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240 Chapter 20 ES2
Sustain and Sustain Time
When the Sustain Time (rise) parameter is set to its center value—which can be
achieved by clicking the center symbol shown above—the Sustain level behaves like
the Sustain parameter of any synthesizer ADSR envelope.
In this position, the Sustain level (abbreviated as S) defines the level that is sustained
for as long as the key remains depressed, following the completion of the Attack time
and Decay time phases.
The Sustain Time slider defines the time it takes for the level to rise to its maximum—or
to fall to zero—after the decay phase is over. Settings in the lower half of its range (Fall)
determine the speed at which the level decays from the Sustain level to zero. The lower
the slider position, the faster the decay speed. Settings in the upper half of its range
(Rise) determine the speed at which the level rises from the Sustain level to its
maximum value. The higher the slider position, the faster the speed of the rise.
Release Time
As with any synthesizer ADSR envelope, the Release time parameter (R) defines the
time the level takes to decay to zero after the key is released.
Vel
The Vel (Velocity Sensitivity) parameter defines the velocity sensitivity of the entire
envelope. If it is set to maximum, the envelope will only output its maximum level
when the keys are struck at maximum velocity.