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Filters – Front Panel
CUTOFF
Determines the cutoff frequency of Filter-1 and 2 (with exceptions; see CUTOFF 2).
RESONANCE
Controls the resonance (also called filter feedback or Q factor). Depending on the FILT SELECT set-
ting, RESONANCE affects the first filter, the second filter or both filters.
ENV AMOUNT
Determines the modulation intensity of the cutoff frequency filter envelope. Depending on the FILT
SELECT setting, ENV AMOUNT affects the first filter, the second filter or both filters. In contrast to
virtually all other modulation intensity parameters in the Virus, ENV AMOUNT is a unipolar parame-
ter. The polarity of the modulation can be changed individually for each filter via the ENV POLARITY
function in the FILTER EDIT menu.
KEY FOLLOW
Determines the extent to which the filter frequency follows the pitch (Note Number) and the Pitch
Bend. Depending on the FILT SELECT setting, KEY FOLLOW affects the first filter, the second filter
or both filters. The function uses C 1 (MIDI Note Number 36) as a neutral starting point or base note:
Regardless of the KEY FOLLOW value, the filter frequency is not influenced at this pitch. In the FIL-
TER EDIT menu you have the option of freely defining the base note under KEYTRACK BASE.
FILTER BALANCE
Has different functions depending on the FILTER ROUTING setting (see appropriate section as
well): In the parallel FILTER ROUTING operating modes PAR 4 and SPLIT, it controls the balance of
volume levels between the two filters - or in actuality SATURATION and Filter-2.
Technically, in the serial FILTER ROUTING operating modes SER 4 and SER 6, the left half and the
right half of the control range address different parameters: When the knob is set to the far left posi-
tion, you will hear Filter-1/Saturation exclusively, whereas Filter-2 is blended into the mix as you