Chord · 9ths
C9 — C Dominant 9th
C9 is the C dominant 9th chord. It is built on the root C with major 3rd (E), perfect 5th (G), minor 7th (B♭) and major 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 C9.
- Root
- C
- Quality
- Dominant 9th
- Formula
- 1 3 5 ♭7 9
- Notes
- C E G B♭ D
On the keyboard
Right-hand fingering for this voicing: 1–2–3–4–5 (1 is the thumb).
The notes of C9
| Degree | Note | Interval from the root | Pitch |
|---|---|---|---|
| 1 | C | root | C4 |
| 3 | E | major 3rd | E4 |
| 5 | G | perfect 5th | G4 |
| ♭7 | B♭ | minor 7th | B♭4 |
| 9 | D | major 9th | D5 |
Other 9ths on C
Dominant 9th chords on every root
Part of the chord reference. See also the scales and the keys.