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
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,(C75) is C–E–G–B. It can be represented by the integer notation {0, 4, 6, 10}.

This chord is enharmonically equivalent to its own second inversion. In other words, dominant 7th flat 5 chords share all the same notes as the dominant 7 flat 5 chord a tritone above them (although they may be spelled differently), so F75 and C75 contain the same notes. Because of this property, it readily functions as a pivot chord. It is also frequently encountered in tritone substitutions. In this sense there are only 6 truly "unique" dominant 7th flat 5 chords, in the same way that there are only 4 augmented chords, 3 diminished chords and 2 whole tone scales.

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

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).

In jazz harmony 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.

In classical harmony, the chord is rarely seen spelled as a seventh chord, and is instead most commonly found as the enharmonically equivalent French sixth chord.

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

7 flat five chords for guitarists[edit]

7 Flat 5 Chords for a guitar in Standard tuning. (left is the low E string, number is the fret, x means mute the string)

Ab7b5: xx6778

B7b5: x23245

C7b5: x34356

D7b5: xx0112

E7b5: 010130

F7b5: xx3445

G7b5: xx5667

[3] [4] [5]

See also[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. ^
  4. ^
  5. ^

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