x 1 2 1 2 x
A#m7b5
A# half-diminished (m7b5)
Notes: A# · C# · E · G#
More common: Bbm7b5
Triads
Suspended
Sevenths
Extensions
Drag the file into your recording program (DAW). It plays the guitar's real notes.
Common shapes (3)
6 x 6 6 5 x
x x 8 9 9 9
Other shapes (19)
Showing 12 of 19
x 1 2 1 2 0
6 7 6 6 x x
x x 8 6 9 0
6 x 6 6 5 0
6 7 6 6 x 0
6 4 6 x 5 0
6 4 6 6 x 0
6 4 6 3 x 0
x 1 2 x 2 4
x 1 2 1 2 4
6 x 6 6 9 0
6 7 x 6 9 0
About A#m7b5
A#m7b5 is built from four notes: A# (root), C# (minor third), E (diminished fifth) and G# (minor seventh). In scale degrees above the root, the formula is 1 – b3 – b5 – b7. It is the chord on the seventh degree of the major scale (viiø7) and the usual chord on the second degree of minor progressions in jazz (iiø7, V7, i).
A#m7b5 has 3 common voicings, based on the A, E and D shapes of the CAGED system. There are 19 more voicings sorted by difficulty; use the viewer switches to add inversions and stretches. Another way to write A#m7b5 is Bbm7b5 (the same piano key, with a different name). The usual choice is Bbm7b5.