.
- On the keyboard it's black, white, black, black and black keys.
Two ways to voice A♭9
- root position: A♭–C–E♭–G♭–B♭. RH 1-2-3-4-5.
- close voicing: A♭–B♭–C–E♭–G♭. RH 1-2-3-4-5.
The close voicing folds the ninth down next to the root, which fits under one hand; the spread voicing sounds wider.
Moving between A♭9 and its neighbours
The chords A♭9 usually goes to, and what changes under your fingers.
- C♯ (dominant, pulls to the chord a fifth below): A♭9 to C♯: play C♯ in 2nd inversion (G♯–C♯–E♯) and G♯ stays under the same finger, while C moves up to C♯ and G♭ down to E♯. C♯ on piano
- C♯maj7 (I in D♭ major): A♭9 to C♯maj7: play C♯maj7 in 2nd inversion (G♯–B♯–C♯–E♯) and G♯ and B♯ stay under the same fingers, while E♭ moves down to C♯ and G♭ down to E♯. C♯maj7 on piano
- B♭m7 (vi in D♭ major): A♭9 to B♭m7: play B♭m7 in 1st inversion (D♭–F–A♭–B♭) and B♭ stays under the same finger, while C moves up to D♭, G♭ down to F and G♭ up to A♭. B♭m7 on piano
A♭9 is a dominant ninth: A♭7 with the ninth on top. A♭9 is the funk and soul version of A♭7, fuller on top and still pulling toward its resolution. The one-by-one button above makes that quality easy to hear.
A short A♭9 drill
Roll the chord up and back down, A♭, C, E♭, G♭, B♭, G♭, E♭, C, A♭, before playing it as a block.
The keys of A♭9
A♭9 is a dominant ninth chord, 1–3–5–♭7–9 from A♭. Root position, from the bottom: how A♭9 is built.
| Note | Key | Fingers | Role |
|---|---|---|---|
| A♭ | black key | RH 1 · LH 5 | root |
| C | white key | RH 2 · LH 4 | major third |
| E♭ | black key | RH 3 · LH 3 | perfect fifth |
| G♭ | black key | RH 4 · LH 2 | minor seventh |
| B♭ | black key | RH 5 · LH 1 | ninth |
Written G♯9, it's the same chord with the same keys.
A♭9 in context
A♭9 on guitar and ukulele
A♭9 on guitar and ukulele uses the same 5 notes in a different layout. See all three together.
Related A♭ chords on piano
Other dominant ninth chords
A♭9 on piano: questions
What notes are in A♭9 on piano?
A♭, C, E♭, G♭ and B♭: A♭ (black key), C (white key), E♭ (black key), G♭ (black key) and B♭ (black key). Right hand 1-2-3-4-5, left hand 5-4-3-2-1.
How do you play A♭9 on piano?
Press A♭, C, E♭, G♭ and B♭ together (4 black, 1 white). Right hand: 1 on A♭, 2 on C, 3 on E♭, 4 on G♭ and 5 on B♭.
What are the inversions of A♭9?
A♭9 is usually played in root position (A♭–C–E♭–G♭–B♭) or as a close voicing (A♭–B♭–C–E♭–G♭).
What does A♭9 look like on the keyboard?
black, white, black, black and black keys.
Every shape above plays only A♭, C, E♭, G♭ and B♭, checked by the site's tests. Updated September 2026.