C
C9sus4
Notes
C · F · G · Bb · D
Intervals
- RootC (1P)
- Perfect 4thF (4P)
- Perfect 5thG (5P)
- Minor 7thBb (7m)
- Major 9thD (9M)
Fretboard
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About
The C9sus4 (C–F–G–B♭–D) extends 7sus4 with a 9th. The D adds color above the suspended structure, and the absence of the third means the chord can function either as deferred dominant tension or as a stable texture in its own right — the latter is common in gospel and R&B, where 9sus4 chords are often held for extended periods without resolving. The 4th, ♭7, and 9th are the essential tones; the 5th can be dropped. Compared to C7sus4, the 9th adds warmth and sophistication without increasing the sense of urgency. When it does resolve, F is the typical landing.
Similar chords
Chords sharing two or more notes with this one, ranked by overlap.
Scales containing this chord
- C Natural Minor (I)
- B♭ Major (II)
- B♭ Major Pentatonic (deg 2)
- D Natural Minor (VII)
- E♭ Major (VI)
- F Major (V)
- F Melodic Minor (V)
- G Blues (deg 3)
- G Minor Pentatonic (deg 3)
- G Natural Minor (IV)
- C Dorian (I)
- C Mixolydian (I)
- A Locrian (III)
- A Phrygian (III)
- A♭ Lydian (III)
- B♭ Lydian (II)
- B♭ Mixolydian (II)
- D Locrian (VII)
- D Phrygian (VII)
- E Locrian (VI)
- E♭ Lydian (VI)
- F Dorian (V)
- F Mixolydian (V)
- G Dorian (IV)
- G Phrygian (IV)
Scales whose notes include every chord tone. Roman numeral marks the chord root’s position in the scale; dashed badges aren’t linked yet.