Explore C#7b5 Guitar Chord Shapes & Master the Fretboard

The C#7b5 chord, C# seventh flat five, contains C#, E#, G and B. The G is the lowered fifth, a diminished fifth above C#, and the E# is the major third, which is simply the pitch F under another name. The B is the minor seventh.

Three voicings are listed, one with a barre, and the lowest is at the 4th fret. It shares its pitches with G7b5, and both fit the C# Lydian dominant scale for melodic lines.

Play a shape into the microphone check to see which strings ring.

C# 7th with flat 5th guitar chord is also written as C#7b5, C#7(b5) or C#7-5.

Notes of the C# 7b5 chord:

C# E# G B

Tones in the Dominant Seventh Flat five chord:

Formula: 1 3 b5 b7

C# 7b5 Chord Interactive Fretboard

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Go to the full guitar chords tutorial.

C# 7b5 Guitar Chord Diagrams

Position 1 Barre Movable

Finger Positions

Mute the low E string
Mute the high E string
Place your index finger (1) on the fret 4 of the A and G strings at the same time
Place your middle finger (2) on the fret 5 of the D string
Place your ring finger (3) on the fret 6 of the B string

Position 2 Movable

Finger Positions

Mute the low E string
Mute the A string
Place your index finger (1) on the fret 8 of the B string
Place your middle finger (2) on the fret 9 of the D string
Place your ring finger (3) on the fret 9 of the high E string
Place your pinky finger (4) on the fret 10 of the G string

Position 3 Movable

Finger Positions

Mute the B string
Mute the high E string
Place your index finger (1) on the fret 9 of the low E string
Place your middle finger (2) on the fret 9 of the D string
Place your ring finger (3) on the fret 10 of the A string
Place your pinky finger (4) on the fret 10 of the G string

Find more shapes in our all guitar chords online library. If you prefer a printable pdf, download the Free Guitar Chords Chart Pdf

Play This Chord With Other Roots

C 7b5 | D 7b5 | E 7b5 | F 7b5 | G 7b5 | A 7b5 | B 7b5 | C#7b5 | D#7b5 | F#7b5 | G#7b5 | A#7b5 | Ab7b5 | Bb7b5 | Db7b5 | Eb7b5 | Gb7b5

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Created by

Giancarlo Facoetti

Giancarlo is a musician (teaching guitar since 2000), software engineer, AI consultant and published researcher

FAQ

Which notes spell C#7b5?

C#7b5 is C#, E#, G and B. The G is the lowered fifth, a semitone under the G# of a plain C# major triad.

How is C# seventh flat five different from C#7?

C#7 has C#, E#, G# and B. C#7b5 lowers the G# to G, a diminished fifth over the root, and keeps the rest.

Is C#7b5 also written Db7b5?

Yes. Db7b5 uses Db, F, Abb and Cb, which are the same pitches as C#, E#, G and B. It needs a double flat, so C#7b5 is simpler.

Which scale contains all of C#7b5?

The C# whole-tone scale is C#, D#, E#, F##, G## and B. It contains every pitch of the chord, with the lowered fifth G written as F## in the scale.

How many C#7b5 voicings can I play?

There are 3 voicings, between fret 4 and fret 10. One is a barre voicing and none uses an open string.