A#13 chord
The A-sharp dominant thirteenth chord (abbreviated "A#13 chord") is a seven-note chord consisting of the notes A♯, C, E♯, G♯, B♯, D♯, and F. The chord is formed by adding a thirteenth to a A-sharp dominant eleventh chord.
In practice, the fifth (E♯) and eleventh (D♯) are often omitted from the A#13 chord to avoid a very dissonant sound, and because it's not always possible to play all notes simultaneously.
Name
A-sharp dominant thirteenth chord
Notes
A♯ C E♯ G♯ B♯ D♯ F
Intervals
1 3 5 ♭7 9 11 13
Chord symbol
A♯13
Type
Heptad (seven-note chord)