The B-flat dominant seventh flat five chord (B♭7♭5) is a four-note chord consisting of B♭, D, F♭, and A♭. It is derived by lowering the fifth of the B♭ dominant seventh chord, resulting in a diminished fifth interval. This alteration imparts a tense and dissonant character to the chord, making it a distinctive choice in various musical genres. The B-flat dominant seventh flat five chord is often utilized in jazz and blues to create a sense of unresolved tension, typically resolving to a tonic or subdominant chord. Its unique sound adds depth and complexity to chord progressions, making it a valuable tool for composers and performers seeking to evoke a particular emotional response. Additionally, this chord is frequently employed in tritone substitutions, where it replaces a dominant seventh chord a tritone away, providing smooth voice leading and harmonic interest.
Name: B-flat dominant seventh flat five chord
Notes: B♭, D, F♭, A♭
Intervals: 1, 3, ♭5, ♭7
Chord symbol: B♭7(♭5)
Alternative symbols: B♭7♭5
Type: Tetrad (four-note chord)
B-flat dominant seventh flat five chord on the Staff
B-flat dominant seventh flat five chord on Piano
B-flat dominant seventh flat five chord on Guitar
B-flat 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.