Modulation Amounts Of Cutoff Frequency - Rob Papen Predator User Manual

- Comb filter
This is a very short delay, which emphasises the comb filter frequency. The Cutoff frequency controls the
length of this delay and resonance (Q) the feedback of the filter.
- Vox filter
Vocal Filter, which adds a voice-like filtering to the sound. In Vox filter mode, the distortion knobs controls the
vowel of the filter.
Pre-Filter Distortion
It is possible to overdrive the oscillator sound ahead of going into the Filter. This can be done in a smooth
way or in an edgy way. For the edgy setting, the following apply:
Overdrive of the filter already starts at about -3dB with a sinus waveform using only 1 oscillator.
Overdrive of the filter starts at -9dB with a sinus waveform using 2 oscillators.
Overdrive of the filter starts at -12dB with a sinus waveform using 3 oscillators.
So be careful with the volume of the oscillators if you are in edgy filter overdrive mode.
The smooth overdrive is more "subtle" and less aggressive than the edgy setting. Also distortion in smooth
setting starts only if you open up the drive amount.
Try it out yourself and open the resonance (Q) to hear the difference in sound with both distortion modes.

Modulation amounts of Cutoff frequency

Envelope
Adds a positive or negative Cutoff frequency Envelope amount. The 'Envelope' is inside the Filter section
itself.
Keep in mind that if you use negative modulation, that the envelope is reversed.
Velocity
Adds a positive or negative Cutoff frequency modulation by the amount of velocity used.
If Predator is in arpeggiator mode (Play mode) the arpeggiator velocity settings are active.
Keytrack
Adds a positive or negative Cutoff frequency modulation by the keyboard note position.
With positive amount, the Cutoff frequency goes up the higher you play the keyboard.
With negative amount, the Cutoff frequency goes down the higher you play the keyboard.
LFO
Adds negative or positive Cutoff frequency modulation by the 'Filter LFO'.
Mod.Wheel
Adds negative or positive Cutoff frequency modulation by the 'Filter LFO'.
Filter 2 (F2)
Filter 2(F2) is an extra filter after the main filter that you can turn on or off.
Great if you want to take away bass from a sequence sound or as extra filter to shape the sound.
In the 'Free modulation section' you can select the Filter2 Cutoff frequency as a destination.
So you can still use a 'Free Envelope', 'Free LFO' or any other midi controller to dynamically control filter 2 s
Cutoff frequency.
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 reduces any frequencies above
2000Hz, so for instance a sound at 4000Hz will be reduced by 12dB.
The Cutoff frequency can be static on a fixed frequency, but you can also modulate the Cutoff frequency with
parts of the 'Free modulation section'.
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