How do you write augmented sixth chord in German?
The half-diminished seventh chord is the inversion of the German sixth chord (it is its inversion as a set, rather than as a chord). Its interval of minor seventh (between root and seventh degree (i.e.: C–B♭ in C–E♭–G♭–B♭) can be written as an augmented sixth (C–E♭–G♭–A♯).
What is a German augmented sixth chord?
The German sixth chord is built on the fourth degree. It is a seventh chord. It is most commonly in the first inversion. Its root is raised in order to create an augmented sixth interval with the bass: German Sixth, A minor.