The Mixer Section - Access Virus Rack User Manual

THE MIXER SECTION

You have already come across two
parameters of the MIXER section: OSC
BAL determines the mix ratio between
Oscillators 1 and 2; in the left half of its
control range, OSC VOL determines the
master volume of the oscillator mix. In
the right half of the control range from
the center position to the far right, OSC
VOL increases the saturation intensity
when a SATURATION curve has been acti-
vated.
Now we'll take a closer look at the SUB
OSC parameter: It controls the volume of
the third oscillator, the so-called
SubOscillator, which always operates an
octave below Oscillator 1.
The SubOscillator is mixed to the Oscilla-
tor 1 and 2 master mix signal as deter-
mined by the OSC BAL parameter. The
master volume of the composite mix is
controlled by the OSC VOL parameter.
The only other parameter available for
the SubOscillator is accessible via the
OSCILLATOR EDIT menu where you have
the option of selecting a triangle or
pulse waveshape (SUB OSCILLATOR
WAVE SQUARE/TRIANGLE).
Another voice-internal signal source of
the Virus is the Noise Generator (NOISE
Volume). Please keep in mind that the
level of the Noise Generator is not sub-
ject to the master volume controlled by
the OSC VOL parameter. 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 create inter-
esting sounds with rich enharmonic over-
tones. These overtones are highly
dependent on the frequency coherence
of both oscillators and it's waveforms.
The frequency coherence can be
changed, for instance use the OSC2
SEMITONE parameter. To blend in the
ring modulator use EDIT: RINGMODULA-
TOR VOLUME (in OSCILLATOR EDIT
Menu). If the RINGMODULATOR VOL-
UME is zero, the ring modulator is
switched off. OSC VOL does not affect
the ring modulator level (or indeed the
noise volume). Therefore the original
oscillator signal can be leveled indepen-
dently of the ring modulator. Be sure to
check out what the ring modulator does
when you select a sine wave for Oscilla-
tor 1 and 2.
Now we can go on and solve the myster-
ies of the signal flow as determined by
the FILTER ROUTING operating mode
SPLIT: Here Oscillator 1 and the SubOscil-
lator are routed to Filter-1, whereas
Oscillator 2 and the Noise Generator are
routed to Filter-2. Although the sound
sources are split into two signal paths,
ACCESS VIRUS RACK 39
The MIXER Section