Minor major seventh chord
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A minor/major seventh chord (written m/M7, minor major seventh and *lowercase root name*M7, such as am/M7) is a naturally occurring diatonic chord in the harmonic minor scale. The chord is built on a root, and above that the intervals of a minor third, a major third above that note and above that a major third. It can also be viewed as taking a minor triad and adding a major seventh. The traditional numeral notation is based on the degrees of the major scale, and by this notation a minor/major seventh chord is degrees 1, ♭3, 5, 7 of the major scale. E.g. cm/M7 chord constitutes of notes C, E♭, G, B.
The chord occurs on the tonic when harmonizing the harmonic minor scale in 7th chords. The harmonic minor scale contains a raised seventh, creating a half step between the seventh and the root. This half step creates a pull to the tonic that is useful in harmonic context and is not present in the natural minor scale (also known as the Aeolian mode). When building a chord on the fifth or the seventh of the minor scale, this raised seventh is present, and so both of these chords have a strong pull to the tonic. However, this same effect makes the tonic seventh highly unstable. The raised seventh in conjunction with the tonic creates the dissonant interval of a minor second. The raised seventh creates a pull towards tonic, however since it is present in the tonic minor chord this pull creates dissonance.
The minor/major seventh chord is most often used in jazz, typically functioning as a minor tonic. Jazz musicians usually improvise with the melodic minor scale over this chord; the harmonic minor scale is also used. The minor/major seventh chord is also used in the song "Us and Them" by Pink Floyd.
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| By Type | Triad | Major · Minor · Augmented · Diminished · Suspended |
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| Seventh | Major · Minor · Dominant · Diminished · Half-diminished · Minor-major · Augmented major · Augmented minor | |
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| Extended | Ninth · Eleventh · Thirteenth | |
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| Other | Sixth · Augmented sixth · Altered · Added tone · Polychord · Quartal and quintal · Tone cluster · Power | |
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| By Function | Diatonic | Tonic · Dominant · Subdominant · Submediant |
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| Altered | Borrowed · Neapolitan chord · Secondary dominant | |
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| With Names | Elektra chord · Hendrix chord · Mystic chord · Petrushka chord · Tristan chord · So What chord | |
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