PolyKB III is a polyphonic synthesizer inspired by the legendary RSF PolyKobol 2, designed to deliver an authentic analog experience with modern enhancements. It features three morphing oscillators, two creamy multimode filters, and multiple envelopes and LFOs that provide rich, warm sound textures. The synthesizer offers a wide array of modulation options, including unique per-voice modulators, a large step sequencer, and multiple modulation matrices, allowing users to craft dynamic and evolving sounds with ease.

The instrument stands out with its per-note modulation capabilities, enabling each note to exhibit unique characteristics through the Voice XY quad parameter controller and the Space XY module, which places notes within a three-dimensional stereo field. These features, combined with a true unison engine, create dense, immersive sounds that can be shaped intuitively by moving controls in a spatial interface. The extensive modulation possibilities bring a new level of artistic control over tone, stereo imaging, and expression.

PolyKB III also integrates a powerful polysequencer and arpeggiator, offering 128-step sequencing with multiple modulation destinations for complex rhythmic and melodic patterns. Additional features include customizable macros, flexible play modes, syncable LFOs, polyphonic aftertouch, and a comprehensive preset management system. Vintage-modeled effects such as chorus, delay, phaser, and EQ enhance the sound palette, making this synthesizer a compelling tool for creating organic and expressive music that bridges analog warmth with modern technology.