A# Diminished Guitar Chord
All positions and voicings on the fretboard
No playable voicings found for this chord. Try a different chord type or root note.
A# Diminished filtered by fret:
A# Diminished — chord details
The A# Diminished chord is made up of the following notes: A#, C#, E.
Intervals: 1P, 3m, 5d.
The diagrams above show every voicing and chord variation for A# Diminished on guitar. Use the fret filter to narrow down voicings within a specific fret range — ideal for finding close-proximity chords when composing or arranging.
Note: A# is enharmonically equivalent to Bb. Chord shapes are the same.
The A# diminished chord stacks two minor thirds, creating a root, minor third, and diminished fifth — A#, C#, E with intervals 1P, 3m, 5d. This compressed structure sounds anxious, unstable, and tense. Diminished triads function as passing chords, leading tones, and tension builders in classical harmony, jazz, and film scores. Their inherent dissonance makes them powerful tools for creating drama and suspense.
How to Play A# Diminished
On guitar, A# dim typically requires a barre or partial barre voicing. Experiment with different positions to find the voicing that best suits your playing context — higher positions sound brighter and tighter, while lower positions offer more bass and resonance. CAGED system shapes help navigate these options efficiently.
A# Diminished in Progressions
A# diminished most often appears as the vii° chord in B major, serving as a leading-tone chord that strongly resolves upward. It also functions as a chromatic passing chord between scale degrees, adding tension and forward motion.
Common Substitutions
A#dim7, C#dim, or A7 (as a dominant approach) are effective substitutions.
Difficulty: This is an advanced chord on guitar — it requires precise finger placement and usually a barre or uncommon shape.