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A♯aug7♭9/B guitar shapes

Popular fretboard positions with fingering suggestions

Showing 6 of 6 playable shapes

About the chord

A♯ augmented 7th flat 9th / B (4th inversion)

The A♯ augmented 7th flat 9th augmented 7th flat 9th chord blends the augmented triad with a minor seventh and flat ninth B, producing a complex, dramatic tension. Its dissonant, unresolved sound is ideal for jazz and film scoring. With B in the bass, this voicing functions as the 4th inversion of A♯ augmented 7th flat 9th.

Root note: A♯
Bass note: B
Chord tones: 5
Playable shapes: 6

Chord tones

A♯C𝄪E𝄪G♯B

Notes & Intervals

Each note below shows how the chord is built from its root. This is the theory layer underneath the fretboard shapes.

A♯ Unison (Root) 1

The root anchors the chord and defines its tonal center.

C𝄪 Major Third 3

This note defines the chord's major quality and brings brightness to the sound.

E𝄪 Augmented Fifth ♯5

The raised fifth adds lift, drama, and a more unsettled color.

G♯ Minor Seventh ♭7

The minor seventh adds bluesy or jazzy tension that wants to move onward.

B Minor Ninth ♭9

The flat ninth adds sharper tension and a more dramatic clash.

Related Articles

Articles that reference this chord and explain how to use it in your playing.