Mixed-interval chord

In music a mixed-interval chord is a chord not characterized by one consistent interval. Chords characterized by one consistent interval, or primarily but with alterations, are equal-interval chords. Mixed interval chords "lend themselves particularly" to atonal music since they tend to be dissonant.^[2]

Interval cycles: C1–C4 and C6; feature equal-intervals.

Mixed-interval chords from the opening to Arnold Schoenberg's Klavierstück Op. 33a^[1] (Play^ⓘ).

Equal-interval chords are often of indeterminate root and mixed-interval chords are also often best characterized by their interval content.^[2] "Equal-interval chords are often altered to make them 'impure' as in the case of quartal and quintal chords with tritones, chords based on seconds with varying intervals between the seconds."^[2]