Voicing of B Half Diminished

Rooted I

Back to Bm7b5

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Left hand
B2D3F3A3
Family
4-Note Rooted

The Rooted I voicing of Bm7b5 stacks B, D, F and A from the bottom up: the root, minor 3rd, flat 5th and minor 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 other for Bm7b5 is Rooted II.