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5
Program Parameters
Env [edit]: Sustain Level
Page:
Soft Button:
Range:
Default:
Unlike the attack stage, which always brings the envelope level up to
100%, the decay stage can be told to leave the envelope level wherever
you like. The Sustain Level parameter lets you specifiy what the level
should be as the envelope completes its decay and moves into the sustain
stage. You may set this to 100% to make the decay stage flat, or 0% to
make the sustain stage flat, but more often you'll leave it somewhere in
the middle. This allows you to model the dynamics of a note being
struck and then ringing out. For the filter and pitch/mod envelopes, this
parameter can even be negative. Since the subsequent envelope stages
always head back towards zero, a negative sustain level will give you an
envelope that zigs high, zags low, and ends up somewhere in the middle.
This parameter can also be adjusted by pressing the appropriate envelope
button and turning the sust level knob.
Env [edit]: Sustain Time
Page:
Soft Button:
Range:
Default:
This parameter determines the length of the sustain stage of the
envelope. If you are familiar with analog synths, this paramter may
surprise you, since a traditional synth will remain in the sustain stage as
long as you have the note held down. The Ion provides this behavior, of
course—simply set this parameter to "hold", and your note will be
sustained until your finger gets tired. But many physical instruments do
not work like this. A piano, for example, exhibits a distinct attack and
decay as the hammer strikes the string, but the string does not then ring
forever—the volume slowly diminishes until the string is silent. The Ion
allows you to model this behavior by specifying a sustain time. This is
the amount of time it takes for the envelope level to drop from the
sustain level to zero. Once the envelope has sustained to zero, the
envelope has completed and will remain at zero. When the amp envelope
has sustained to zero, that means the entire note has completed and will
no longer use one of the synth's voices. This parameter can also be
adjusted by pressing the appropriate envelope button and turning the
sust time knob.
68
2
2
0 – 100% or -100% – 100%
100%
2
3
0.5 ms – 30 sec, hold
hold
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