Augmented major seventh chord

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augmented major seventh chord
Component intervals from root
major seventh
augmented fifth
major third
root
Forte no. / Complement
4-19 / 8-19

In music, an augmented major seventh chord, or major seventh sharp five chord, or simply augmented seventh chord[1] 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 augM7, +M7, +Δ7, M75, M7(5), M7/5, M7+5, maj+7, Δ+7, etc. For example, the augmented major seventh chord built on C, written as CaugM7, has pitches C–E–G–B:


{
\override Score.TimeSignature #'stencil = ##f
\relative c' {
   \clef treble 
   \time 4/4
   \key c \major
   <c e gis b>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[2] (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.[3] For example, in the key of A minor, C maj75 usually resolves to F.

Augmented major seventh chord table[edit]

Chord Root Major third Augmented fifth Major seventh
CaugM7 C E G B
CaugM7 C E (F) Gdouble sharp (A) B (C)
DaugM7 D F A C
DaugM7 D F A C
DaugM7 D Fdouble sharp (G) Adouble sharp (B) Cdouble sharp (D)
EaugM7 E G B D
EaugM7 E G B (C) D
FaugM7 F A C E
FaugM7 F A Cdouble sharp (D) E (F)
GaugM7 G B D F
GaugM7 G B D F
GaugM7 G B (C) Ddouble sharp (E) Fdouble sharp (G)
AaugM7 A C E G
AaugM7 A C E (F) G
AaugM7 A Cdouble sharp (D) Edouble sharp (F) Gdouble sharp (A)
BaugM7 B D F A
BaugM7 B D Fdouble sharp (G) A

See also[edit]

Sources[edit]

  1. ^ Sarnecki, Mark (2010). Intermediate Harmony, p.59. Second edition. ISBN 978-1-55440-271-7
  2. ^ Coker, Jerry (1976). The Jazz Idiom, p.66. ISBN 0-13-509851-3.
  3. ^ Benward & Saker (2003), p.232.