BPB Dirty Filter Plus is a free dual filter plugin designed to enhance your sound with dynamic filtering, distortion, and compression. It combines high-pass and low-pass filters with adjustable slopes, allowing precise control over your audio's frequency range. The plugin features a clean, resizable interface that makes it easy to integrate into any workflow.

The core strength of BPB Dirty Filter Plus lies in its four distinct distortion modes, each offering a unique character. Mode A delivers classic tube-style warmth, while Mode B introduces a more aggressive edge suited for cinematic textures. Mode C provides a vintage, lo-fi feel with mellow saturation, and Mode D creates bitcrushed effects by reducing bit depth and sampling rate. The Dirt control simultaneously adjusts filter resonance and distortion intensity, shaping the signal around the cutoff frequency.

Alongside its distortion capabilities, the plugin includes a transparent compressor with auto-gain to maintain consistent levels without coloring the sound. Users can blend the compressed and distorted signal with the original using the mix control, while output volume adjustments ensure optimal gain staging. Offering a rich palette of tonal options in a lightweight package, BPB Dirty Filter Plus is a powerful tool for sound designers and producers seeking creative filtering and distortion effects.