pfilter
Key Features
- Uses a probability-based, tempo-synced step sequencer to make filter movement behave like a rhythmic gate without simply muting the signal.
- Lets every step be programmed or randomized from 0–100% probability for patterns that range from precise to variable.
- Provides seeded randomization for repeatable evolving loops, plus random swing for less rigid timing.
- Switches a resonant variable-state filter between two cutoff positions in low-pass, high-pass, band-pass, or notch mode.
- Adds a tempo-synced six-waveform LFO, adjustable pulse length, attack, and decay to refine the shape of each trigger.
- Includes wet/dry mixing, MIDI CC support, and MIDI Learn for blending and controlling the effect in a host.
Description
pfilter is a probability-based, step-sequenced filter effect by de la Mancha for turning sustained audio into rhythmic cutoff patterns. Rather than chopping volume like a conventional gate, it repeatedly switches a resonant filter between two cutoff values, creating pulses, sweeps, and animated tonal movement.
Each sequencer step can be programmed or given its own probability, so a pattern can stay repeatable or introduce controlled variation. Seeded randomization, random swing, and adjustable pulse, attack, and decay controls make it useful for giving pads, synth lines, drum loops, and guitars a less mechanical rhythmic shape.
The variable-state filter offers low-pass, high-pass, band-pass, and notch modes, with a tempo-synced LFO for additional movement. A wet/dry mix and MIDI Learn let it sit subtly alongside the original signal or become a more obvious performance-style effect.
pfilter is a legacy 32-bit Windows VST, so it is best used in a compatible host or a DAW configuration that can bridge older plugins. Its official de la Mancha archive remains online and supplies a product-specific download link without pricing, trial, coupon, or limited-time language.
Frequently Asked Questions
How is pfilter different from a normal trance gate?
A conventional gate creates its rhythm by changing volume, while pfilter creates it by switching filter cutoff between two settings. The result can retain more of the signal's presence while changing its brightness and resonance in time with the project.
Can pfilter make random patterns without losing control?
Yes. Each step has an adjustable probability, so you can decide where variation is allowed. Its seeded randomization is designed to make a generated loop repeatable rather than changing unpredictably every playback.
Which filter types are available?
The official feature list specifies resonant low-pass, high-pass, band-pass, and notch modes. It also includes a tempo-synced LFO that can add movement when a step is triggered.
Will pfilter work in a current 64-bit DAW?
pfilter is an older 32-bit Windows VST. Check whether your Windows host supports 32-bit VST plugins or provides a suitable bridge before building it into a current project.
