Chord · 6ths & Adds
A♭6/9♯11 — A♭ Six-Nine ♯11
A♭6/9♯11 is the A♭ six-nine ♯11 chord. It is built on the root A♭ with major 3rd (C), perfect 5th (E♭), major 6th (F), major 9th (B♭) and augmented 11th (D) above it — the formula 1 3 5 6 9 ♯11, sounding the notes A♭ C E♭ F 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♭6/9♯11.
- Root
- A♭
- Quality
- Six-Nine ♯11
- Formula
- 1 3 5 6 9 ♯11
- Notes
- A♭ C E♭ F B♭ D
On the keyboard
The notes of A♭6/9♯11
| Degree | Note | Interval from the root | Pitch |
|---|---|---|---|
| 1 | A♭ | root | A♭4 |
| 3 | C | major 3rd | C5 |
| 5 | E♭ | perfect 5th | E♭5 |
| 6 | F | major 6th | F5 |
| 9 | B♭ | major 9th | B♭5 |
| ♯11 | D | augmented 11th | D6 |
Other 6ths & adds on A♭
Six-Nine ♯11 chords on every root
Part of the chord reference. See also the scales and the keys.