Space plays and stops
- Left hand
- Bb2
- Right hand
- Ab3C4Db4F4
- Family
- 4-Note Rootless (Type A/B)
The Type B voicing of Bbm9 stacks Ab, C, Db and F from the bottom up: the minor 7th, 9th, minor 3rd and 5th of the chord. It leaves out the root, Bb, 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 Bbm9 is Type A.