Bdim7

B1D♭3F♭5A♭♭♭7

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

on ukulele on piano the scale

Every fingering that fits a hand

Fig. 2

x20101

open

Fig. 3

x20131

moderate

Fig. 4

x2313x

hard

Fig. 5

789797

hard · barre

Fig. 6

7867xx

hard

What is true of it

Bdim7 is B, D, F and A♭ — 1, b3, b5 and bb7 counted from B.

The easiest of the 5 fingerings below is x20101: 3 fingers, held at the 1st fret.

1 of them use open strings, which is what makes a shape quiet to change to.

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

With a different note underneath

first inversion

Bdim7/D

xx0101

second inversion

Bdim7/F

120101

third inversion

Bdim7/A♭

420101

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.

B in other shapes

B7dominant seventh Bmaj7major seventh Bm7minor seventh Bmajor Bmminor Bdimdiminished

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