Access virus os4 Manual De Usuario
38
CHAPTER
4
Introduction
Locate the pot labeled DETUNE
and slowly rotate it to the right
from the far left position (which is
preset in the sound program). You
can hear the tone start to waver
and as you turn the pot further to
the right, how this vibrato effect
increases until Oscillator 2 sounds
distinctly out of tune with Oscilla-
tor 1. This wavering or vibrato-type
effect has a popular traditional in
synthesizers. It is used to achieve
chorus effects, create sounds remi-
niscent of stringed instruments/
string sections or simply beef up
the sound.
and slowly rotate it to the right
from the far left position (which is
preset in the sound program). You
can hear the tone start to waver
and as you turn the pot further to
the right, how this vibrato effect
increases until Oscillator 2 sounds
distinctly out of tune with Oscilla-
tor 1. This wavering or vibrato-type
effect has a popular traditional in
synthesizers. It is used to achieve
chorus effects, create sounds remi-
niscent of stringed instruments/
string sections or simply beef up
the sound.
The SEMITONE pot enables you to
transpose Oscillator 2 by plus/
minus four octaves in semitone
steps while Oscillator 1 maintains
the pitch. This feature is especially
interesting when used in conjunc-
tion with two other oscillator func-
tions: synchronization and
frequency modulation.
transpose Oscillator 2 by plus/
minus four octaves in semitone
steps while Oscillator 1 maintains
the pitch. This feature is especially
interesting when used in conjunc-
tion with two other oscillator func-
tions: synchronization and
frequency modulation.
Locate and activate the SYNC but-
ton in the OSCILLATOR 2 section
(the LED must illuminate). The syn-
chronization function forces Oscil-
lator 2 to restart its wave cycle at
the same time as Oscillator 1 wave-
shape starts its cycle. The initial
ton in the OSCILLATOR 2 section
(the LED must illuminate). The syn-
chronization function forces Oscil-
lator 2 to restart its wave cycle at
the same time as Oscillator 1 wave-
shape starts its cycle. The initial
effect of this measure is that the
wavering tone that resulted from
detuning and mixing the oscillator
signals disappears.
wavering tone that resulted from
detuning and mixing the oscillator
signals disappears.
The SYNC effect really becomes
interesting when you transpose
Oscillator 2 upwards in comparison
to Oscillator 1 via the SEMITONE
pot. What happens is that the
wave cycle of Oscillator 2 is inter-
rupted as soon as Oscillator 1 starts
its cycle. The pitch of the second
oscillator no longer has the
expected effect, instead it gener-
ates special tones, in some cases
for lack of a better description
“screaming” type effects.
interesting when you transpose
Oscillator 2 upwards in comparison
to Oscillator 1 via the SEMITONE
pot. What happens is that the
wave cycle of Oscillator 2 is inter-
rupted as soon as Oscillator 1 starts
its cycle. The pitch of the second
oscillator no longer has the
expected effect, instead it gener-
ates special tones, in some cases
for lack of a better description
“screaming” type effects.
The other effect that benefits from
manipulating the interval between
the oscillators is frequency modu-
lation (FM). It generates new tonal
spectra in which the signal of the
first oscillator controls the fre-
quency of the second oscillator
similar to the manner in which fil-
ters can be controlled via enve-
lopes. And here too you have a pot
which allows you to control the
intensity of: FM AMOUNT. Basi-
cally, this effect is similar to a
vibrato, although here you’re deal-
ing with an extremely fast vibrato
manipulating the interval between
the oscillators is frequency modu-
lation (FM). It generates new tonal
spectra in which the signal of the
first oscillator controls the fre-
quency of the second oscillator
similar to the manner in which fil-
ters can be controlled via enve-
lopes. And here too you have a pot
which allows you to control the
intensity of: FM AMOUNT. Basi-
cally, this effect is similar to a
vibrato, although here you’re deal-
ing with an extremely fast vibrato