BPB Dirty Filter

BPB Dirty Filter

A colorful distorted filter effect (VST2/VST3/AU/AAX)

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Free VST Plugins · Digital Audio Workstations · Music Production Software

It’s a Free Filter

BPB Dirty Filter is a freeware VST plugin designed by Bedroom Producers Blog. It features a pair of resonant filters and emulated analog tube circuitry. You can use the BPB Dirty Filter in your favorite DAW to add some subtle coloration or to crush the audio signal into pieces.

BPB Dirty Filter

It’s a Versatile Filter

Featuring a high-pass and a low-pass filter combo, BPB Dirty Filter is a useful utility for cleaning up your audio. Both filters have a range between 20 Hz and 20 kHz and the filter slope can be set to 12, 24, 36, or 48 dB/oct. The plugin also features a Mix knob and an output volume control for easy gain staging in your DAW.

BPB Dirty Filter

It’s a Dirty Filter

With the Drive knob set to zero, BPB Dirty Filter operates as a transparent filter plugin. In this mode, it is great for cleaning up low-frequency hum or removing high-frequency noise. However, push the Drive knob to a higher setting and BPB Dirty Filter transforms into one of the most hardcore distortion plugins around.

BPB Dirty Filter is a creative effect built for sound designers. And although it can be used as a well-behaved filter, this wild little plugin was born to apply unhealthy amounts of dirt and grit to your audio. Think of it as a versatile distortion pedal with a wide range of tones. Pick any frequency range and add any amount of distortion to it, from subtle tube saturation to earth-shattering audio destruction.


Check out the demo video below to hear BPB Dirty Filter in action.

And here’s an in-depth review by Free Plugin Friday.

What people are saying

“I recently started dwelling into sound design and the free BPB Dirty Filter from Bedroom Producers Blog is such a fun distortion tool for layering and sonic exploration.” – Marcel Gnauk (Free To Use Sounds)

“Add some grit to your beats, make your basslines scream, or create some lovely filter sweeps with this easy to use plugin! It’s a really nice, simple filter plugin with a lovely vibe.” – Ronnie van Wijgerden (Rekkerd)


  • High-pass filter (20 Hz – 20 kHz);
  • Low-pass filter (20 Hz – 20 kHz);
  • Adjustable slope (12, 24, 36, or 48 dB/octave);
  • Tube distortion;
  • Mix (0 – 100%);
  • Output volume (±12 dB).

Tech Specs

  • Available for Windows & macOS;
  • 32-bit & 64-bit compatible;
  • VST2/VST3/AU/AAX plugin formats.

Promo images

BPB Dirty Filter by Bedroom Producers Blog

BPB Dirty Filter screenshot (JPG).

Dirty Filter Glitch

Glitch animation mockup (GIF).