Filtron
by Polyverse · Filter · State variable filter
Not rated yet
A free 12 dB state variable filter that morphs smoothly between lowpass, bandpass and highpass, with self-oscillating resonance.
Internal saturation and a two-mode post overdrive add grit, and it accepts stereo CV modulation at audio rate.
Best for: Keys & Synths, Drums, Bass, Sound Design. Genres: Electronic & EDM, Hip-Hop & Trap, Lo-Fi.
Keywords: free, overdrive, drums, smooth, sound design, synths, bass, creamy, gritty, lo-fi, mixing, oversampling, samples & loops.
What it does
Filtron is Polyverse's free filter, pitched as "voltage controlled fun." It is a zero-delay 12 dB state variable filter with a sweepable mode control and a built-in drive stage.
- Continuous filter modes: smooth transitions between lowpass, bandpass and highpass.
- Resonance: self-oscillating resonance that goes up to 11.
- Drive: an internal saturation algorithm plus a post overdrive with Cold and Hot modes.
- Modulation: stereo modulation via CV input, optimized for audio-rate modulation, and integration with Polyverse's Gatekeeper.
- Design: zero-delay filter topology with internal oversampling.
It is free.
Source: Polyverse product page
When to use it
Filtron is the pick for a free, simple multimode filter with good-sounding saturation. It is simpler than Polyverse's own Filterverse and FabFilter Volcano 3, deeper paid filters with more modulation, and where Arturia Filter SEM models a specific analog design, Filtron is a general multimode filter.
- Best for: filter sweeps and tone shaping on synths, drums and loops, and resonant sound design.
- Genres: electronic, hip-hop and lo-fi.
- Look elsewhere if: you want built-in LFOs, envelopes or multiple filter types; Filterverse or Volcano 3 go further.
- Standout: continuous mode morphing with saturation and overdrive, at no cost.
What producers say
There are no user reviews yet; the main published opinion is positive about the sound and interface.
- Bedroom Producers Blog (2023): praised its "smooth filter mode transitioning and creamy saturation" and said the graphic design "doesn't get in the way of usability."
Where to buy
- Polyverse: Free
Tutorials and reviews
- First Look at FILTRON from Polyverse - their FREE filter! (adrenakrohm)
- Filtron - Polyverse's New FREE Plugin! (Elisha Record Studio)
- This New FREE Plugin Sounds GOOD! Polyverse Filtron
- Awesome FREE plugin from Polyverse - Filtron
- Polyverse Introduces: Filtron a new FREE filter plug-in!
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