module is an exponential ADSR envelope in one Frac space. Wide range
controls for a punchy sound or extended modulation times.
on the ASM ADSR envelope courtesy of Elby Designs.
sets attack time from 1ms to 5 seconds
sets decay time from 1ms to 10s
determines sustain level from 0 to 10v
sets release time from 1ms to 10s
positive voltage fires the envelope
output - outputs