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A♯dim

A♯dim is a diminished triad made of A♯–C♯–E. Its minor third and diminished fifth define the triad; it is not the four-note dim7 or half-diminished chord. The same pitches may also be spelled as B♭dim (B♭–D♭–F♭).

C example showing the interval structure of A♯dim, notes A♯, C♯, E
C piano keyboard example showing the interval structure of A♯dim, notes A♯, C♯, E
NotesA♯ · C♯ · E
Formula1 · ♭3 · ♭5
AliasesB♭dim

Voice leading

A♯dim → B

Common tones
Moving voice
A♯ → B · C♯ → D♯ · E → F♯

A♯ moves up a semitone to B, C♯ moves up a whole tone to D♯ and E moves up a whole tone to F♯.

A♯dim
B
BD♯F♯

Inversions

EA♯C♯
EC♯A♯
EA♯C♯

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