Piano chord · Triads

A♯ diminished chord on piano

Right hand: A♯ (1), C♯ (3), E (5)

How to play A♯dim on piano: the keys to press, which fingers to use, inversions and how it’s written on the staff.

Tense and unstable — it usually wants to resolve up by a half step.

A♯dim is the vii° chord in B major. In minor keys: ii° in G♯ minor.

Spell as B♭dim
Notes
A♯C♯E
Formula
1♭3♭5
Built from
root · minor 3rd · diminished 5th

Piano

Root position · numbers are finger numbers

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How to play it

Right handA♯1 · thumbC♯3 · middleE5 · pinky

Left handA♯5 · pinkythe root, an octave lower

Finger numbers: 1 thumb · 2 index · 3 middle · 4 ring · 5 pinky. Inversions use the same notes with a different one on the bottom — they help you move smoothly between chords. Tap any key to hear it.

Tips for playing A♯dim on piano

On piano, A♯dim has two black keys (A♯ and C♯) and one white key.

A♯dim piano chord diagram (A♯ diminished)
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