Voicing of Bb Dominant b5

Rooted II

Back to Bb7b5

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Left hand
Fb3Ab3Bb3D4
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4-Note Rooted

The Rooted II voicing of Bb7b5 stacks Fb, Ab, Bb and D from the bottom up: the flat 5th, minor 7th, root and major 3rd 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 other for Bb7b5 is Rooted I.