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 usual pattern MS1: * <- Play * every other measure MS5: RLRLR-- RLRLR-- <- it's a simple circuit that generates a sequence of.