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CHAPTER 

14

The Parameters

TIME Sets the bipolar time param-
eter for the filter envelope. It 
determines the envelope’s 
response once it reaches the SUS-
TAIN

 phase (see appropriate sec-

tion): If the knob is set to the 
center position (12 o’clock) indi-
cated by the mathematical infinity 
symbol, then the SUSTAIN level 
remains constant through to the 
end of the note; if you turn it 
counter-clockwise to the left 
(towards FALL), then the level 
drops off at an increasing rate 
towards the minimum level; If you 
turn the knob clockwise to the 
right (towards RISE), the level rises 
at an increasing rate to maximum.

RELEASE Determines the speed or 
rate at which the volume of the fil-
ter envelope decreases after the 
end of a note. The higher the 
DECAY

 value, the longer it takes for 

the envelope to fall from its cur-
rent level to the minimum level, 
when the key is released.

SATURATION CURVE The SATURA-
TION

 stage in the filter section 

offers a selection of different satu-
ration or distortion characteristics. 
You can use these to add overtones 
to a sound. Beyond that, you are 
free to radically bend sounds using 
further DSP effects. The intensity 
of the distortion or DSP effects can 
be varied considerably via the sec-
ond half of the OSC VOL control 
range. For the distortion curves, 
this intensity range is equivalent 
to a gain boost of 12 decibels, in the 
case of the ”Digital” curve as much 
as 24 decibels. A special feature of 
the Virus’ SATURATION stage is 
that, despite the fact that its gain 
is boosted, the signal level is kept 
constant via OSC VOL so that only 
the tonal color or timbre of the 
sound is varied.

The SATURATION stage is always 
downstream of (post) Filter-1 irre-
spective of the given filter routing. 
Consequently, in serial filter 
modes, the SATURATION stage is 
always located between the two 
filters. You can thus filter the oscil-