Access os5 Manuale Utente

Pagina di 198
 
ACCESS VIRUS OS5
 
23
 
The Second Filter
 
In other words, at the center position (12
o’clock) the manually selected frequency of Fil-
ter-2 is identical to that of Filter-1. When you ro-
tate the pot to the left the cutoff frequency level
of Filter-2 is increased relatively to Filter-1,
when you turn to pot to the right the cutoff fre-
quency level is decreased relatively. Now when
you adjust the Cutoff pot, you adjust the cutoff
frequency of both filters by the same measure!
This feature lets you determine a difference in
values in the filter frequencies (called an offset)
via the Cutoff2 pot which remains constant
whenever you adjust the Cutoff pot.
Yet another experiment in which you can come
up new filtering characteristics that are typical
of the VIRUS:
Set the FILTER BALANCE pot to the center po-
sition (12 o’clock) and Cutoff 2 to the maximum
level. The FILTER ROUTING operating mode
must remain SER 6. Set Cutoff and RESO-
NANCE to a middle value and select a clearly
audible SATURATION curve.
Now you can filter this complex signal pro-
duced by a combination of the saturation stage
and the Filter-1 yet again. Rotate the Cutoff 2
pot slowly towards the center position (12
o’clock). You can hear how Filter-2 gradually
modifies the distorted signal. You can set a
RESONANCE value for Filter-2 if you press the
FILT 2 SELECT button and rotate the RESO-
NANCE pot to the desired position. Set the Cut-
off 2 pot to a position to the right of the center
position. This configuration can be described
as a complex non-linear filter set up where the
cutoff frequency is controlled via the Cutoff pot.
You can dial in a wide range of sound-shaping
option via Cutoff 2. Also try modifying the reso-
nances of both filters as well as the SATURA-
TION 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 the SELECT but-
ton. 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 the
FILTER BALANCE pot to the center position (12
o’clock).