Formula and Structure of the C#11 Chord
Interval formula from the root note: 1 — 3 — 5 — b7 — 9 — 11. The chord consists of the following notes:
- Db — unison and the main tonal anchor.
- F — major third with a bright major quality and clear stability above the tonic.
- Ab — perfect fifth, stabilizing the triad and adding tonal grounding.
- B — minor seventh with dominant pull toward the tonic.
- Eb — major ninth, opening the top line and adding airiness to the texture.
- Gb — eleventh with a spicy fourth above the octave, best voiced apart from the third.
Together, these notes form the harmonic foundation of the C#11 chord, defining its sound and role in the musical context.
Alternative Names for the C#11 Chord
There are no alternative names for this chord.
Using the C#11 Chord
Put the 11 in the middle register and separate it from the 3 and b7 to avoid excessive harshness. Use a leading tone for a smooth resolution. Works well in blues, funk, and jazz passages where the 11 adds spice without breaking the harmonic base.
Conclusion
C#11 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.
