SaxLab Manual - LinPlug Virtual Instruments

Sustain level. Setting the D (Decay) slider to higher values increases the time
taken for the sound’s amplitude to move from full volume to the sustain level.
R (Release): The R (Release) control is used to set the length of time that the
amplitude envelope takes to move from the current level to silence after the
key is released. Setting the R (Release) slider to higher values increases the
time taken for the sound’s amplitude to decrease to zero.
Note: The Sustain level is is reached at the end of the Decay phase and is
fixed at 50% of the maximum level (that is reached at the end of the Attack
phase).
The time range of A and R are actually useful only for special effects, as a
real sax doesn't have a meaningful release time and the attack time is
controlled in realtime by the player. So for a good emulation these parameters
should stay close to zero (bottom of the fader), but not zero. For a slow attack
the attack time (or the main volume) should be controlled by a MIDI controller
(see section ECS).
LinPlug SaxLab User Guide 2.0.3
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