Piano chord · Sevenths

A♯ diminished 7th chord on piano

Right hand: A♯ (1), C♯ (2), E (3), G (5)

How to play A♯dim7 on piano: the keys to press, which fingers to use, inversions and how it’s written on the staff.

Symmetrical and very tense — every note is a minor 3rd apart.

A♯dim7 is the vii°7 chord in B minor.

Spell as B♭dim7
Notes
A♯C♯EG
Formula
1♭3♭5𝄫7
Built from
root · minor 3rd · diminished 5th · diminished 7th

Piano

Root position · numbers are finger numbers

𝄞𝄢

How to play it

Right handA♯1 · thumbC♯2 · indexE3 · middleG5 · 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♯dim7 on piano

On piano, A♯dim7 has two black keys (A♯ and C♯) and two white keys.

A♯dim7 piano chord diagram (A♯ diminished 7th)
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