A♯dim

A♯1C♯♭3E♭5

Two minor thirds stacked. The fifth is diminished, so it cannot be dropped without losing the chord.

Written the other way round it is B♭dim — the same twelve keys on a piano, a different piece of notation.

on ukulele on piano the scale

Every fingering that fits a hand

Fig. 2

x12320

moderate

Fig. 3

x1232x

hard

Fig. 4

xx8656

hard

Fig. 5

6786xx

moderate · barre

Fig. 6

xx89b9

hard

What is true of it

A♯dim is A♯, C♯ and E — 1, b3 and b5 counted from A♯.

The easiest of the 5 fingerings below is x12320: 4 fingers, held at the 1st fret.

None of them uses an open string, so this chord moves up the neck unchanged — the same shape 1 fret higher is the chord a semitone above.

1 of the 5 need a barre.

1 string stays silent.

Where its notes are on the neck

Fig. 7 — first 12 frets

The brass dots are A♯, the root. Everything else is a chord tone with its degree printed in it.

With a different note underneath

first inversion

A♯dim/C♯

x42320

second inversion

A♯dim/E

012320

An inversion is the same chord with a different note lowest. The name changes to a slash name because the bass is what a listener hears as the foundation.

A♯ in other shapes

A♯major A♯mminor A♯augaugmented A♯5power chord A♯sus2suspended second A♯sus4suspended fourth

Cdim C♯dim D♭dim Ddim D♯dim E♭dim Edim Fdim all 374