The C-flat diminished seventh chord is a highly tense and dramatic chord consisting of the notes C♭, E𝄫, G𝄫, and B𝄫♭. By adding the diminished seventh (B𝄫♭) to the diminished triad, this chord creates a strongly dissonant and unstable sound that naturally resolves to more stable chords. The C-flat diminished seventh chord is commonly used in classical, jazz, and cinematic music to build suspense, enhance dramatic tension, and provide smooth voice-leading in harmonic progressions, making it a powerful tool for expressive and compelling musical storytelling.
Name: C-flat diminished seventh chord
Symnonyms:: C-flat fully diminished chord
Notes: C♭, E𝄫, G𝄫, B𝄫♭
Intervals: 1, ♭3, ♭5, 𝄫♭7
Chord symbol: C♭o7
Alternative symbols: C♭dim7, C♭dim, C♭o
Type: Tetrad (four-note chord)
C-flat diminished seventh chord on the Staff
C-flat diminished seventh chord on Piano
C-flat diminished seventh chord on Guitar
C-flat diminished seventh 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.