Access Virus Rack XL, User Manual

Page: 25 / 194

ACCESS VIRUS RACK XL OS5
25
Filter Routing
PDF VERSION - RESTRICTIONS APPLY
FILT 2 in the FILTERS SELECT menu and rotate
the RESONANCE encoder to the desired posi-
tion. Set the CUTOFF 2 encoder to a position to
the right of the center position. This configura-
tion can be described as a complex non-linear
filter set up where the cutoff frequency is con-
trolled via the CUTOFF encoder. You can dial in
a wide range of sound-shaping option via CUT-
OFF 2. Also try modifying the resonances of
both filters as well as the SATURATION curve to
come up with different filtering characteristics.
Now experiment with the diverse filter modes
and listen closely to the effect of the parame-
ters RESONANCE, ENV AMOUNT and KEY
FOLLOW in conjunction with FILTERS SELECT.
Please also keep in mind that the chances of
choking a sound off are substantially greater
when you are using both filters: For instance, if
the first filter is used as a low pass with a low
cutoff frequency and the second as a high pass
with a high cutoff frequency, the Virus will not
generate an audible signal when you set FIL-
TER BALANCE to the center position (12
o’clock).
FILTER ROUTING
The final parameter we’ll discuss for the time
being is FILTER ROUTING. This feature offers
several filter routing options which allow you to
operate the filters in series, i.e. patch one after
the other in the signal chain, or in parallel, which
means side by side in the signal chain:
- SER-4 The filters are switched in series; with
two poles each (12dB/Okt.), both filters have
the same slope for a total of four filter poles
(24dB/Okt.).
- SER-6 The filters are switched in series; Fil-
ter-1 has four poles (24dB/Okt.), Filter-2 has
two poles (12dB/Okt.) so the overall slope is
equivalent to six poles (36dB/Okt.).
- PAR-4 The filters are switched in parallel and
feature two poles each (12dB/Okt.).
- SPLIT The filters are switched in parallel and
feature two poles each (12dB/Okt.). Additional-
ly, they receive independent input signals (more
on this later). Each of the two oscillators routes
its signal into one of the two filters whose sig-
nals can be spread in the panorama via a pa-
rameter called UNISON Pan Spread.
Regardless of which FILTER ROUTING op-
tion you chose, the SATURATION stage is al-
ways post-Filter-1, i.e. after Filter in the signal
chain.