Chord · Altered Dom.
A♭7♭9♭13 — A♭ Altered ♭9♭13
A♭7♭9♭13 is the A♭ altered ♭9♭13 chord. It is built on the root A♭ with major 3rd (C), perfect 5th (E♭), minor 7th (G♭), minor 9th (B𝄫) and minor 13th (F♭) above it — the formula 1 3 5 ♭7 ♭9 ♭13, sounding the notes A♭ C E♭ G♭ B𝄫 F♭. 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♭9♭13.
- Root
- A♭
- Quality
- Altered ♭9♭13
- Formula
- 1 3 5 ♭7 ♭9 ♭13
- Notes
- A♭ C E♭ G♭ B𝄫 F♭
On the keyboard
The notes of A♭7♭9♭13
| 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 |
| ♭13 | F♭ | minor 13th | F♭6 |
Other altered dom. on A♭
Altered ♭9♭13 chords on every root
Part of the chord reference. See also the scales and the keys.