Scoofster SV Filter v0.9

What is it?

It is a filter based on state variable filter code. The outputs are tweaked, so you have different working modes.

Features:

  • Stereo processing
  • Adjustable frequency range
  • Self-oscillation!
  • Rare modes like resonant 6dB/Oct lowpass/highpass
  • Different samplerates are supported
  • Inertia control
  • Reset command in case the filter blows up

Parameters

 CutoffControls the cutoff frequency of the filter. Default range is 20 Hz - 22050 Hz.
 ResonanceControls the emphasis at the cutoff frequency. Warning: 100%=self oscillation.
 TypeSelects filter type:
LP6 Resonant 6dB/Oct lowpass
LP12 Resonant 12dB/Oct lowpass
BP Bandpass
HP6 Resonant 6dB/Oct highpass
HP12 Resonant 12dB/Oct highpass
Notch Notch
Peak1 Peak
Peak2 Peak (narrower bandwidth)
Peak+Notch1 Something like resonant lowshelf
Peak+Notch2 Something like resonant highshelf (sounds good on saw wave)
 InertiaControls the time the filter responds to cutoff changes.

Attributes

 High qualitySelects whether the filter is double sampled or not. I suggest using only High quality mode. (You can save CPU by turning it off, but the filter won't be accurate at high frequencies).
 ResolutionControls how often the filter is updated (in samples). For fast modulation, set it to 5-10. For economy, use larger values (20-40).
 Freq min (Hz)Selects the lower frequency limit.
 Freq max (Hz)Selects the upper frequency limit.

Contact

Peter Schoffhauzer
scoofy@inf.elte.hu