Jazz minor scale

The jazz minor scale is a derivative of the melodic minor scale, except only the ascending form of the scale is used. As the name implies, it is primarily used in jazz. It may be derived from the major scale with a minor third,[1] making it a synthetic scale, and features a dominant seventh chord on the fifth degree (V) like the harmonic minor scale.[2]

Thus, the jazz minor scale can be represented by the following notation:

1, 2, ♭3, 4, 5, 6, 7, 8

The scale may be considered to originate in the use of extensions beginning with the seventh in jazz and thus the necessity to, "chromatically raise the diatonic 7th to create a stable, tonic sound," rather than use a minor seventh chord, associated with ii, for tonic.[3]

The jazz minor scale contains all of the altered notes of the dominant seventh chord whose root is a semitone below the scale's tonic: "In other words to find the correct jazz minor scale for any dominant 7th chord simply use the scale whose tonic note is a half step higher than the root of the chord."[1] For example, the G⁷ chord and A♭ jazz minor scale: the A♭ scale contains the root, third, seventh, and the four most common alterations of G⁷. This scale may be used to resolve to C in the progression G⁷–C (over G⁷, which need not be notated G^{7♭5♯5♭9♯9}).[1]

Jazz minor scale on A♭ with notes related to G⁷ chord alterations. Play 

A♭ jazz minor scale over G⁷ resolving to C.[1] Play 

It is used over a minor major seventh chord.[4] See: chord-scale system. The scale also easily allows diatonic chord progressions, for example a I−vi−ii−V progression:[4]

|: CmM7

Am7♭5

| Dm7

G7♭13

:|

Play

Its modes also include Lydian ♯5, Lydian ♭7, Locrian ♮2, and the altered scale.