Guitar Chord C#add11: Structure, Notes and Theory

C#add11 — a chord built on the note “C#” with a clear, stable, and versatile tone. Easily expanded with extensions for extra brightness and color. The chord includes added tones: add11 — a dense midrange that should be used sparingly in low registers to preserve clarity.

Formula and Structure of the C#add11 Chord

Interval formula from the root note: 1 — 3 — 5 — 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.
• 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#add11 chord, defining its sound and role in the musical context.

Alternative Names for the C#add11 Chord

This chord may appear under different names:

• C#majadd11
• C#maadd11
• C#majoradd11

All variants refer to the same harmonic structure.

Using the C#add11 Chord

Keep the 1, 3, and 5 clear and stable to form the base. Place color tones in the top voices. Works well with gradual addition of extensions.

Conclusion

C#add11 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.