Fbm is a minor, spelled Fb, Abb and Cb. In Ukulele (low G) tuning (G3 C4 E4 A4) the easiest shape is x432, which sits at fret 2, spans 2 frets and mutes 1 string. 12 positions for it are shown below, from the nut up to fret 11.
Notes and intervals
Note
Fb
Abb
Cb
Interval
1P
3m
5P
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.
x432sits at fret 2, spans 2 frets and mutes 1 string443xsits at fret 3, spans 1 fret and mutes 1 string9777sits at fret 7 and needs a barre across 3 strings at fret 7911010sits at fret 9, spans 2 frets and lets 1 string ring open040xsits at fret 4, needs no stretch at all, lets 2 strings ring open and mutes 1 string011010sits at fret 10, spans 1 fret and lets 2 strings ring open0110xsits at fret 11, needs no stretch at all, lets 2 strings ring open and mutes 1 string0402sits at fret 2, spans 2 frets and lets 2 strings ring open0432sits at fret 2, spans 2 frets and lets 1 string ring open4432sits at fret 2 and spans 2 frets0777sits at fret 7, needs a barre across 3 strings at fret 7 and lets 1 string ring open043xsits at fret 3, spans 1 fret, lets 1 string ring open and mutes 1 string
Keys Fbm belongs to
Fbm is diatonic to 24 of the 96 keys this app knows, playing a different role in each.