User Guide
ACCESS VIRUS OS4 119
Filter-Edit-Menu
lator signal conventionally with
the first filter, distort the signal,
and process the distorted signal
via the second filter as you see fit.
The Effects section of the Virus fea-
tures a further distortion module
called DISTORTION. Its design is
largely identical to that of the SAT-
URATION, except for one major dif-
ference: whereas SATURATION
affects each voice separately, DIS-
TORTION processes all voices col-
lectively in the effects section. This
makes a huge difference in tone.
Let’s take look at the SATURATION
modes:
OFF The signal is not processed.
LIGHT, SOFT, MIDDLE, HARD
Different analog distortion curves
with different characteristics and
intensities.
DIGITAL Digital distortion with
hard clipping.
SHAPER Sine characteristic
curve with several wave cycles.
With the Shaper, you can drasti-
cally warp signals. In some cases,
the results are similar to the spec-
tra of linear frequency modula-
tions.
RECTIFIER Continuous rectifica-
tion of the signal; this type of dis-
tortion is independent of the given
level.
BITREDUCER Continuous reduc-
tion of the digital signal’s bit
depth; generates digital quantiza-
tion noise.
RATEREDUCER Continuous
reduction of the digital sampling
rate; generates digital aliasing.
RATE+FLW The RateReducer
with keyfollow; the sampling rate
follows the played pitch.
LOWPASS 1-pole low-pass filter
for moderate processing of high
frequencies.
LOW+FLW The low-pass filter
with keyfollow; the cutoff fre-
quency follows the played pitch.
HIGHPASS 1-pole high-pass fil-
ter for moderate processing of low
frequencies.