Dominant seventh flat five chord

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 (C7♭5).  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,(C7♭5) 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 F♯7♭5 and C7♭5 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  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.

Half-diminished seventh chord on C (Cm7♭5).  Play .

Dominant seventh flat five chord table

Chord Root Major third Diminished fifth Minor seventh
C7♭5 C E G♭ B♭
C♯7♭5 C♯ E♯ (F) G B
D♭7♭5 D♭ F A (G) C♭ (B)
D7♭5 D F♯ A♭ C
D♯7♭5 D♯ F (G) A C♯
E♭7♭5 E♭ G B (A) D♭
E7♭5 E G♯ B♭ D
F7♭5 F A C♭ (B) E♭
F♯7♭5 F♯ A♯ C E
G♭7♭5 G♭ B♭ D (C) F♭ (E)
G7♭5 G B D♭ F
G♯7♭5 G♯ B♯ (C) D F♯
A♭7♭5 A♭ C E (D) G♭
A7♭5 A C♯ E♭ G
A♯7♭5 A♯ C (D) E G♯
B♭7♭5 B♭ D F♭ (E) A♭
B7♭5 B D♯ F A

7 flat five chords for guitarists

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

Sources

  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. ↑ http://www.gootar.com/guitar/index.html
  4. ↑ https://jguitar.com/chordsearch?chordsearch=Ab7b5
  5. ↑ https://audiopologie.wordpress.com/the-official-guide-to-reading-chord-charts-in-space/
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