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]

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]

References

^ Reisberg, Horace (1975). "The Vertical Dimension in Twentieth Century Music", p.371, Aspects of Twentieth-Century Music, chap. 5, p.362-72. Wittlich, Gary (ed.). Englewood Cliffs, New Jersey: Prentice-Hall. ISBN 0-13-049346-5.
^ ^a ^b ^c Reisberg (1975), p.362.

Chords

By type

Triad	Major Minor Augmented Diminished Suspended

Seventh	Major Minor Dominant Dominant seventh flat five Diminished Half-diminished Diminished major Minor-major Augmented major Augmented minor Nondominant Harmonic seventh chord

Extended	Ninth Eleventh Thirteenth Upper structure

Added / omitted	Sixth Minor sixth Augmented sixth Power chord Lydian chord Seven six chord

By function

Diatonic	Tonic Dominant Subdominant Supertonic Mediant Submediant Leading / Subtonic

Altered	Approach Borrowed Chromatic mediant Neapolitan chord Passing

Secondary	Secondary dominant Secondary leading-tone Secondary supertonic

With names

Other