D#9 chord
The D-sharp dominant ninth chord (abbreviated "D#9 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 sometimes omitted from the D#9 chord because it's not always possible to play all notes simultaneously.
Name
D-sharp dominant ninth chord
Notes
D♯ F A♯ C♯ E♯
Intervals
1 3 5 ♭7 9
Chord symbol
D♯9
Type
Pentad (five-note chord)