Guitar Chord C#7sus4: Structure, Notes and Theory

C#7sus4 — a chord from the note “C#” with suspended dominant tension and a fourth instead of a third. Excellent for sustaining expectation in cadences, intros and bridges, adding motion without harshness. Sounds great in rhythmic picking.

Formula and Structure of the C#7sus4 Chord

Interval formula from the root note: 1 — 4 — 5 — b7. The chord consists of the following notes:

• Db — unison and the main tonal anchor.
• Gb — perfect fourth with a spicy flavor, best voiced apart from the third.
• Ab — perfect fifth, stabilizing the triad and adding tonal grounding.
• B — minor seventh with dominant pull toward the tonic.

Together, these notes form the harmonic foundation of the C#7sus4 chord, defining its sound and role in the musical context.

Alternative Names for the C#7sus4 Chord

There are no alternative names for this chord.

Using the C#7sus4 Chord

Hold the 4 in the top voice and resolve it to 3 for a V -> I cadence. Keep b7 stable in the middle voice, and on top add 9 or 13 for brightness. In rhythm parts use syncopated strokes and quartal voicings. Avoid doubling the 4 in the low register to keep the bass light.

Conclusion

C#7sus4 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.