Voicing of Ab Dominant 7 sus4 b9

Rooted Guide Tones II

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Left hand
Ab2Gb3Db4
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Rooted Guide Tones

The Rooted Guide Tones II voicing of Ab7susb9 stacks Ab, Gb and Db from the bottom up: the root, minor 7th and 4th of the chord.

It's one of the Rooted Guide Tones voicings: the root, 3rd and 7th in the left hand, as bebop pianists comped. The other for Ab7susb9 is Rooted Guide Tones I.