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Vintage Polyphonic Synthesizer

One of the most versatile and powerful analog modeled polyphonic synthesiser ever produced.

The iconic RSF PolyKobol 2 polyphonic synthesizer's tone and vibe, as well as its most ground-breaking feature: morphing analog oscillators, are faithfully reproduced in the PolyKB III.

Morphing analog Oscillators sets PolyKB III apart from other analog synth emulations. You have instant access to hundreds of different analog modeled free running oscillators waveforms, far more than other synthesizers, including those that switch between oscillators sets. The icing on the cake is they can be dynamically modulated by a mulitude of sources.

In addition you get two gorgeous, creamy multi-mode filters, self-resonating in all modes, and Xils exclusive '0df' technology. There are also three Analog modeled envelopes, with time multiplication, and great looping capabilities. Two complex LFOs are available with MIDI sync capabilities. All working to deliver a fat, warm and immediately inspiring analog sound.

PolyKB III comes with PolyKB II included!


A Modulator for Each Voice

It wouldn’t be a XILS-lab instrument if it didn't have innovative and exclusive features like each voice having its own modulation engine, or a giant Step Modulator, to propel it into the 21st century. You can make each note sound different : The Voice XY is a single Note Quad XY modifier. You have total control over the creation of subtle or wild variations for each note in a 2D square with 4 different parameters.

Create your own 3D Space : With the Space XY module, you can place each note in a three dimensional space, and build stereoscapes that no other effect can achieve. On top of that, you can make it move with the inbuilt chaotic functions, adding incredible life to your sounds. You have never had so much artistic control over the stereo field.

If you combine these two Single Note modifiers with the True Unison engine, you’ll soon get amazing, dense, and breath-taking sounds, that will proudly take their place in a mix immediately. Operating it is easy, you simply place and move control points of the voices, in the square. Very simple, immediate and powerful!

Hyper Modulations : The Polysequencer can now be used as a 128 steps, 4 lines/16 destinations giant Step Sequencer Modulator, allowing you to sculpt not only the most detailed TranceGate patterns, but also Slides or incredible rhythmic patterns. Or modular anything with anything you want, you choose.

Everything is here to allow you to create fully organic and expressive presets. PolyKB III is the ultimate blending of analog authenticity and powerful modern technology.

Product Features

  • Three aliasing-free morphing oscillators: from triangle to pulse, through saw

  • Two 4 poles Multimode self-oscillating filters

  • Three Loopable envelope generators (ADSR)

  • Two MIDI syncable LFOs

  • One MIDI syncable Sample and Hold

  • One 128 steps polyphonic sequencer/Trance Gate Sequencer/Phrase Player

  • One Per voice VoiceXY modulator

  • One Per voice SpaceXY Spatializer

  • One Hardwired Macro Modulation Matrix

  • One User Macro Modulation Matrix

  • One Arpeggiator (monophonic and polyphonic)

  • Four Vintage effects

  • Six Mono/Unison/Poly playing modes with up to 16 voices of polyphony

  • All parameters are MIDI controllable

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The following reviews have been placed by customers who also bought this product from us. All reviews are provided through eKomi, Europe’s largest independent customer review company.

5.0 of 5  
09.01.2024 Language: englisch

Very good. XILS-lab rock.



  • macOS 10.9 or higher
  • Intel & Silicon Support (under Rosetta)
  • 64 bit


  • Windows 7 or higher
  • 32 & 64 bit
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XILS-lab products require you to register with the manufacturer at www.xils-lab.com as well as with www.ilok.com and my.plugivery.com/redeem to activate your license.

This product requires an activation!

You can either "soft" activate on your computer without addditional hardware or transfer the license to an iLok USB dongle which has to be purchased separately. The iLok dongle can be used to run the protected software on different computers. Your licenses can be easily manged using the iLok Licence Manager. To protect your investment against theft or loss we recommend the iLok Zero Downtime protection with TLC.

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