Chord · Altered Dom.
A♭7♯9 — A♭ Dominant 7th ♯9
A♭7♯9 is the A♭ dominant 7th ♯9 chord. It is built on the root A♭ with major 3rd (C), perfect 5th (E♭), minor 7th (G♭) and augmented 9th (B) above it — the formula 1 3 5 ♭7 ♯9, sounding the notes A♭ C E♭ G♭ B. On the piano it sits at Ab (octave 4) and above in the library's voicing; the same 5 notes in any octave are still A♭7♯9.
- Root
- A♭
- Quality
- Dominant 7th ♯9
- Formula
- 1 3 5 ♭7 ♯9
- Notes
- A♭ C E♭ G♭ B
On the keyboard
The notes of A♭7♯9
| Degree | Note | Interval from the root | Pitch |
|---|---|---|---|
| 1 | A♭ | root | A♭4 |
| 3 | C | major 3rd | C5 |
| 5 | E♭ | perfect 5th | E♭5 |
| ♭7 | G♭ | minor 7th | G♭5 |
| ♯9 | B | augmented 9th | B5 |
Other altered dom. on A♭
Dominant 7th ♯9 chords on every root
Part of the chord reference. See also the scales and the keys.