A "six-five chord" is a type of musical chord that typically consists of a root note, a third, and a sixth above the bass note. It is often used in harmony to create a sense of movement or tension. The term "six-five" refers to the intervals between the notes, specifically the sixth and fifth above the bass note. In music theory, the six-five chord is commonly found in classical music and jazz, where it can serve as a passing chord or a way to connect other chords. It is often notated as a fraction, with the number six indicating the interval above the bass and the number five indicating the interval above the root.