Component intervals from root | |
---|---|
major seventh | |
diminished fifth (tritone) | |
minor third | |
root | |
Forte no. / | |
4-18 / |
In music theory, a diminished major seventh chord is a seventh chord composed of a diminished triad and a major seventh.[1] 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. It is nevertheless infrequently used as a chord in itself.
The chord can be represented by the integer notation {0, 3, 6, 11}.
Chord | Root | Minor third | Diminished fifth | Major seventh |
---|---|---|---|---|
CoM7 | C | E♭ | G♭ | B |
C♯oM7 | C♯ | E | G | B♯ (C) |
D♭oM7 | D♭ | F♭ (E) | A![]() |
C |
DoM7 | D | F | A♭ | C♯ |
D♯oM7 | D♯ | F♯ | A | C![]() |
E♭oM7 | E♭ | G♭ | B![]() |
D |
EoM7 | E | G | B♭ | D♯ |
FoM7 | F | A♭ | C♭ (B) | E |
F♯oM7 | F♯ | A | C | E♯ (F) |
G♭oM7 | G♭ | B![]() |
D![]() |
F |
GoM7 | G | B♭ | D♭ | F♯ |
G♯oM7 | G♯ | B | D | F![]() |
A♭oM7 | A♭ | C♭ (B) | E![]() |
G |
AoM7 | A | C | E♭ | G♯ |
A♯oM7 | A♯ | C♯ | E | G![]() |
B♭oM7 | B♭ | D♭ | F♭ (E) | A |
BoM7 | B | D | F | A♯ |