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C sharp ninth suspended fourth (C#9sus4) chord on guitar

Notes
C♯F♯G♯BD♯
Formula
145♭79

How to play C#9sus4 on guitar

  1. Shape 1 · fret 4 · barre

    C#9sus4 chord on guitar, shape 1: barre at fret 4, notes C#, F#, G#, B, D#

  2. Shape 2 · 1st position

    C#9sus4 chord on guitar, shape 2: first position, with open strings, notes C#, F#, G#, B, D#

  3. Shape 3 · fret 9 · barre

    C#9sus4 chord on guitar, shape 3: barre at fret 9, notes C#, F#, G#, B, D#

  4. Shape 4 · fret 6 · barre

    C#9sus4 chord on guitar, shape 4: barre at fret 6, notes C#, F#, G#, B, D#

  5. Shape 5 · fret 11

    no 5th (G♯)

    C#9sus4 chord on guitar, shape 5: from fret 11, notes C#, F#, B, D#

Some shapes leave out: 5th (G♯). The caption of each one says what is missing. The 5th is the first to go: it barely changes the sound of the chord.

Numbers are fingers: 1 index, 2 middle, 3 ring, 4 pinky. x = do not play the string, o = open string. The coloured dot is the root (C sharp). The same shapes work on acoustic, classical and electric guitar.

C#9sus4 inversions on guitar

The same C#9sus4 with another chord note in the bass (the lowest note that sounds). The notes stay the same, but the colour changes, and the bass line can move by step from one chord to the next. In a chord symbol, the bass comes after the slash.

  1. 5th (G♯) in the bass2nd inversion · C#9sus4/G#

    C sharp ninth suspended fourth, C#9sus4/G#, 444444C♯9sus4/G♯11G♯C♯F♯BD♯G♯metronotuner.com

  2. 5th (G♯) in the bass2nd inversion · C#9sus4/G#

    C sharp ninth suspended fourth, C#9sus4/G#, x-11-11-11-12-11C♯9sus4/G♯11112G♯C♯F♯BD♯metronotuner.com

  3. 7th (B) in the bass3rd inversion · C#9sus4/B

    C sharp ninth suspended fourth, C#9sus4/B, x21122C♯9sus4/B2134BD♯G♯C♯F♯metronotuner.com

  4. 7th (B) in the bass3rd inversion · C#9sus4/B

    C sharp ninth suspended fourth, C#9sus4/B, 744444C♯9sus4/B441BC♯F♯BD♯G♯metronotuner.com

About the ninth suspended fourth chord

A suspended dominant with a ninth: the 4th in place of the 3rd and the 9th on top. Soft and ambiguous, it is one of the most used sounds of modern jazz, soul and gospel. It has the same notes as an eleventh chord played without the 3rd; without the 5th, it is the triad on the ♭7 over the root (B♭/C for C9sus4).

Notes and intervals of C#9sus4

C#9sus4 (C sharp ninth suspended fourth) is built from 5 notes. Each one fills a degree of the chord:

  • C♯ · 1 · root
  • F♯ · 4 · perfect fourth
  • G♯ · 5 · perfect fifth
  • B · ♭7 · minor seventh
  • D♯ · 9 · ninth

Other C sharp chords

Ninth suspended fourth: other roots

Frequently asked questions

How do you play the C#9sus4 chord on guitar?

C#9sus4 (C sharp ninth suspended fourth) has 5 fingerings on this page, from easiest to hardest. Each diagram shows the fingers, the open strings (o) and the strings you do not play (x), and you can hear every shape.

What notes are in C#9sus4?

The notes of C#9sus4 are C♯, F♯, G♯, B, D♯. The formula is 1 · 4 · 5 · ♭7 · 9: root, perfect fourth, perfect fifth, minor seventh, ninth.

What does C#9sus4 mean?

C#9sus4 is the chord symbol for C sharp ninth suspended fourth. A suspended dominant with a ninth: the 4th in place of the 3rd and the 9th on top. Soft and ambiguous, it is one of the most used sounds of modern jazz, soul and gospel. It has the same notes as an eleventh chord played without the 3rd; without the 5th, it is the triad on the ♭7 over the root (B♭/C for C9sus4).

C#9sus4 on other instruments

All guitar chords