This page briefly describes all available library functions.
The Core library defines some handy low level functions:
rl(LIST): return a random item from the given list rr(MIN, MAX): return a random number from the given range ntf(NOTE): return frequency of midi note number NOTE
Attack / Decay / Sustain / Release module.
This module generates an envelope amplitude between 0.0 and 1.0. When the vel argument is set to >0 the envelope generator will start (note on), when vel is set to zero, the generator will go to the decay phase and fall down to zero amplitude (note off)