Access Virus Rack XL, User Manual

Page: 131 / 194

ACCESS VIRUS RACK XL OS5
131
The parameters of the Virus vocoder
PDF VERSION - RESTRICTIONS APPLY
and DECAY parameter. These signals are no
audio signals, as they contain the envelope of
the signal being analysed.
THE CARRIER BANK
The signal is treated in a similar way to the sig-
nal which passes the modulator bank. In this
case, the carrier signal is split by the bandpass
filters. Each bandpass of the carrier bank corre-
sponds to one of the modulator bank. Usually,
both bandpasses use the same frequency slice.
Similar to a synthesizer’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 individ-
ually controlled signals of the carrier bank are
reunified to create the vocoder’s output sound.
THE PARAMETERS OF THE
VIRUS VOCODER
The Vocoder related parameters are located
in the EFFECT Menu [“Vocoder” on page 94]
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 gen-
erator as the carrier signal. The oscillators
can be played polyphonic which enables the
amplifier envelope to work as usual. But the
oscillator signal does not pass the filter sec-
tion,
- 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) The analog inputs 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
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)
INPUT SELECT
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.
MODULATOR FREQUENCY OFFSET
A linear shift of the modulator bank’s central fre-
quencies against the carrier bank, results in
pitch-shifting and ”mickey mouse” effects.
CUTOFF 2 creates an offset of the modulator to
the carrier bank.