Non-traditional key signatures, where each alteration is separately given. The first signature is [f sharp, a flat, b flat]. The second one is [c flat-flat, g sharp-sharp, d flat, b sharp, f natural], with explicitly selected octaves for each alteration. MusicXML Part 1 F 1 A -1 B -1 2 4 G 2 C 4 2 1 half C -2 G 2 D -1 B 1 F 0 2 3 4 5 6 C 4 2 1 half light-heavy