Play the sixth ninth chord on piano
The sixth ninth chord (6/9 or 6-9) combines a major triad with major sixth and ninth, creating a very rich and open sound.
Chord composition
| I | III | V | VI | IX |
| Root | Major third | Perfect fifth | Major sixth | Major ninth |
| 0 | 4 | 7 | 9 | 14 |
Formula 1 - 3 - 5 - 6 - 9
Theory
The 6/9 chord adds a major ninth to the 6 chord. C 6/9 = C-E-G-A-D, F 6/9 = F-A-C-D-G. Entirely consonant, without seventh, it offers bright and rich sound. Widely used in jazz as final tonic chord, it can replace a simple major chord to enrich harmony. The fifth can be omitted for compact voicing.
Play the sixth ninth chord on the piano
