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CHAPTER 

14

The Parameters

CUTOFF Determines the cutoff fre-
quency of Filter-1 and 2 (with 
exceptions; see CUTOFF 2).

RESONANCE Controls the reso-
nance (also called filter feedback or 
Q factor). Depending on the FILT 
SELECT setting, RESONANCE affects 
the first filter, the second filter or 
both filters.

ENV AMOUNT Determines the 
modulation intensity of the cutoff 
frequency filter envelope. Depend-
ing on the FILT SELECT setting, ENV 
AMOUNT

 affects the first filter, the 

second filter or both filters. In con-
trast to virtually all other modula-
tion intensity parameters in the 
Virus, ENV AMOUNT is a unipolar 
parameter. The polarity of the 
modulation can be changed indi-
vidually for each filter via the ENV 
POLARITY function in the FILTER 
EDIT menu.

KEY FOLLOW Determines the 
extent to which the filter fre-
quency follows the pitch (Note 
Number) and the Pitch Bend. 
Depending on the FILT SELECT set-
ting, KEY FOLLOW affects the first 
filter, the second filter or both fil-
ters. 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 FIL-
TER

 ROUTING operating modes 

PAR 4 and SPLIT, it controls the bal-
ance of volume levels between the 
two filters - or in actuality SATURA-
TION

 and Filter-2.