Formula and Structure of the C6/9 Chord
Interval formula from the root note: 1 — 3 — 5 — 6 — 9. The chord consists of the following notes:
- C — unison and the main tonal anchor.
- E — major third with a bright major quality and clear stability above the tonic.
- G — perfect fifth, stabilizing the triad and adding tonal grounding.
- A — major sixth with a warm upper hue, pairing with the 9 to form a soft 6/9 tonic.
- D — major ninth, opening the top line and adding airiness to the texture.
Together, these notes form the harmonic foundation of the C6/9 chord, defining its sound and role in the musical context.
Alternative Names for the C6/9 Chord
This chord may appear under different names:
- C6-9
- C69
All variants refer to the same harmonic structure.
Using the C6/9 Chord
Keep the 6 and 9 in the top voice to keep the chord light and open. Avoid excessive density in the bass. Works perfectly in bossa nova and lounge as a soft tonic.
Conclusion
C6/9 is an expressive and versatile chord. Learn several fingerings, experiment with different positions and voice spacing, then try weaving it into your own playing — this will help you quickly find your unique tone.
