PolyKB

The deal

$39 at KVR Marketplace (down from $159). That's 75% off - sale ends August 28, 2026.

What it is

PolyKB III is a polyphonic analogue synthesizer plugin from XILS-lab, modeled on the rare RSF PolyKobol 2 - a French instrument from the early 1980s that never reached wide production. It features three morphing oscillators, dual multimode filters with zero-delay feedback technology, and an extensive modulation matrix, delivering fat, warm analog character with genuine vintage personality.

Who it's for

Sound designers and electronic producers who want thick, warm polyphonic textures from a genuinely rare vintage source. This is a specific instrument with its own voice, not another generic analog emulation.

Key features

• Three morphing oscillators that shift continuously between waveforms for evolving, animated tones
• Dual multimode filters with 0dF (zero-delay feedback) technology for authentic, resonant analog filter response
• A 128-step polysequencer and full arpeggiator for building complex melodic and rhythmic patterns
• Per-voice modulators with hundreds of modulation routing options for deep, expressive sound design