Access virus os2 Manuale Utente

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towards the center position. From the center position towards the far right, Filter 1/Saturation is blended
out of the mix so that the signal is routed through Filter 2 only. Consequently, you must set FILTER
BALANCE to the center position if you want both filters in series (in equal amounts) in the signal path.
CUTOFF 2
Controls the cutoff frequency of Filter 2. Normally, CUTOFF 2 does not operate absolutely, but relatively
to CUTOFF: The cutoff frequency of the second filter is subordinate to the CUTOFF value you
determined for the first filter. However you can use the CUTOFF 2 knob to dial in a relative +/- deviation
in frequencies, i.e. a higher or lower frequency. When you set CUTOFF 2 to the center position, both
filters have the same CUTOFF frequency. in EXPERT MODE, you can access FILTER 2 CUTOFF LINK
ON/OFF to sever the link between CUTOFF and CUTOFF 2. In this case the two knobs CUTOFF and
CUTOFF 2 are independent cutoff controls for Filters 1 and 2, respectively.
SATURATION
Controls the distortion curve for the post-Filter 1 saturation stage. In addition to the OFF (no saturation)
option, you can select from several distortion curves with different saturation intensities. After you press
SATURATION, you can now select from a number of saturation/distortion curves via with VALUE buttons
or the VALUE knob. Once you have selected a curve, the SATURATION LED illuminates continually. The
saturation affect is influenced by the shape of the curve, the tone of the input signal and the input level
as determined by OSC VOL (see appropriate section).
FILT 1 MODE
FILT 2 MODE
Selects the operating mode of the indicated filter:
LP
 
The low pass filter suppresses frequencies higher than the CUTOFF frequency (see appropriate
section)  and allows the lower frequencies through.
HP 
The high pass filter works in the opposite manner of the low pass filter: It suppresses the lower
frequencies in a signal and lets the higher frequencies pass.
BP
  The band pass filter suppresses both ends of the tonal spectrum and allows only a narrowly
defined bandwidth of the original sound to pass.
BS 
The band stop filter, band reject filter or notch filter works in the opposite manner of the band
pass filter. It allows all of the frequencies of a signal except for a narrow frequency band
around the cutoff to pass. The term „notch“ is fairly descriptive; you might say this filter chops
a notch out of the sound spectrum.
FILTER ROUTING
This feature offers four filter routing options which allow you to operate the filters in series or in parallel:
SER 4
  The filters are switched in series; with two poles each, both filters have the same slope for a
total of four filter poles.
SER 6
  The filters are switched in series; Filter 1 has four poles, Filter 2 has two poles so the
overall slope 
is equivalent to six poles.
PAR 4
  The filters are switched in parallel and feature two poles each.
SPLIT
  The filters are switched in parallel and feature two poles each. Additionally, they receive
independent input signal s (more on this later). The stereo position of the signals can also