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VIRUS CLASSIC MANUAL
35
Introduction
This function enables you to control the rate of the LFOs via the pitch, or more accurately, via the
MIDI note number, so that higher notes generate faster LFO rates. As result, when you press and
hold several notes you will hear all kinds of substantially different periodic fluctuations.
Finally, the LFOs can also be used as additional envelopes. The control feature for this effect is the
ENV MODE button. When you press this button, two things occur: For one, the LFO no longer initi-
ates its cycles periodically, but only once at and in sync with the start of a note, and for the other,
the active range of the LFO is switched from bipolar (in both directions from the zero position) to
unipolar (from zero in one direction only). Please note that this applies to the modulation target but
not the modulation intensity. Here you can still determine a value in the entire bipolar range.
This effect is especially prominent when used in conjunction with the sawtooth wave, which enables
a fade-out type of effect (when you dial in a positive AMOUNT value) or a volume-swell type of
effect (negative AMOUNT) for the available modulation targets. Using the LFO Curve parameter
located in the LFO EDIT menu, you can have the ”ramp” rise or fall exponentially. If you choose a tri-
angle for your waveshape, the device will generate an ascending phase (attack) and a descending
phase (decay). LFO Curve also lets you determine the temporal relationship between attack and
decay; in other words, their respective rates.. Dial in the desired speed via the RATE pot.
You can also use S&H and S&G in ENV MODE to come up with some attractive results: S&H gener-
ates a single random value at the start of a note (in this case, the RATE pot has no effect); S&G
works in the same manner although in this case the RATE value is crucial. It determines the amount
of time it takes to glide from the previous to the new random value.
LFO 2
The design of the second LFO is essentially the same as the first, so we’ll spare you the repetition of
details SHAPE 1 and 2 are available as a joint modulation target; the filter frequencies and the Pan-
orama position can be manipulated individually. You may also freely select a parameter for your
modulation destination.
Summary of Contents for VIRUS CLASSIC
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