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In 
For example, the progression Fmaj7–Amaj7–Dmaj7–Gmaj7–C13sus4 contains four
jazz
Jazz is a music genre that originated in the African-American communities of New Orleans, Louisiana in the late 19th and early 20th centuries, with its roots in blues and ragtime. Since the 1920s Jazz Age, it has been recognized as a major ...
, a constant structure is a chord progression
In a musical composition, a chord progression or harmonic progression (informally chord changes, used as a plural) is a succession of chords. Chord progressions are the foundation of harmony in Western musical tradition from the common practice ...
consisting of three or more chords
Chord may refer to:
* Chord (music), an aggregate of musical pitches sounded simultaneously
** Guitar chord a chord played on a guitar, which has a particular tuning
* Chord (geometry), a line segment joining two points on a curve
* Chord (as ...
of the same type or quality.Rawlins, Robert (2005). ''Jazzology: The Encyclopedia of Jazz Theory for All Musicians'', p.131. . Popularized by pianists Bill Evans
William John Evans (August 16, 1929 – September 15, 1980) was an American jazz pianist and composer who worked primarily as the leader of his trio. His use of impressionist harmony, interpretation of traditional jazz repertoire, block ch ...
and Herbie Hancock
Herbert Jeffrey Hancock (born April 12, 1940) is an American jazz pianist, keyboardist, bandleader, and composer. Hancock started his career with trumpeter Donald Byrd's group. He shortly thereafter joined the Miles Davis Quintet, where he help ...
, the combination of functional
Functional may refer to:
* Movements in architecture:
** Functionalism (architecture)
** Form follows function
* Functional group, combination of atoms within molecules
* Medical conditions without currently visible organic basis:
** Functional sy ...
and nonfunctional chords provides cohesiveness while producing a free and shifting tonal center
In music, the tonic is the first scale degree () of the diatonic scale (the first note of a scale) and the tonal center or final resolution tone that is commonly used in the final cadence in tonal (musical key-based) classical music, popular ...
.
For example, the progression Fmaj7–Amaj7–Dmaj7–Gmaj7–C13sus4 contains four major seventh chord
In music, a major seventh chord is a seventh chord in which the third is a major third above the root and the seventh is a major seventh above the root. The major seventh chord, sometimes also called a ''Delta chord'', can be written as maj7, M7, , ...
s (and one thirteenth chord
In music or music theory, a thirteenth is the note thirteen scale degrees from the root of a chord and also the interval between the root and the thirteenth. The interval can be also described as a compound sixth, spanning an octave pl ...
), none of which are diatonic
Diatonic and chromatic are terms in music theory that are most often used to characterize Scale (music), scales, and are also applied to musical instruments, Interval (music), intervals, Chord (music), chords, Musical note, notes, musical sty ...
to the key
Key or The Key may refer to:
Common meanings
* Key (cryptography), a piece of information that controls the operation of a cryptography algorithm
* Key (lock), device used to control access to places or facilities restricted by a lock
* Key (map ...
of F major except the first.
In contrast, the vi–ii–V–I or circle progression
A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the centre. Equivalently, it is the curve traced out by a point that moves in a plane so that its distance from a given point is const ...
from classical theory contains four chords of two or three different qualities: major, minor, and possibly a dominant seventh chord
In music theory, a dominant seventh chord, or major minor seventh chord, is a seventh chord, usually built on the fifth degree of the major scale, and composed of a root, major third, perfect fifth, and minor seventh. Thus it is a major triad tog ...
; all of which, however, are diatonic to the key. Thus diversity is achieved within a stable and fixed tonal center.
See also
*Parallel harmony
In music, parallel harmony, also known as harmonic parallelism, harmonic planing or parallel voice leading, is the parallel movement of two or more melodies (see voice leading).
Illustrative example
Lines with parallel harmony can be viewed as ...
*Side-slipping
In jazz improvisation, outside playing describes an approach where one plays over a scale, mode or chord that is harmonically distant from the given chord. There are several common techniques to playing outside, that include side-stepping or ...
References