[ Filter ]
The sound generated in the oscillators is passed into the filter. Here, the harmonic structure is altered by the
selected filter type.
Predator als
o has an extra secondary filter called F2 in case extra changes are needed.
Main Filter
Cutoff
This sets the filter s frequency where the filter starts altering the sound.
For instance, if you set the Cutoff to 2000Hz and use a 12dB Lowpass filter it re
duces any frequencies above
2000Hz, so for instance a sound at 4000Hz will be reduced by 12dB.
The Cutoff frequency can be static at a fixed frequency, but you can also modulate the Cutoff frequency with
the
Filter Envelope
,
Keyboard tracking
,
Modulation W
heel
and
LFO
.
Therefore there is a line on Predator front
-
end which shows that these controls alter the Cutoff frequency.
The modulation doesn t move the Cutoff control knob from its initial position, but if you add any kind of
modulation (change the sil
ver colour control knobs) the Cutoff frequency is internally modulated.
Resonance (Q)
The resonance controls how much the sound at the
Cutoff frequency
is increased, so the resonance
"emphasises" this frequency.
As you increase resonance it gets more an
d more pronounced till the filter self-
oscillates".
So basically the resonance is feedback onto the Cutoff frequency.
NB: the 6dB filter types are unable to self
-
oscillate, and in Comb filter the resonance controls the comb filters
feedback.
To hear what
resonance does, the best thing to do is to try changing it. If you open the LFO modulation you
will hear that the Cutoff frequency starts to move. Opening the Resonance emphasises this movement.
There is a special mode to create resonance sounds without
using the oscillators. This is originally only
possible with
analog
synthesizers. To use this special resonance sounds, you need to turn off all the
oscillators.
One word of caution, this resonance sound can be very loud, so be careful with the volume.
Al
so it produces a bit of noise artifacts.
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