Root : A#
4th : D#
5th : F
Dominant 7th : G#
9th : C
A#9sus4
Contains a D# as the bass note.
Notated as A#/D#
A#9sus4/D#
Contains an F as the bass note.
Notated as A#/F
A#9sus4/F
Contains a C as the bass note.
Notated as A#/C
A#9sus4/C
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.