The D-sharp dominant minor ninth chord (abbreviated "D#7(b9) chord") is a five-note chord consisting of the notes D, F, A, C, and E. The chord is formed by adding a major ninth to a D-sharp dominant seventh chord.

In practice, the fifth (A) is often omitted from the D#7(b9) chord because it's not always possible to play all notes simultaneously.

Name
D-sharp dominant minor ninth chord
Notes
D F A C E
Intervals
1 3 5 7 9
Chord symbol
D7(b9)
Alternative symbol
D7b9
Type
pentad (five-note chord)

D#7(b9) chord on piano

D#7(b9) chord on guitar

D#7(b9) chord on ukulele

D#7(b9) chord on the staff