Added sixth chord (Fr. sixte ajouté).
(Fr. sixte ajouté).
In functional harmony a subdominant chord with an added major 6th above the bass (e.g. f–a–c′–d′ in C major, f–a♭–c′–d′ in C minor); it can also be derived as the first inversion of a 7th chord built on the supertonic. The ambivalent construction of the added 6th chord engenders an ambivalence in the way it resolves, as Rameau observed in the ...