Space plays and stops
- Left hand
- Bb2
- Right hand
- Ab3C4Eb4F4
- Family
- 4-Note Rootless (Type A/B)
The Type B voicing of Bb9sus4 stacks Ab, C, Eb and F from the bottom up: the minor 7th, 9th, 4th 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 Bb9sus4 is Type A.