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FUNCTIONS
CUTOFF controls the filters cutoff- (or corner-) frequency.
POLE selects between 4 pole low pass, quasi band pass (that sounds different than the "true" bandpass of
the MMF) and 6 pole low pass.
Q-PEAK determines the boost of the corner frequency. From "9" on, the filter starts self-oscillating.
To create useful and interesting sounds, the cutoff parameter has to be controlled dynamically.
This is mostly done by the later described envelope generators and/or by modulating the cutoff with
a periodical signal e.g. an LFO- or an audio signal. This is done with the cutoff modulation section (CM).
CUTOFF MODULATION
CM 1 adjusts the corner frequency modulation intensity by ENVELOPE GENERATOR 1.
ENVELOPE GENERATOR 1 switch inverts the control voltage of envelope generator 1.
CM 2 adjusts the corner frequency modulation intensity by ENVELOPE GENERATOR 2.
ENVELOPE GENERATOR 2 switch inverts the control voltage of envelope generator 2
OSC1/LFO adjusts the corner frequency modulation intensity by the triangle waveform of OSC1 respective
to the LFO. Maximum sweep reaching over +/-5 octaves.
OSC1 LFO switch selects the triangle waveform of OSC1 or the LFO as modulation source.
AUDIO
In the patch section of the LPF you'll find the HI Z INPUT which is an additional and patchable input.
It is internally pre-patched to the audio output of the Multi Mode Filter. This level is adjustable in the LPF
MIXER section as described above.
OUTPUT socket allows the filtered audio signal be coupled to any input. It's destinated to
the audio input of the AMP-section (FILTER MIX).
CV
Here you'll find patchable modulation-inputs for the LPF:
CUTOFF can be used to provide other signals than the triangle waveform of OSC1 or the LFO (to which it is
internally routed; see above) as a modulation source for the cutoff frequency. Use the OSC1/LFO knob to
adjust the modulation intensity.
LEVEL can be used for gain-control respectively amplitude-modulation of the LPF output signal.
Q-PEAK enables the resonance to be voltage controlled. Again, using audio signals for cv duty can provide
interesting results.
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