A♭aug7
A♭ Augmented 7th · 4 fingerings
Also written 7♯5, the augmented seventh raises the fifth of a dominant chord, so A♭aug7 carries the pull of a dominant plus the instability of an augmented triad. It's a strong jazz turnaround chord and a favourite of composers wanting a dominant that sounds distinctly unsettled. Sits naturally over whole-tone material.
A♭aug7 · position 1 · fret 4
A♭aug7 · position 2 · fret 6
A♭aug7 · position 3 · fret 9
A♭aug7 · position 4 · fret 11