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A♭aug9

A♭ Augmented 9th · 4 fingerings

The augmented ninth pairs a raised fifth with the ninth, making A♭aug9 a bright but distinctly unstable dominant. Jazz and fusion players reach for it as a V chord with extra bite, and it works well where a plain ninth sounds too comfortable. Expect it to resolve rather than to sit still.
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A♭aug9 · position 1
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A♭aug9 · position 2 · fret 3
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A♭aug9 · position 3 · fret 4
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A♭aug9 · position 4 · fret 10