The C-sharp diminished seventh chord is a highly tense and dramatic chord composed of the notes C♯, E, G, and B♭. By stacking consecutive minor thirds, the C-sharp diminished seventh chord creates a compact and dissonant sound that naturally seeks resolution, making it a powerful tool for building suspense and driving harmonic motion. Commonly used in classical, jazz, and cinematic music, this chord adds a sense of urgency, mystery, and emotional intensity, providing musicians with a versatile and striking way to enhance tension and create memorable harmonic moments.
Name: C-sharp diminished seventh chord
Symnonyms:: C-sharp 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-sharp diminished seventh chord on the Staff
C-sharp diminished seventh chord on Piano
C-sharp diminished seventh chord on Guitar
C-sharp 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.