Back surdo (L for low, H for high) R/L: accented note (right/left hand suggested r/l: Quieter, unaccent note *R or *L: Trill this note Variations MSD: L* L* -> only second half of the arrow into its pointing direction. Positive or negative. [mm] engraved_indicator_move_forward = 3.1; // Engraving depth. [mm] // Cylinder faces to use the 4 pins for trigger, gate.