Using Adsr; What Is Adsr?; Attack; Decay - Rocktron Prophesy II User Manual

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ATTACK

Determines the length of time for the assigned parameter to
reach its maximum value (or the upper limit value set by the
controller assignment, if set) once a plucked string is detected.

DECAY

Determines the length of time for the parameter value to decay
from the peak ATTACK value to the value set by the S-LVL
(Sustain Level) parameter.
S-TIME Determines the length of time that the parameter will sustain
(remain) at the value set by the S-LVL parameter.
S-LVL
Sets the sustain level (or parameter value) at which the assigned
parameter value will be sustained for S-TIME milliseconds. This
value can be set from 0 to 127, with 0 representing the minimum
parameter value available and 127 representing the maximum
value.
R-TIME
Determines the length of time it takes for the assigned param-
eter to return to its minimum value from the value set by the S-
LVL parameter.
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1
Older implementations of ADSR utilized a threshold-based method of triggering the ADSR function, rather
than pluck detection. Threshold-based implementations are less effective, as many notes can be plucked
that go unnoticed by the detection circuit and never trigger the ADSR function.