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Daug7♭9/C is the D augmented 7th flat 9th / C (3rd inversion) guitar chord with C in the bass. It uses the notes D, F♯, A♯, C, and E♭ and the interval formula 1-3-♯5-♭7-♭9.
The D augmented 7th flat 9th augmented 7th flat 9th chord blends the augmented triad with a minor seventh and flat ninth E♭, producing a complex, dramatic tension. Its dissonant, unresolved sound is ideal for jazz and film scoring. With C in the bass, this voicing functions as the 3rd inversion of D augmented 7th flat 9th.
Also written as Daug7♭9, D7♯5♭9/C, D+7♭9/C, and D7+5♭9/C.
These are quick-start shapes for players who want the answer first and the deeper theory second.
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Each note below shows how the chord is built from its root. This is the theory layer underneath the fretboard shapes.
The root anchors the chord and defines its tonal center.
This note defines the chord's major quality and brings brightness to the sound.
The raised fifth adds lift, drama, and a more unsettled color.
The minor seventh adds bluesy or jazzy tension that wants to move onward.
The flat ninth adds sharper tension and a more dramatic clash.
Every shape is shown with its diagram and exact fingering instructions.
Daug7♭9/C uses the notes D, F♯, A♯, C, and E♭. Its interval formula is 1-3-♯5-♭7-♭9.
Daug7♭9/C is also written as Daug7♭9, D7♯5♭9/C, D+7♭9/C, and D7+5♭9/C.
Place the 1st finger on the 1st fret of the 4th string. Place the 2nd finger on the 2nd fret of the 1st string. Place the 3rd finger on the 3rd fret of the 5th string. Place the 4th finger on the 3rd fret of the 2nd string and 3rd string in barre position. Strum from the 5th string down.
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