pfilter Combines Filter & Step Sequencer

pfilter is a free Windows VST that creates a steppy, gated effect, but using filter cut-off instead of volume to give a wider range of possibilities. It uses a variable state filter, triggered between 2 adjustable cut-off values by a tempo-sync’d probability-based step sequencer. An LFO can modulate the filter when triggered and trigger pulse length, attack and release can shape the sound


  • tempo-sync step sequencer, with 2 to 32 steps over a sequence length of 2 to 32 beats
  • can be programmed or random, by setting the probability of each step from 0-100%
  • seeded randomisation for repeatable loops up to 100 beats long
  • resonant variable filter, LP, HP, BP and notch
  • filter triggered between upper and lower cut-off values, in either direction
  • tempo sync LFO, with 6 waveforms and settings from 1/16 beat to 96 beats
  • adjustable pulse length, attack and decay for shaping the modulation
  • random swing for step sequencer
  • wet/dry mix control
  • midi CC and midi learn

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