Description : Simply the most versatile and powerful analog-modeled polyphonic synthesizer ever created… PolyKB III captures the sound and spirit of RSF’s legendary PolyKobol 2 polyphonic synthesizer, including its most revolutionary feature: Morphing analog oscillators.
This sets it apart from all other popular analog synthesizers, as you have instant access to hundreds of different analog models and free-running oscillator signals. More than other synthesizers, including those that offer switching between oscillator models. The icing on the cake: they can be dynamically modulated by multiple sources.
Get your voice on!
It wouldn’t be a XILS-Lab instrument if it didn’t have innovative and exclusive features like voice-based modulation mechanisms or a giant step modulator that bring it into the 21st century.
Make every note unique
Voice XY is a Per Note Quad XY modifier. You can control up to four different parameters in a two-dimensional square, creating subtle to dramatic variations for each new note.
Manipulate sound in 3D space
With the Space XY module, you can place every note in a 3D stereo space, creating stereo scenes unachievable with any external effects. What’s more, you can make them move using chaotic functions, adding incredible realism to your sounds. Never before have you had such artistic control over the stereo field.
By combining these two Per Note modifiers with the True Unison engine, you’ll quickly create stunning, dense, and breathtaking sounds that will immediately take center stage in your mix. Control is as simple as placing and moving the balls representing the voices within a square. So simple, so direct, so enticing, and so powerful!
Hypermodulation
The Polysequencer can now be used as a giant step modulator-sequencer with 128 steps, 4 lines, and 16 directions, allowing you to create not only the most detailed TranceGate patterns, but also slides or incredible rhythmic patterns. Or all at once. Or something completely new.
Functions
- 3 Morphing Oscillators
- 2 Creamy 0df Multi-Mode Filters
- 3 Envelopes,
- 2 LFOS
- Polysequencer, Arpeggiator, Vintage FX
- Unrivaled Analog Presence and Feel
- Future-Ready Tech: Hundreds of Modulation Possibilities, Including 2 Unique
- Modulators Per Voice, Ultra-Large Step Sequencer, and Two Modulation Matrices
- Three Non-Optic Morphing Oscillators: From Triangle to Pulse, Through Sawtooth.
- Two 4-pole multimode self-oscillating filters
- Three loop envelope generators (ADSR)
- Two MIDI-synced LFOs
- One MIDI-synced sample and hold
- One 128-step polyphonic sequencer/Trance Gate sequencer/phrase player
- One per-voice VoiceXY modulator
- One per-voice SpaceXY Spatializer
- One hardware macromodulation matrix
- Single-user macromodulation matrix
- One arpeggiator (monophonic and polyphonic)
- Four vintage effects
- Six Mono/Unison/Poly play modes with up to 16 voices of polyphony
- All parameters are MIDI controllable

- Download XILS-lab polyKB III v.3.6.4 VSTi, VSTi3, AAX x64 [09/21/2025](R2R)
- Original Publisher: XILS-lab
- Version: 3.6.4
- Format: VSTi, VSTi3
- Category: Virtual instruments and synthesizers
- Require: Windows 10
- License type: Full
- Download Size: 241.2 MB