A#m9 chord
The A-sharp minor ninth chord (abbreviated "A#m9 chord") is a five-note chord consisting of the notes A♯, C♯, E♯, G♯, and B♯. The chord is formed by adding a major ninth to a A-sharp minor seventh chord.
In practice, the fifth (E♯) is sometimes omitted from the A#m9 chord because it's not always possible to play all notes simultaneously.
Name
A-sharp minor ninth chord
Notes
A♯ C♯ E♯ G♯ B♯
Intervals
1 ♭3 5 ♭7 9
Chord symbol
A♯m9
Alternative symbols
A♯–9 A♯mi9 A♯min9
Type
Pentad (five-note chord)