Diminished major seventh chord

Diminished major seventh chord.

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diminished major seventh
Component intervals from root
major seventh
diminished fifth (tritone)
minor third
root
Forte no. / Complement
4-18 / 8-18

In music theory, a diminished major seventh chord is a chord composed of a diminished triad and a major seventh.^[1] Thus it is composed of a root, minor third, diminished fifth (tritone) and major seventh. It is very dissonant, containing the dissonant intervals of the tritone and the major seventh. It is frequently encountered, especially in jazz, as a diminished seventh chord with an appoggiatura, especially when the melody has the leading note of the given chord: the ability to resolve this dissonance smoothly to a diatonic triad with the same root allows it to be used as a temporary tension before tonic resolution. However, it is infrequently used as a chord in itself.

The chord can be represented by the integer notation {0, 3, 6, 11}.

Diminished major seventh chord table

Chord	Root	Minor third	Diminished fifth	Major seventh
C^omaj7	C	E♭	G♭	B
C♯^omaj7	C♯	E	G	B♯ (C)
D♭^omaj7	D♭	F♭ (E)	A (G)	C
D^omaj7	D	F	A♭	C♯
D♯^omaj7	D♯	F♯	A	C (D)
E♭^omaj7	E♭	G♭	B (A)	D
E^omaj7	E	G	B♭	D♯
F^omaj7	F	A♭	C♭ (B)	E
F♯^omaj7	F♯	A	C	E♯ (F)
G♭^omaj7	G♭	B (A)	D (C)	F
G^omaj7	G	B♭	D♭	F♯
G♯^omaj7	G♯	B	D	F (G)
A♭^omaj7	A♭	C♭	E (D)	G
A^omaj7	A	C	E♭	G♯
A♯^omaj7	A♯	C♯	E	G (A)
B♭^omaj7	B♭	D♭	F♭ (E)	A
B^omaj7	B	D	F	A♯

↑ Jamini, Deborah. (2005). Harmony And Composition: Basics to Intermediate, p.204. ISBN 978-1-4120-3333-6.

By form

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 Altered seventh Nondominant Harmonic seventh

Extended	Ninth Eleventh Thirteenth Upper structure Dominant 7♯9 Polychord Tone cluster

Added / omitted	Sixth Augmented sixth Lydian Seven six

Specific	Alpha Bridge Complexe sonore Dream Elektra Farben Grandmother Magic µ Mystic Northern lights Petrushka Psalms So What Tristan Viennese trichord

General	Mixed interval Secundal Tertian Quartal Synthetic chord

Diatonic	Tonic Dominant Subdominant Supertonic Mediant Submediant Leading / Subtonic

Altered	Approach Borrowed Chromatic mediant Neapolitan Passing

Secondary	Secondary dominant Secondary leading-tone Secondary supertonic

Other	Common Contrast Primary triad Subsidiary

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