C7b5 Piano Chord
A tense jazz chord with a tritone replacing the perfect fifth. Often serves as a tritone substitution in jazz progressions — replacing the classic dominant seventh chord.
Recommended voicing
C4 · E4 · Gb4 · Bb4
With bass · rootless
Left hand
Gb3 · Bb3 · E4
fingers 5–3–1
Right hand
Free
melody / improvisation
Jazz accompaniment with a bass player: the bass supplies the root, leaving the right hand free for melody or improvisation.
Other names for the C7b5 chord
Other names: C 7th flat 5
Music theory name: seventh flat five chord
Common name: C 7b5 chord
Notes and intervals in the C7b5 chord
| Note | Interval |
|---|---|
| C | Root |
| E | Major 3rd |
| Gb | Diminished 5th |
| Bb | Minor 7th |
Inversions
1st inversion
E4 · Gb4 · Bb4 · C5
2nd inversion
Gb4 · Bb4 · C5 · E5