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C dominant ninth chord
The C9 chord (dominant ninth) is made of the notes C, E, G, B♭, D. Its formula compared with the major scale is 1 3 5 ♭7 9.
C9
Ninths · 5 notes
Note names
How it is built
| Degree | Note | Interval from the root |
|---|---|---|
| 1 | C | Unison |
| 3 | E | Major third |
| 5 | G | Perfect fifth |
| ♭7 | B♭ | Minor seventh |
| 9 | D | Major ninth |
Inversions
- C9C E G B♭ DRoot position
Frequently asked questions
- Which notes make up the C9 chord?
- The notes are C, E, G, B♭, D.
- What is the formula of the C9 chord?
- The formula is 1 3 5 ♭7 9: major third, perfect fifth, minor seventh, major ninth.
From theory to practice
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