Chord · Altered Dom.
B♭13♯9 — B♭ 13th ♯9
B♭13♯9 is the B♭ 13th ♯9 chord. It is built on the root B♭ with major 3rd (D), perfect 5th (F), minor 7th (A♭), augmented 9th (C♯) and major 13th (G) above it — the formula 1 3 5 ♭7 ♯9 13, sounding the notes B♭ D F A♭ C♯ G. On the piano it sits at Bb (octave 3) and above in the library's voicing; the same 6 notes in any octave are still B♭13♯9.
- Root
- B♭
- Quality
- 13th ♯9
- Formula
- 1 3 5 ♭7 ♯9 13
- Notes
- B♭ D F A♭ C♯ G
On the keyboard
The notes of B♭13♯9
| Degree | Note | Interval from the root | Pitch |
|---|---|---|---|
| 1 | B♭ | root | B♭3 |
| 3 | D | major 3rd | D4 |
| 5 | F | perfect 5th | F4 |
| ♭7 | A♭ | minor 7th | A♭4 |
| ♯9 | C♯ | augmented 9th | C♯5 |
| 13 | G | major 13th | G5 |
Other altered dom. on B♭
13th ♯9 chords on every root
Part of the chord reference. See also the scales and the keys.