Chord · 13ths
A♭13♭9♯11 — A♭ 13th ♭9 ♯11
A♭13♭9♯11 is the A♭ 13th ♭9 ♯11 chord. It is built on the root A♭ with major 3rd (C), perfect 5th (E♭), minor 7th (G♭), minor 9th (B𝄫), augmented 11th (D) and major 13th (F) above it — the formula 1 3 5 ♭7 ♭9 ♯11 13, sounding the notes A♭ C E♭ G♭ B𝄫 D F. On the piano it sits at Ab (octave 4) and above in the library's voicing; the same 7 notes in any octave are still A♭13♭9♯11.
- Root
- A♭
- Quality
- 13th ♭9 ♯11
- Formula
- 1 3 5 ♭7 ♭9 ♯11 13
- Notes
- A♭ C E♭ G♭ B𝄫 D F
On the keyboard
The notes of A♭13♭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 |
| ♭7 | G♭ | minor 7th | G♭5 |
| ♭9 | B𝄫 | minor 9th | B♭♭5 |
| ♯11 | D | augmented 11th | D6 |
| 13 | F | major 13th | F6 |
Other 13ths on A♭
13th ♭9 ♯11 chords on every root
Part of the chord reference. See also the scales and the keys.