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- Left hand
- D3F3Ab3D4
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- Triads
The Doubled Root voicing of Ddim stacks D, F, Ab and D from the bottom up: the root, minor 3rd, flat 5th and root of the chord.
It's one of the Triads voicings. The others for Ddim are Root Inversion, 1st Inversion and 2nd Inversion.