KX77FREE Kx-Modulad

KX77FREE has released version 2.21 of Kx-Modulad, and version 3.2 of Kx-Synth-X16, two free synthesizer instruments for Windows.

Kx-Modulad is an analog modular synthesizer with stereo SF2 player and an additive synthesis WaveTracer to build high quality waveforms. 128 KX presets (70’s and 80’s).

Changes in Kx-Modulad v2.20/2.21

  • New classified presets.
  • Kx-Synth-x16’s LP12, LP 6 filters added.
  • Improvement of the Soft Sync (Vco2).
  • Internal presets management (fxb, fxp, copy, load, save).
  • Skin improvement: grey outlined and pop-up menus.
  • Power off to the Ring Modulator, Lfos, S&H, Noise and synchronized clocks.
  • Less CPU use in sleep mode.
  • Optimization of modulations to the Vcos, -15% of CPU use when all of them are used.
  • Less CPU use when the Prg Change works again.
  • The Fx decay did not stop during the Prg Change.
  • The filter selectors was alway on “R:LoM” (first preset).
  • Fixed bug: wrong Fx initialization in some case (2.20 bug).


Kx-Synth-X16 is a vintage modular polyphonic synthesizer, based on the the VCS3 structure.

Changes in Kx-Synth-X16 v3.2

  • Internal presets management (fxb, fxp, copy, load, save).
  • New parameter: “Mod” to use only one envelop.
  • Skin improvement with pop-up menus.
  • The synchronized clocks go in sleep mode when they are not used.
  • The envelop loop mode (“Lp”) could not be enabled when the envelop sustain.

Kx-Modulad and Kx-Synth-X16 for Windows (VST) are available to download at no cost.

More information: KX77FREE