7b5 Chord on guitar

A 7b5 chord is a dominant 7th chord with a flat fifth, a tense jazz dominant with a whole tone sound.

Written asC7b5
Formula1 3 b5 b7
Notes in CC E Gb Bb
Semitones from the root0, 4, 6, 10

About the 7b5 Chord

G7b5 is G, B, Db and F.

It has two tritones, so it shares its notes with the 7b5 chord a tritone away: Db7b5.

Use it as a V chord that resolves to the I chord, or as a passing chord.

Intervals

  • 1: Root, 0 semitones above the root
  • 3: Major 3rd, 4 semitones above the root
  • b5: Tritone, 6 semitones above the root
  • b7: Minor 7th, 10 semitones above the root

7b5 Chord charts in all 12 keys

Each chart shows the strings from the thick low E on the left to the thin high e on the right. Numbers in the dots are fingers: 1 index, 2 middle, 3 ring, 4 little, T thumb. × marks a muted string and ○ an open one. A bar across strings is a barre.

C7b5: C E Gb Bb

C7b5×○2431
x34310
C7b53×12134
x34356
C7b58121341
8989(11)8

G7b5: G B Db F

G7b5○○2431
343001
G7b53121341
343463

D7b5: D F# Ab C

D7b5××○123
xx0112
D7b55×12134
x56578
D7b57○34112
(10)(11)0778

A7b5: A C# Eb G

A7b5×○○123
x01023
A7b55121341
565685

E7b5: E G# Bb D

E7b5○○○123
010130
E7b57×12134
x7879(10)

B7b5: B D# F A

B7b5×○3142
x21201
B7b5×12134
x23245
B7b57121341
7878(10)7

F#7b5: F# A# C E

F#7b5××○312
21xx10
F#7b5121341
232352

Db7b5: Db F G Cb

Db7b5×○○431
x43001
Db7b54×12134
x45467
Db7b59121341
9(10)9(10)(12)9

Ab7b5: Ab C D Gb

Ab7b5○43112
430112
Ab7b54121341
454574

Eb7b5: Eb G A Db

Eb7b5××1234
xx1223
Eb7b56×12134
x67689
Eb7b57○41223
(11)07889

Bb7b5: Bb D Fb Ab

Bb7b5×○○123
x10130
Bb7b5×12134
x12134
Bb7b56121341
676796

F7b5: F A Cb Eb

F7b5○○1243
101201
F7b5121341
121241

Scales to play over C7b5

Each of these scales, started on C, holds every note of the chord:

More chord types