VIRUS CLASSIC MANUAL
29
Introduction
odd-numbered tones, i.e. the first (the root note that determines the pitch), third, fifth, and so forth.
By turning the SHAPE pot from the sawtooth control range towards the pulse control range, you are
actually dialing every other overtone out of the mix, which explains why the sound becomes thinner.
You can continue modifying the sound by reducing the symmetrical width of the pulse wave. In the
Virus, you can execute this sound-shaping measure via the WAVE SEL/PW (PW = pulse width) pot,
PROVIDED THE SHAPE POT IS SET TO A POSITION IN THE RIGHT HALF OF ITS CONTROL
RANGE (LATER THAN 12 O’CLOCK). Rotate the WAVE SEL/PW pot slowly from the left to the right
and leave the SHAPE pot at the far right position. You can hear how the treble content of the sound
increases while the sound becomes ever thinner. At the far right position, the signal is no longer
audible because the pulse width is equivalent to 0% and consequently the wave no longer oscil-
lates.
Starting at the center position (12 o’clock) indicated by the sawtooth, turn the SHAPE pot counter-
clockwise towards the left. You can hear how the overtones are increasingly mixed out of the signal
until you can only hear the root note. This sound is produced by a so-called sine wave, one of 64
other waveshapes that you have at your disposal for sound generation purposes. These wave-
shapes can also be activated via WAVE SEL/PW (WAVE SEL: Wave Select), PROVIDED THE SHAPE
POT IS SET TO A POSITION IN THE LEFT HALF OF ITS CONTROL RANGE (EARLIER THAN 12
O’CLOCK). Regardless of the current SHAPE setting, you can also select a wave in the EDIT menu
under Oscillator 1 WAVE.
Go ahead and check out the different waveshapes. The second of the 64 waves is a triangle wave,
the remainder of the waveshapes are each a unique tonal blend. After you have familiarized yourself
with this raw material, experiment with the parameters of the FILTERS and AMPLIFIER sections you
have dealt with thus far (don’t forget about SATURATION and the corresponding function of the
OSC VOL pot), to get a feel for how the diverse waveshapes respond to filtering, saturation and
amplifier modifications.
The Second Oscillator
As we mentioned previously, in addition to the other sound sources, the Virus is equipped with a
second oscillator. Judging from the amount of control features on this oscillator’s section of the
control panel, you have probably already gathered that it has more sound-shaping options than
Oscillator 1.
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