/ Examples / Effects / WPKorg35
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Wherein we present Will Pirkle's virtual analog model of a Korg 35 filter chugin.
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WPKorg35
The WPKorg35 is a lowpass filter found in certain Korg synthesizers. This chugin was based on an online app-note found here. The history is interesting but the technical details are not for the faint of heart.
Resonance controls the strength of the resonant effect. Values near 17 can
produce significant overunity gain. Choose small Gain values if you want
to preserve your auditory equipment.
Cutoff controls the filter cutoff frequency (in Hz). This value is
typically swept to obtain a wah-wah effect. If you select high cutoff
values its possible that the overgain effect will be more serious.
Saturation is a scalar multiplier that can be used to control or emphasize the
nonlinearity in the filter. Only meaningful if Nonlinear is not None.
Nonlinear enables the linear saturator.
Gain is a multiplier for filter output.
Bypass allows you to bypass the effect.
The Example
Here the node Cutoff, a CCGenerator,
generates an expoential sweep of the Cutoff parameter. The speed of this
sweep is controlled by Oversample, another CCGenerator.
Noise produces a white-noise signal which, when passed through
WPKorg35 with a high resonance produces this wonky effect.
You can mute the effects of the filter by checking the Bypass parameter.
The TimeKeeper node is present to provide a
count-in and termination condition.
