The A-sharp diminished seventh chord is a highly tense and dramatic chord made up of the notes A♯, C♯, E, and G. By stacking minor thirds to form a diminished seventh, the A-sharp diminished seventh chord generates a sense of instability and urgent tension, making it ideal for leading to resolutions or creating suspenseful moments in music. Its dark, dissonant character allows it to be effectively used in classical, jazz, and contemporary compositions, adding emotional intensity and a compelling push toward harmonic resolution within chord progressions.
Name: A-sharp diminished seventh chord
Symnonyms:: A-sharp fully diminished chord
Notes: A♯, C♯, E, G
Intervals: 1, ♭3, ♭5, 𝄫7
Chord symbol: A♯o7
Alternative symbols: A♯dim7, A♯dim, A♯o
Type: Tetrad (four-note chord)
A-sharp diminished seventh chord on the Staff
A-sharp diminished seventh chord on Piano
A-sharp diminished seventh chord on Guitar
A-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.