A#maj9 chord
The A-sharp major ninth chord (abbreviated "A#maj9 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 major seventh chord.
In practice, the fifth (E♯) is sometimes omitted from the A#maj9 chord because it's not always possible to play all notes simultaneously.
Name
A-sharp major ninth chord
Notes
A♯ C E♯ G B♯
Intervals
1 3 5 7 9
Chord symbol
A♯maj9
Alternative symbols
A♯▵9 A♯ma9 A♯MA9 A♯M9
Type
Pentad (five-note chord)