BPB Dirty Filter Plus

BPB Dirty Filter Plus is a freeware dual filter plugin with a built-in compressor and four distortion modes.

The plugin features a pair of filters (high-pass and low-pass) with adjustable slopes, a versatile distortion module, a transparent compressor with auto-gain, and a freely resizable user interface.

BPB Dirty Filter Plus offers four different Dirt algorithms:

• Mode A (Original) – Classic tube-style distortion from the original BPB Dirty Filter.
• Mode B (Acid) – A more aggressive distortion suitable for cinematic sound design.
• Mode C (Dust) – A mellow distortion algorithm that sounds vintage and lo-fi.
• Mode D (Cyber) – Reduces the bit depth and sampling rate, resulting in a bitcrushed sound.

The Dirt knob controls the filter resonance and distortion amount. Increasing the Dirt parameter boosts and distorts the signal around the cutoff frequency.

Features:

• 4 Dirt modes (Original, Acid, Dust, and Cyber);
• Dual filters (HP and LP);
• Adjustable filter slope (12-48 dB/Oct);
• Transparent compression;
• Mix (0 – 100%);
• Output volume (±12 dB).

Price: Free.

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