Space plays and stops
- Left hand
- A#2
- Right hand
- C#4E4G#4B#4
- Family
- 4-Note Rootless (Type A/B)
The Type A voicing of A#m7b5 stacks C#, E, G# and B# from the bottom up: the minor 3rd, flat 5th, minor 7th and 9th of the chord. It leaves out the root, A#, for the left hand or the bass player to take.
It's one of the 4-Note Rootless (Type A/B) voicings: four-note rootless voicings in their two forms, with the 3rd or the 7th on the bottom, played over the root. The other for A#m7b5 is Type B.