The C dominant seventh flat five chord (C7♭5) is a distinctive altered dominant chord that introduces a diminished fifth interval, creating a tense and unresolved sound. Comprising the notes C, E, G♭, and B♭, it is built by lowering the perfect fifth (G) of the standard C dominant seventh chord (C, E, G, B♭) by a half step. This alteration results in a diminished fifth (G♭), which, combined with the minor seventh (B♭), produces a tritone interval between E and G♭, contributing to the chord’s dissonant quality. The C dominant seventh flat five chord is often used in jazz and blues to add harmonic complexity and to facilitate smooth voice leading in chord progressions. Its unique structure allows it to function as a tritone substitution for other dominant seventh chords, enhancing its versatility in various musical contexts.
Name: C dominant seventh flat five chord
Notes: C, E, G♭, B♭
Intervals: 1, 3, ♭5, ♭7
Chord symbol: C7(♭5)
Alternative symbols: C7♭5
Type: Tetrad (four-note chord)
C dominant seventh flat five chord on the Staff
C dominant seventh flat five chord on Piano
C dominant seventh flat five chord on Guitar
C dominant seventh flat five chord on Ukulele
Rowan Ellis is a musician and educator with a passion for exploring the language of harmony and melody. With years of experience across classical, jazz, and contemporary styles, Rowan breaks down music theory into clear, practical insights. His goal is to make chords and scales less intimidating and more inspiring for every musician.