Extreme Key signatures Various extreme key signatures: from 11 flats to 7 flats and 7 sharps to 11 sharps (all marked as major) MusicXML Part 1 -11 major 2 4 G 2 C 4 2 1 half -10 major C 4 2 1 half -9 major C 4 2 1 half -8 major C 4 2 1 half -7 major C 4 2 1 half 7 major C 4 2 1 half 8 major C 4 2 1 half 9 major C 4 2 1 half 10 major C 4 2 1 half 11 major C 4 2 1 half light-heavy