The F-sharp diminished seventh chord is a highly tense and dramatic chord that consists of the notes F♯, A, C, and E♭. F♯ serves as the root, grounding the chord, while A, the minor third, C, the diminished fifth, and E♭, the diminished seventh, create a stacked series of minor thirds that gives the chord its characteristic unstable and suspenseful quality. This fully diminished structure generates intense tension and a strong sense of anticipation, making it particularly effective in classical, jazz, and cinematic music for dramatic transitions, modulations, and moments that demand emotional intensity and harmonic complexity.
Name: F-sharp diminished seventh chord
Symnonyms:: F-sharp fully diminished chord
Notes: F♯, A, C, E♭
Intervals: 1, ♭3, ♭5, 𝄫7
Chord symbol: F♯o7
Alternative symbols: F♯dim7, F♯dim, F♯o
Type: Tetrad (four-note chord)
F-sharp diminished seventh chord on the Staff
F-sharp diminished seventh chord on Piano
F-sharp diminished seventh chord on Guitar
F-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.