Root : D
4th : G
5th : A
Dominant 7th : C
9th : E
D9sus4
Contains a G as the bass note.
Notated as D/G
D9sus4/G
Contains an A as the bass note.
Notated as D/A
D9sus4/A
Contains an E as the bass note.
Notated as D/E
D9sus4/E
A jazz sus chord or dominant 9sus4 chord is a seventh chord on the fifth scale degree of the key with a suspended fourth and an added ninth. Functionally, it can be written as V9sus4 or V7sus9.