Dominant seventh flat five chord

From Wikipedia, the free encyclopedia
Jump to: navigation, search
dominant seventh flat five chord
Component intervals from root
minor seventh
diminished fifth (tritone)
major third
root
Forte no. / Complement
4-25 / 8-25
Dominant seventh flat five chord on C (C75). About this sound Play 

In music theory, the dominant seventh flat five chord is a seventh chord composed of a root note, together with a major third, a diminished fifth and a minor seventh from root (1, 3, 5 and 7). For example, the dominant seventh flat five built upon C (C75) would be C–E–G–B. It can be represented by the integer notation {0, 4, 6, 10}. In diatonic harmony, the dominant seventh flat five chord does not naturally occur on any scale degree (as does, for example, the dominant seventh on the fifth scale degree: C7 in F major). This chord is enharmonically equivalent to its own second inversion.

Lydian dominant scale on C About this sound Play . F = G.

The dominant seventh flat five may be considered an altered chord, created by diminishing the fifth of a dominant seventh chord, and may use the whole-tone scale,[1] as may the augmented minor seventh chord, or the Lydian 7 mode,[2] as well as most of the modes of the Neapolitan major scale, such as major Locrian, leading whole-tone, and Lydian minor. It is also used as a French augmented sixth, in second inversion (4
3
), and is in fact enharmonic to its second inversion.

Minor seventh flat five[edit]

Similarly, a minor seventh flat five chord (m75, also called as a half-diminished seventh chord) is constructed by diminishing the fifth of a minor seventh chord:[3]

1 3 5 7
C E G B.

The minor seventh flat five chord occurs in the diminished scale[4] on multiple scale degrees as well as on the seventh degree of the major scale (e.g., B–D–F–A in C major).

Dominant seventh flat five chord table[edit]

Chord Root Major third Diminished fifth Minor seventh
C75 C E G B
C75 C E (F) G B
D75 D F Adouble flat (G) C (B)
D75 D F A C
D75 D Fdouble sharp (G) A C
E75 E G Bdouble flat (A) D
E75 E G B D
F75 F A C (B) E
F75 F A C E
G75 G B Ddouble flat (C) F (E)
G75 G B D F
G75 G B (C) D F
A75 A C Edouble flat (D) G
A75 A C E G
A75 A Cdouble sharp (D) E G
B75 B D F (E) A
B75 B D F A

See also[edit]

Sources[edit]

  1. ^ Manus and Hall (2008). Alfred's Basic Bass Scales & Modes/Alfred's Basic Bass Method, p.22/128. ISBN 0739055844/ISBN 0739055836.
  2. ^ Berle, Annie (1996). Contemporary Theory And Harmony, p.100-101. ISBN 0-8256-1499-6.
  3. ^ Morgen, Howard (1979). Concepts: Arranging for Fingerstyle Guitar, p.161. ISBN 0-7692-3075-X.
  4. ^ Manus and Hall (2008), p.23/129.