C7sus(9) = Csus9 Chord on Guitar

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Sus chords [3rd suspended and replaced by a 4th or 2nd]

Csus4Csus2C7sus4C7sus4(9)C7sus4(b9)C7sus4(13)

Diminished and Half-Diminished chords [minor chords with diminished 5th (b5) ]

Cdim7Cdim7(b13)

Augmented chords [major chords with augmented 5th (#5) ]

Caug

Slash Chords [chords with a bassnote different from the root]

C/DC/EC/FC/GC/BbC/BCm/EbCm/FCm/GCm/BbC7/EC7/GC7/BbCmaj7/BCm7/GCm7(b5)/Gb

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Csus9 chord. The full formula C7sus4(9) can be seen as “analytic notation” that shows all the chords ingredients, but normally you'll just write Csus9 or C9sus. Very common and important chord in pop and soul music. Csus9 will often replace the dominant 7th chord C7.

The sus9 chord is a 7sus4 chord with an additional 9th. You can get the 9th by going up a major second (= 1 whole-step = 2 frets) from a root C to D. It will be written as 9 and not as 2, because it extends the chord rather than modifying the basic structure of root, 3rd and 5th (like in a sus2 chord, where the 2 replaces the 3rd and therefore is notated as 2 together with the abbreviation sus).

The Csus9 chord contains the tones C (1), F (4), G (5), Bb (7) and D (9). Because the 5th is often omitted in this chord, you can consider and notate it as slash chord: instead of Csus9 you can write Bb/C, a Bb major chord (consisting of Bb, D and F) over the bass note C.

Example chord progressions:
F F/A Bbmaj7 Csus9
Dm7 G7 Csus9 F
Dm7 Am7 Bb Csus9

must know

You should memorize these chords, if you are using this chord type frequently.

C
C7sus(9) = Csus9 Chord on Guitar, voicing 1-7-9-4
C
C7sus(9) = Csus9 Chord on Guitar, voicing 1-7-9-4

moveable

You can transpose these chord shapes to any different key just by moving the whole chord shape along the guitar fretboard until the squared spot represents the new root.

C
C7sus(9) = Csus9 Chord on Guitar, voicing 1-7-9-4
C
C7sus(9) = Csus9 Chord on Guitar, voicing 1-7-9-4-1
C
C7sus(9) = Csus9 Chord on Guitar, voicing 1-7-9-4
C
C7sus(9) = Csus9 Chord on Guitar, voicing 1-7-9-4-7
C
C7sus(9) = Csus9 Chord on Guitar, voicing 1-7-9-4-1
C
C7sus(9) = Csus9 Chord on Guitar, voicing 1-9-4-7-1
C
C7sus(9) = Csus9 Chord on Guitar, voicing 1-9-4-7
C
C7sus(9) = Csus9 Chord on Guitar, voicing 1-4-7-9

capodaster

The pleasant sound and sometimes easier playability of an open chord can be put into practice by mounting a capodaster on the indicated fret. Of course that may goe along with the disadvantage of not being able to use the frets lower than the capo anymore.

C
C7sus(9) = Csus9 Chord on Guitar, voicing 1-7-9-1-4
C
C7sus(9) = Csus9 Chord on Guitar, voicing 1-7-9-4-4
C
C7sus(9) = Csus9 Chord on Guitar, voicing 1-7-4-9-5
C
C7sus(9) = Csus9 Chord on Guitar, voicing 1-9-4-5-1
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