Dominant seventh flat five chord

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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).

Jazz musicians typically consider the dominant seventh flat five chord to be associated with or built from the seventh mode of the major scale, the Locrian mode. See: chord-scale system and dominant (music).

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]

Similarly, a minor seventh flat five chord (m75, also known 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
C7(5) C E G B
C7(5) C E (F) G B
D7(5) D F Adouble flat (G) C (B)
D7(5) D F A C
D7(5) D Fdouble sharp (G) A C
E7(5) E G Bdouble flat (A) D
E7(5) E G B D
F7(5) F A C (B) E
F7(5) F A C E
G7(5) G B Ddouble flat (C) F (E)
G7(5) G B D F
G7(5) G B (C) D F
A7(5) A C Edouble flat (D) G
A7(5) A C E G
A7(5) A Cdouble sharp (D) E G
B7(5) B D F (E) A
B7(5) 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.