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Augmented major seventh chord

From Wikipedia, the free encyclopedia
augmented major seventh chord
Component intervals from root
major seventh
augmented fifth
major third
root
Tuning
16:20:25:30
Forte no. / Complement
4-19B / 8-19

In music, an augmented major seventh chord or major seventh sharp five chord is a seventh chord composed of a root, major third, augmented fifth, and major seventh (1, 3, ♯5, 7). It can be viewed as an augmented triad with an additional major seventh. When using popular-music symbols, it is denoted by e.g. +Δ7. For example, the augmented major seventh chord built on A♭, written as e.g. A♭+Δ7, has pitches A♭-C-E-G:

{ \override Score.TimeSignature #'stencil = ##f \relative c' { \clef treble \time 4/4 \key c \major <as c e g>1 } }

The chord can be represented by the integer notation {0, 4, 8, 11}.

The augmented major seventh chord is associated with the augmented scale[1] (see jazz scale and chord-scale system). This chord also comes from the third mode of both the harmonic minor and the melodic minor scales. For example, the third mode of the A melodic minor scale outlines an augmented major seventh chord, as shown below.

{ \override Score.TimeSignature #'stencil = ##f \relative c' { \clef treble \time 7/4 \key a \minor \once \override NoteHead.color = #red c4^\markup { "3rd mode of A melodic minor scale" } d \once \override NoteHead.color = #red e fis \once \override NoteHead.color = #red gis a \once \override NoteHead.color = #red b c2 } }

As with dominant seventh chords, nondominant seventh chords including the augmented major seventh usually progress according to the circle, thus III+M7 resolves to vi or VI.[2] For example, in the key of A minor, C maj7♯5 usually resolves to F.

Augmented major seventh chord table

[edit]
Chord Root Major third Augmented fifth Major seventh
C♭augM7 C♭ E♭ G B♭
CaugM7 C E G♯ B
C♯augM7 C♯ E♯ (F) Gdouble sharp (A) B♯ (C)
D♭augM7 D♭ F A C
DaugM7 D F♯ A♯ C♯
D♯augM7 D♯ Fdouble sharp (G) Adouble sharp (B) Cdouble sharp (D)
E♭augM7 E♭ G B D
EaugM7 E G♯ B♯ (C) D♯
E♯augM7 E♯ Gdouble sharp (A) Bdouble sharp (C♯) Ddouble sharp (E)
F♭augM7 F♭ A♭ C E♭
FaugM7 F A C♯ E
F♯augM7 F♯ A♯ Cdouble sharp (D) E♯ (F)
G♭augM7 G♭ B♭ D F
GaugM7 G B D♯ F♯
G♯augM7 G♯ B♯ (C) Ddouble sharp (E) Fdouble sharp (G)
A♭augM7 A♭ C E G
AaugM7 A C♯ E♯ (F) G♯
A♯augM7 A♯ Cdouble sharp (D) Edouble sharp (F♯) Gdouble sharp (A)
B♭augM7 B♭ D F♯ A
BaugM7 B D♯ Fdouble sharp (G) A♯
B♯augM7 B♯ Ddouble sharp (E) Ftriple sharp (G♯) Adouble sharp (B)

See also

[edit]

References

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  1. ^ Coker, Jerry (1976). The Jazz Idiom, p.66. ISBN 0-13-509851-3.
  2. ^ Benward & Saker (2003), p.232.
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