The Saturation Stage; The Second Filter - Access Virus Rack XL User Manual

Now experiment as much as you like with differ-
ent KEY FOLLOW settings and tune the set-
tings via the CUTOFF encoder. And remember
to bring all of the other parameters you have
encountered thus far into play.
í

THE SATURATION STAGE

In the signal chain of the Virus, Filter-1 is fol-
lowed by a saturation stage. It enables you to
add overtones to the filtered signal via distor-
tion. Locate the parameter SATURATION in the
FILTERS section.
01111111111111111112
1 SATURATION
Curve
61111111111111111154
The display will read "SATURATION CURVE
OFF", which means exactly what it says. With
the VALUE buttons or the VALUE encoder, you
can now select from a number of saturation/dis-
tortion curves.
At this point we would like to mention the OSC
VOL parameter, which is next to the SATURA-
TION parameter. The portion of the control
range from the far left to the center position (0)
determines the volume of the filter section's in-
put signal. The portion of the control range lo-
cated to the right of the center position does
not achieve any increase in volume; it simply
intensifies the degree of saturation or distortion.
This effect is only achieved when you have acti-
vated a saturation curve.
Feel free to experiment with the diverse satura-
tion curves and be sure to vary the OSC VOL
settings. Note how the different CUTOFF and
RESONANCE settings influence the saturation
curve.
í
You probably noticed that by a adding a bit of
saturation to the signal you can come up with a
pretty heavy, aggressive sound - especially with
a low filter frequency level and high resonance.
You're probably thinking these types of sounds
could do with some more filtering. We had the
same idea, which is one of the reasons why we
equipped the Virus with another filter per voice.
Off≤
The technical design of this second filter is
identical to the first, so we won't discuss it in
as much detail as we did the first filter. Howev-
er, there are few differences in how you handle
the second filter:
A Only two parameters of the Virus are allocat-
ed exclusively to Filter-2: CUTOFF 2 and FILT 2
MODE.
A The RESONANCE, ENV AMOUNT and KEY
FOLLOW parameters can be allocated to either
of the two filters or both simultaneously. Use
the FILTER SELECT menu in the FILTERS sec-
tion to select the desired operating mode. For
instance, if you choose FILT2, then the values
you set with RESONANCE, ENV AMOUNT and
KEY FOLLOW apply exclusively to Filter-2. The
corresponding parameters of Filter 1 remain un-
affected. On the other hand, if you choose
FILT1+2, the values that you dial in apply by the
same measure to Filters 1 and 2.
ACCESS VIRUS RACK XL OS5

THE SECOND FILTER

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23
The Saturation Stage