x 1 2 0 2 x
Bb dim7
Bb diminished seventh (dim7)
Notes: Bb · Db · Fb · Abb
Abb sounds the same as G.
It is a symmetrical chord: its four notes are three semitones apart, so the same shape repeats every 3 frets and works for four chords (same notes, a different root): Bb dim7, C# dim7, E dim7 and G dim7.
Also spelled A# dim7
Triads
Suspended
Sevenths
Extensions
Drag the file into your recording program (DAW). It plays the guitar's real notes.
Common shapes (3)
6 x 5 6 5 x
x x 8 9 8 9
Other shapes (21)
Showing 12 of 21
x 1 2 0 2 0
6 4 5 0 5 0
x 1 2 0 2 3
x x 8 6 8 0
6 x 5 6 5 0
6 7 5 6 x x
6 4 x 0 5 6
6 4 5 6 x 0
6 7 5 6 x 0
6 4 x 0 5 3
6 4 5 3 x 0
6 7 x 6 8 0
About Bb dim7
The Bb dim7 chord is made up of Bb (root), Db (minor third), Fb (diminished fifth) and Abb (diminished seventh). Its interval formula is 1 – b3 – b5 – bb7. It is a diminished seventh chord: it stacks three minor thirds, sounds very tense and unstable and wants to resolve, typical of jazz and classical music.
On guitar, Bb dim7 has 3 common shapes: the A, E and D shapes. These are CAGED system shapes, the basis for playing the same chord anywhere on the neck. The viewer also shows 21 more voicings, from easiest to hardest. Bb dim7 is also written as A# dim7: the same chord with the root spelled differently, and it sounds identical. The more common spelling is Bb dim7.