Access Virus Rack XL User Manual page 95

- 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.
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.
VOCODER BAND QUANTITY
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.
CENTER FREQUENCY
DEFAULT: 64 (MIDDLE)
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.
FREQUENCY SPREAD
DEFAULT: +63 (RIGHT)
The spread of the filter bands used by the mod-
ulator and carrier bank. This parameter can ad-
just both banks together or separately. The
mode depends on the setting of the filter select
buttons. FILT1 is assigned to the carrier, FILT2
controls the modulator. With maximum KEY-
FOLLOW (+63) the filters cover the whole fre-
quency spectrum. Reducing the KEYFOLLOW
results in narrower spread, whereby just a part
of the frequency spectrum is covered. CUTOFF
1+2 define the centre frequency. Linking FILT1
and FILT2 results in identical frequencies for the
modulator and the carrier. If only the spread of
the carrier bank is being reduced, the analysed
spectrum is being rendered on a part of the car-
rier signal. If you reduce the spread of the mod-
ulator bank (FILT2), just a part of the modulator
signal is analysed but applied on the whole car-
rier signal. This leads to an increased spread of
the spectrum. If one of the two KEYFOLLOW
parameters has a negative amount, the modu-
lator spectrum is applied on the carrier spec-
trum in a mirror symmetrical way. This causes a
very interesting change in the bands. The mod-
ulator's treble frequencies control the carrier's
bass frequencies and vice versa, for instance a
human voice still has the sound of the human
voice but it would be virtually impossible to un-
derstand anything. We want to encourage you
to experiment with mirror symmetrical sounds
using this function. It is definitely worth a try!
MODULATOR FREQUENCY OFFSET
DEFAULT: 0 (MIDDLE)
A linear shift of the modulator bank's central fre-
quencies against the carrier bank, results in
pitch-shifting and "mickey mouse" effects.
CUTOFF2 creates an offset of the modulator to
the carrier bank.
PDF VERSION - RESTRICTIONS APPLY
ACCESS VIRUS RACK XL OS5
Vocoder
95