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- Left hand
- Bb2Db3Fb3Abb3
- Family
- 4-Note Rooted
The Rooted I voicing of Bbdim7 stacks Bb, Db, Fb and Abb from the bottom up: the root, minor 3rd, flat 5th and diminished 7th 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 Bbdim7 are Rooted II, Rooted III and Rooted IV.