Chord · Altered Dom.
A♭7♯5♭9/11 — A♭ Altered ♯5♭9 / 11th
A♭7♯5♭9/11 is the A♭ altered ♯5♭9 / 11th chord. It is built on the root A♭ with major 3rd (C), augmented 5th (E), minor 7th (G♭), minor 9th (B𝄫) and perfect 11th (D♭) above it — the formula 1 3 ♯5 ♭7 ♭9 11, sounding the notes A♭ C E G♭ B𝄫 D♭. On the piano it sits at Ab (octave 4) and above in the library's voicing; the same 6 notes in any octave are still A♭7♯5♭9/11.
- Root
- A♭
- Quality
- Altered ♯5♭9 / 11th
- Formula
- 1 3 ♯5 ♭7 ♭9 11
- Notes
- A♭ C E G♭ B𝄫 D♭
On the keyboard
The notes of A♭7♯5♭9/11
| Degree | Note | Interval from the root | Pitch |
|---|---|---|---|
| 1 | A♭ | root | A♭4 |
| 3 | C | major 3rd | C5 |
| ♯5 | E | augmented 5th | E5 |
| ♭7 | G♭ | minor 7th | G♭5 |
| ♭9 | B𝄫 | minor 9th | B♭♭5 |
| 11 | D♭ | perfect 11th | D♭6 |
Other altered dom. on A♭
Altered ♯5♭9 / 11th chords on every root
Part of the chord reference. See also the scales and the keys.