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- Left hand
- Ab2B2D3F3
- Family
- 4-Note Rooted
The Rooted IV voicing of Bdim7 stacks Ab, B, D and F from the bottom up: the diminished 7th, root, minor 3rd and flat 5th of the chord.
It's one of the 4-Note Rooted voicings: four-note voicings with the root on the bottom or inside, in the left hand. The others for Bdim7 are Rooted I, Rooted II and Rooted III.