Bedroom Producers Blog BPB Dirty Filter Plus v1.0 VST3 AU WiN macOS [FREE]

BPB Dirty Filter Plus is a free distortion and dual-filter effect for producers who want to shape drums, basslines, synths, and sound effects without juggling several plugins. It combines four distortion characters with high-pass and low-pass filtering, plus a transparent compressor for gentle level control.

Original mode covers tube-style warmth through heavy breakup, while Acid delivers harsher, corrosive textures that suit 303-style basslines. Dust softens the polished edge of digital instruments and drum loops for a lo-fi feel. Cyber reduces bit depth and sample rate to create crunchy percussion, gritty synth bass, and robotic effects. A Mix control blends processed and dry audio, making it useful for adding character to drums without committing to a fully distorted sound.

Each filter has its own slope setting, so you can pair gentle bass cleanup with stronger high-frequency shaping, or reverse the approach. Leave Dirt at zero for clean filtering. The compressor includes automatic gain compensation and can add subtle drum-bus cohesion while preserving transients. A freely resizable interface rounds out a practical tool for hobby producers exploring saturation, lo-fi processing, and creative filtering.