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C♯aug9

C♯ Augmented 9th · 4 fingerings

The augmented ninth pairs a raised fifth with the ninth, making C♯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.
3fr214
C♯aug9 · position 1 · fret 3
7fr4213
C♯aug9 · position 2 · fret 7
8fr1234
C♯aug9 · position 3 · fret 8
9fr1423
C♯aug9 · position 4 · fret 9