Space plays and stops
- Left hand
- Bb2
- Right hand
- D4Ab4Bb4Fb5
- Family
- Drop 2
The Drop 2 IV voicing of Bb7b5 stacks D, Ab, Bb and Fb from the bottom up: the major 3rd, minor 7th, root and flat 5th of the chord.
It's one of the Drop 2 voicings: four-note chords in close position with the second note from the top dropped an octave, played over the root. The others for Bb7b5 are Drop 2 I, Drop 2 II and Drop 2 III.