Access virus os4 User Manual

CHAPTER

Introduction

of selecting a triangle or pulse
waveshape (SUB OSCILLATOR WAVE
SQUARE/TRIANGLE).

Another voice-internal signal
source of the Virus has no visible
control features on the control
panel: the Noise Generator. The
dedicated sound parameters are
its volume and coloration (NOISE
Volume and Color in the OSCILLA-
TOR

EDIT menu). On the middle

position of NOISE Color the Noise
Generator produces white noise.
Please keep in mind that the level

of the Noise Generator is not sub-
ject to the master volume con-
trolled by the OSC VOL pot. In other
words, it is audible even when OSC
VOL

is set to zero.

The VIRUS’ ring modulator is a new
sound source. The output of the
two oscillators is multiplied to cre-
ate interesting sounds with rich
enharmonic overtones. These over-
tones are highly dependent on the
frequency coherence of both oscil-
lators and it’s waveforms. The fre-
quency coherence can be changed,
for instance use the OSC2 SEMI-
TONE parameter. To blend in the
ring modulator use EDIT: RING-
MODULATOR VOLUME (in OSCILLA-
TOR

EDIT Menu). If the

RINGMODULATOR VOLUME is zero,
the ring modulator is switched off.
OSC VOL

does not affect the ring

modulator level (or indeed the
noise volume). Therefore the origi-
nal oscillator signal can be leveled
independently of the ring modula-
tor. Be sure to check out what the
ring modulator does when you
select a sine wave for Oscillator 1
and 2.