Measures or has planned variations) BSD: 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 sustain (inspired by but simplified from Benjamin AM's [design](https://electro-music.com/forum/post-372492.html#372492)). * Looping mode, allowing attack-decay envelopes to repeat as long as a sequence of envelopes or as an addendum.