Diminished major seventh chord

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Diminished major seventh chord. About this soundPlay 
diminished major seventh
Component intervals from root
major seventh
diminished fifth (tritone)
minor third
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. It is nevertheless 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[edit]

Chord Root Minor third Diminished fifth Major seventh
CoM7 C E G B
CoM7 C E G B (C)
DoM7 D F (E) Adouble flat (G) C
DoM7 D F A C
DoM7 D F A Cdouble sharp (D)
EoM7 E G Bdouble flat (A) D
EoM7 E G B D
FoM7 F A C (B) E
FoM7 F A C E (F)
GoM7 G Bdouble flat (A) Ddouble flat (C) F
GoM7 G B D F
GoM7 G B D Fdouble sharp (G)
AoM7 A C (B) Edouble flat (D) G
AoM7 A C E G
AoM7 A C E Gdouble sharp (A)
BoM7 B D F (E) A
BoM7 B D F A


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