D#7(b9) chord
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
D♯7(b9)
Alternative symbol
D♯7b9
Type
pentad (five-note chord)