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CHAPTER 10
The Vocoder of the VIRUS

 

 

here you can enable the vocoder and choose
the signal source for the carrier bank at the
same time:

-  OSC  This mode uses the whole oscillator

section of the VIRUS, including the noise
generator as the carrier signal. The oscillators
can be played polyphonic which enables the
amplifier envelope to work as usual. The dif-
ference is in the filter section. The oscillator
signal does not pass the filter section, as this
section is being used to control the vocoder.
It is possible to feed the vocoder with a single
sound which uses the whole filter section.
Just use the aux-sends in the multimode to
feed the vocoder’s input with a single sound
created within another multipart. Use this cer-
tain auxiliary send signal as the carrier signal
within the vocoder.

-  OSC-HOLD  T h i s   s e t t i n g   i s   i d e n t i c a l   t o

”OSC” although the hold-mode (which also is
available at COMMON/KeyMode) is activat-
ed.

-  NOISE   White noise is used as the carrier.

The oscillator section is disabled.

-  IN  (L / In L+R / In R / Aux L ...) The analog in-

puts or the aux-sends are the carrier signal. If
a stereo source, like L+R, is chosen, the left
and right signal is mixed to create a mono
signal.

OSC VOL adjusts the output level of the vocod-
er. This is independent of the signal source
(which can be assigned using the vocoder
mode parameter)

In the Edit menu

While INPUT Select regularly assigns the input
source for INPUT Mode, the modulator bank in-
put is assigned here, when the vocoder is acti-
vated. Again, stereo sources like L+R are mixed
to a monophonic signal. 

It is possible to control the number of filter
bands here between 1 and 32. This parameter
changes the sonic complexity of the sound, by
using more or less filter bands. Less filter bands
result in a typical vocoder sound. More filter
bands increase the quality of the signal’s repro-
duction (e.g. how easily you can ”understand” a
vocoded voice). The VIRUS’ polyphony might
vary depending on the number of active filter
bands.

The central frequency of the bandpass filters in
the modulator- and carrier bank. Using a high Q
(filter quality parameter, which is controlled us-
ing KEYFOLLOW) you can adjust the central
frequency of the spectrum you edit.