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The PolyKB III is a virtual analog synth plug-in modeled on the rare RSF PolyKobol, a French analog poly from the early '80s. Its signature is two aliasing-free oscillators that morph continuously from triangle through saw to pulse, feeding a self-oscillating 24dB/octave lowpass filter. It adds a 128-step polyphonic sequencer, arpeggiator, chorus, delay, phaser and EQ. It suits producers chasing vintage French analog character and morphing textures that sample libraries rarely deliver, though it is a niche emulation rather than a do-everything workhorse.
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Lowest price we've seen: $39.00 on Nov 9 at Sweetwater. Tracked across 1 store since Nov 9.
Owners of the PolyKB line praise its warm, characterful tone and the morphing oscillators, which they say produce textures hard to get elsewhere. The sequencer and arpeggiator get credit for adding movement. Some find the interface busy and the effects dated.
The XILS-lab PolyKB III is a virtual analog polyphonic subtractive synthesizer plug-in. It is modeled on the RSF PolyKobol, a French analog synth from the early 1980s. It runs only as a plug-in and has no stand-alone operation.
The sound starts with two aliasing-free morphing oscillators that move from triangle to pulse through saw. This allows tones from PWM to more unusual tonal changes. The signal passes through a 4-pole, 24dB/octave lowpass filter that can self-oscillate. The filter is based on a standard analog chip of the '80s. A modulation section, chorus, delay, phaser and EQ complete the sound.
Two ADSR envelope generators, two MIDI-synced LFOs and a MIDI-synced Sample and Hold handle modulation. The synth has Mono, Unison and Poly play modes with up to 16 voices of polyphony. A polyphonic sequencer offers live recording, velocity editing and a step-play mode for playing chord patterns. An arpeggiator works in monophonic and polyphonic modes. All parameters are MIDI controllable.
