Diminished major seventh chord

In music theory, a diminished major seventh chord is a seventh chord composed of a diminished triad and a major seventh. Thus, it is composed of a root note, together with a minor third, a diminished fifth, and a major seventh above the root: (1, ♭3, ♭5, 7). For example, the diminished major seventh chord built on C, commonly written as CoM7, has pitches C–E♭–G♭–B:



Diminished major seventh chords are very dissonant, containing the dissonant intervals of the tritone and the major seventh. They are 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.

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

Diminished major seventh chord table

 * {| class="wikitable"

!Chord !Root !Minor third !Diminished fifth !Major seventh !align=center|CM7 !align=center|C♯M7 !align=center|D♭M7 !align=center|DM7 !align=center|D♯M7 !align=center|E♭M7 !align=center|EM7 !align=center|FM7 !align=center|F♯M7 !align=center|G♭M7 !align=center|GM7 !align=center|G♯M7 !align=center|A♭M7 !align=center|AM7 !align=center|A♯M7 !align=center|B♭M7 !align=center|BM7
 * align=center|C
 * align=center|E♭
 * align=center|G♭
 * align=center|B
 * align=center|C♯
 * align=center|E
 * align=center|G
 * align=center|B♯ (C)
 * align=center|D♭
 * align=center|F♭ (E)
 * align=center|A𝄫 (G)
 * align=center|C
 * align=center|D
 * align=center|F
 * align=center|A♭
 * align=center|C♯
 * align=center|D♯
 * align=center|F♯
 * align=center|A
 * align=center|C𝄪 (D)
 * align=center|E♭
 * align=center|G♭
 * align=center|B𝄫 (A)
 * align=center|D
 * align=center|E
 * align=center|G
 * align=center|B♭
 * align=center|D♯
 * align=center|F
 * align=center|A♭
 * align=center|C♭ (B)
 * align=center|E
 * align=center|F♯
 * align=center|A
 * align=center|C
 * align=center|E♯ (F)
 * align=center|G♭
 * align=center|B𝄫 (A)
 * align=center|D𝄫 (C)
 * align=center|F
 * align=center|G
 * align=center|B♭
 * align=center|D♭
 * align=center|F♯
 * align=center|G♯
 * align=center|B
 * align=center|D
 * align=center|F𝄪 (G)
 * align=center|A♭
 * align=center|C♭ (B)
 * align=center|E𝄫 (D)
 * align=center|G
 * align=center|A
 * align=center|C
 * align=center|E♭
 * align=center|G♯
 * align=center|A♯
 * align=center|C♯
 * align=center|E
 * align=center|G𝄪 (A)
 * align=center|B♭
 * align=center|D♭
 * align=center|F♭ (E)
 * align=center|A
 * align=center|B
 * align=center|D
 * align=center|F
 * align=center|A♯
 * }