Play the ninth suspended fourth chord on piano
The ninth suspended fourth chord (9sus4) combines a 7sus4 chord with a major ninth, creating a rich and suspended harmonic texture.
Chord composition
| I | IV | V | ♭VII | IX |
| Root | Perfect fourth | Perfect fifth | Minor seventh | Major ninth |
| 0 | 5 | 7 | 10 | 14 |
Formula 1 - 4 - 5 - ♭7 - 9
Theory
The 9sus4 chord adds a major ninth to the 7sus4. C 9sus4 = C-F-G-B♭-D, G 9sus4 = G-C-D-F-A. The fifth can be omitted for easier playability. This chord creates rich suspension that can resolve to a 9 chord (by lowering the fourth to the third). Widely used in jazz and funk to create complex harmonic vamps.
Play the ninth suspended fourth chord on the piano
