Chord · Altered Dom.
C7♯5♭9/11 — C Altered ♯5♭9 / 11th
C7♯5♭9/11 is the C altered ♯5♭9 / 11th chord. It is built on the root C with major 3rd (E), augmented 5th (G♯), minor 7th (B♭), minor 9th (D♭) and perfect 11th (F) above it — the formula 1 3 ♯5 ♭7 ♭9 11, sounding the notes C E G♯ B♭ D♭ F. On the piano it sits at C (octave 4) and above in the library's voicing; the same 6 notes in any octave are still C7♯5♭9/11.
- Root
- C
- Quality
- Altered ♯5♭9 / 11th
- Formula
- 1 3 ♯5 ♭7 ♭9 11
- Notes
- C E G♯ B♭ D♭ F
On the keyboard
The notes of C7♯5♭9/11
| Degree | Note | Interval from the root | Pitch |
|---|---|---|---|
| 1 | C | root | C4 |
| 3 | E | major 3rd | E4 |
| ♯5 | G♯ | augmented 5th | G♯4 |
| ♭7 | B♭ | minor 7th | B♭4 |
| ♭9 | D♭ | minor 9th | D♭5 |
| 11 | F | perfect 11th | F5 |
Other altered dom. on C
Altered ♯5♭9 / 11th chords on every root
Part of the chord reference. See also the scales and the keys.