What is Italian sixth in music?
The Italian sixth (It+6 or It6 or ♯iv6) is derived from iv6 with an altered fourth scale degree, ♯ . This is the only augmented sixth chord comprising just three distinct notes; in four-part writing, the tonic pitch is doubled. The Italian sixth is enharmonically equivalent to an incomplete dominant seventh.
What is a French sixth?
: an augmented sixth chord including a major third and an augmented fourth above the lowest note (such as A-flat–C–D–F-sharp) — compare german sixth , italian sixth — see sixth chord.
How do you resolve an Italian 6th chord?
This chord resolves to V. The notes of the augmented 6th interval resolve outward by half step to make an octave on the 5th scale degree; one tonic note moves to the leading tone, and one to the 2nd scale degree, making a V triad with the root doubled.