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CHAPTER 

21

The Vocoder of the VIRUS

The signal is treated in a similar 
way to the signal which passes the 
modulator bank. In this case, the 
carrier signal is split by the band-
pass filters. Each bandpass of the 
carrier bank corresponds to one of 
the modulator bank. Usually, both 
bandpasses use the same fre-
quency slice. Similar to a synthe-
sizer’s envelope, the signal level 
being measured by the envelope 
followers of the modulator, is used 
to control the level of the carrier’s 
filter. Last, but not least, the indi-
vidually controlled signals of the 
carrier bank are reunified to create 
the vocoder’s output sound.

 

Vocoder Mode 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 difference is in 
the filter section. The oscillator sig-
nal does not pass the filter section, 
as this section is being used to con-
trol 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 mul-
tipart. Use this certain auxiliary 
send signal as the carrier signal 
within the vocoder.