
Pirkko Chorus Deluxe
Based on
The 'Chorus Deluxe' name plus Intensity, Rate, Width and an X-Over low-frequency guard are the MXR M83 Bass Chorus Deluxe's control set (notreble.com (opens in new tab)); Dirty Boys does not name it.
- Type
- Pedal
- Era
- 2010s
About this block
Named after your lush and beautiful mother-in-law, Pirkko is a boutique chorus plugin meticulously engineered for modern musicians. While traditional choruses often turn your low-end into a "mushy" mess, Pirkko provides a solid, high-fidelity shimmer that preserves your punch, clarity, and fundamental.
Pirkko combines vintage bucket brigade warmth with digital precision. Whether you need a subtle 80s New Wave airiness or a deep, liquid-like swirl for fretless passages, Pirkko delivers a lush and beautiful warm sound for all your need!
Controls
- Intensity: Your "more" knob. This adds the chorused shimmer to your dry path. Unlike a simple blend, it lets you inject the perfect amount of modulation without ever losing your core dry signal.
- Rate: Governs the speed of the Sine-wave LFO. From a slow beautiful sweep to a fast watery pulse.
- Width: Controls the depth of the pitch modulation. At lower settings, it adds a delicate thickening; at higher settings, it provides a deep, nautical warble.
- Offset: Adjusts the pre-delay of the chorus. This ensures the modulated signal never "crosses" your dry signal, preventing thin-sounding phase issues and adding a massive sense of space.
- X-Over: The secret weapon. This sweepable high-pass filter (50Hz to 600Hz) keeps the effect away from your low-end fundamentals. Dial it in to keep your "thump" clean while your higher frequencies are effected!
Details
- Vendor
- Dirty Boys Audio
- Category
- Modulation & Pitch
- Type
- Chorus
- Price
- Free
- Tags
- chorus, modulation & pitch
- Listed
- Marketplace launch (KosmOS 1.14.0, Apr 2026)
- Updated

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