Bbdim

Bbdim is Bb, Db and Fb, a diminished triad. The shape this page opens on is written x1232x, lowest string first.

Also written Bb°, Bbo or Bb diminished. The same chord either way; which spelling you meet depends on who wrote the chart.

There are 5 common shapes for Bbdim on the guitar, and 49 derived voicings in the triad family.

In which keys. Every note of Bbdim belongs to Ab minor (the ii°) and B major (the vii°).

The common shapes, written lowest string first: x1232x, 64x65x, xx89x9, x-13-11-x-11-12, x-13-14-15-14-x.

Triad. Three notes across one string set. Bbdim has x1232x, xxx320, x423xx, xx232x, x4232x, xx2320, 0423xx, xxx656.

Tensions. A shell of Bbdim, root, third and seventh, leaves a string free, and the tones that belong over it are the 11 (Eb) and the b13 (Gb).

The common shapes and the derived voicings come from different places, and both are explained in where the chords and the theory come from.