Access Virus Rack User Manual page 40

38 CHAPTER 4
Introduction
measure is that the wavering tone that
resulted from detuning and mixing the
oscillator signals disappears.
The SYNC effect really becomes interest-
ing when you transpose Oscillator 2
upwards in comparison to Oscillator 1 via
the SEMITONE encoder. What happens is
that the wave cycle of Oscillator 2 is
interrupted as soon as Oscillator 1 starts
its cycle. The pitch of the second oscilla-
tor no longer has the expected effect,
instead it generates special tones, in
some cases for lack of a better descrip-
tion "screaming" type effects.
The other effect that benefits from
manipulating the interval between the
oscillators is frequency modulation (FM).
It generates new tonal spectra in which
the signal of the first oscillator controls
the frequency of the second oscillator
similar to the manner in which filters can
be controlled via envelopes. And here
too you have a encoder which allows you
to control the intensity of: FM AMOUNT.
Basically, this effect is similar to a
vibrato, although here you're dealing
with an extremely fast vibrato featuring
a frequency within the range of human
hearing. This signal is not actually audi-
ble as a vibrato effect. Instead, you'll
hear a sound modulation, in some cases,
a very drastic one at that. Choose the
pure sine waveshape for Oscillator 2. In
conjunction with the sine wave, the fre-
quency modulation generates very clear,
in some cases bell-like, spectra.
In the Virus you have the option of com-
bining the two functions called oscillator
synchronization (SYNC) and frequency
modulation (FM AMOUNT, to generate
new harmonic spectra. Switch SYNC on
and experiment with the FM AMOUNT.
Also try out different SEMITONE settings
and the diverse waveshapes of Oscillator.
The Virus is equipped with a third master
oscillator that lets you create further
oscillations and spectra. You can access
the parameters of this oscillator, which
are described in a later chapter, via the
OSCILLATOR EDIT menu.