G♭dim7

G♭1B♭♭♭3D♭♭♭5F♭♭♭♭7

Three minor thirds stacked. The seventh is doubly diminished, which is why it is written with a double flat.

Written the other way round it is F♯dim7 — 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

20121x

moderate

Fig. 3

20454x

hard

Fig. 4

234242

hard · barre

Fig. 5

2312xx

hard

Fig. 6

23424x

hard · barre

What is true of it

G♭dim7 is G♭, B♭♭, D♭♭ and F♭♭ — 1, b3, b5 and bb7 counted from G♭.

B♭♭, D♭♭ and F♭♭ are double flats, and they have to be: every letter from G♭ upwards is used once, so the b3 cannot be written any other way.

The easiest of the 5 fingerings below is 20121x: 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.

2 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 G♭, the root. Everything else is a chord tone with its degree printed in it.

With a different note underneath

first inversion

G♭dim7/B♭♭

x01212

second inversion

G♭dim7/D♭♭

x3424x

third inversion

G♭dim7/F♭♭

xx1212

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.

G♭ in other shapes

G♭7dominant seventh G♭maj7major seventh G♭m7minor seventh G♭major G♭mminor G♭dimdiminished

Cdim7 C♯dim7 D♭dim7 Ddim7 D♯dim7 E♭dim7 Edim7 Fdim7 all 374