Bb7 is a dominant seventh, spelled Bb, D, F and Ab. In Open G tuning (D2 G2 D3 G3 B3 D4) the easiest shape is x30133, which sits at fret 1, spans 2 frets, lets 1 string ring open and mutes 1 string. 12 positions for it are shown below, from the nut up to fret 13.
Notes and intervals
Note
Bb
D
F
Ab
Interval
1P
3M
5P
7m
12 ways to play it
Ordered by how hard they are to fret, easiest first, one per position on the neck. Fret numbers are relative to the position marked beside each grid.
x30133sits at fret 1, spans 2 frets, lets 1 string ring open and mutes 1 string870766sits at fret 6, needs a barre across 2 strings at fret 6 and lets 1 string ring open81001090sits at fret 8, spans 2 frets and lets 2 strings ring openx33336sits at fret 3, needs a barre across 4 strings at fret 3 and mutes 1 string8701090sits at fret 7, spans 3 frets and lets 2 strings ring openx150131515sits at fret 13, spans 2 frets, lets 1 string ring open and mutes 1 string013013110sits at fret 11, spans 2 frets and lets 3 strings ring open010013110sits at fret 10, spans 3 frets and lets 3 strings ring openx150131512sits at fret 12, spans 3 frets, lets 1 string ring open and mutes 1 stringx33130sits at fret 1, spans 2 frets, lets 1 string ring open and mutes 1 stringx3313xsits at fret 1, spans 2 frets and mutes 2 stringsx30130sits at fret 1, spans 2 frets, lets 2 strings ring open and mutes 1 string
Keys Bb7 belongs to
Bb7 is diatonic to 8 of the 96 keys this app knows, playing a different role in each.