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CHAPTER 
20
The keyboard versions of the Virus
pedals can be used to control dif-
ferent parameters via the modula-
tion matrix (ASSIGN). 
Switch and control pedals are 
available in your local music store. 
The only suitable control pedals 
are the typical synthesizer control 
pedals with a single three pole 
plug (similar to a headphone plug). 
What does not work are volume or 
Wahwah pedals that guitarists 
use. In addition, some manufactur-
ers’ control pedals have a different 
polarity, so that the pedals do not 
function correctly with the Virus 
kb / Indigo (no control effect or 
erratic control). We suggest you try 
out a control pedal before you buy 
it. Some manufacturers’ switch 
pedals also have a different polar-
ity. The Virus kb / Indigo however 
recognizes this polarity when you 
switch it on or whenever you hit 
the Panic-Reset. Double-click both 
Transpose-buttons. “Panic Func-
tion” on page 92.
Aftertouch
(also commonly referred to as 
“Channel Pressure”), is a control 
signal that is generated by hitting 
a key, and whilst holding it, press-
ing it a bit harder (not too hard, 
lest the function be changed to 
“repair required”) The harder the 
keys are pressed, the stronger the 
control signal becomes; excellent 
for modulating any parameters 
while playing the Virus’ via its 
modulation matrix (“ASSIGN”). The 
sensitivity of the Aftertouch-func-
tion is set with the parameter KEY-
BOARD PRESSURE Sensitivity (Off, 
1...127). Normal sensitivity is 
around 64, this allows you to 
exploit the entire aftertouch 
range. If you are using the key-
board to record MIDI data with a 
sequencer, it might make sense to 
turn the aftertouch-function off, 
(Sensitivity=Off), to avoid record-
ing undesired MIDI data. As men-
tioned above, only the Virus kb 
offers the aftertouch functionality.
The Virus’ keyboard can be trans-
posed in semitones. Mind you the 
transposing takes place in the 
transmitter (the keyboard) and not 
in the “receiver” (the sound gener-
ator). The transpose parameter is 
called KEYBOARD Transpose (-
64...+63). The KEYBOARD Trans-
pose can be switched in octaves by 
the TRANSPOSE buttons on the