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