Unknown Synth

Unknown Synth free software-synthesizer by Odo Synths

Unknown Synth is a free software synthesizer developed by Odo Synths. Available format(s): VST for Windows.


  • 2 oscillators plus 2 for the phase modulation.
  • The first oscillator has detune and octave settings.
  • The 2nd also has detune.
  • Every osc has his own phase mod depth, the phase mod also has octave settings and you can choose note tune or normal tune.
  • 2 filter ADSRs with low/hi band and 4pole.
  • BPM filter sync or free.
  • BPM panner sync or free.
  • Bass Boost.
  • 2 BPM delays.
  • 128 presets.
  • The sequencer can control octaves or filters.
  • Trancegate.
  • Arpeggiator.
Made with SynthEdit



Temper free distortion by Creative Intent

Temper is a free distortion VST, VST3, Audio Unit plugin developed by Creative Intent. Compatible OS(s): Windows 64b, macOS.

Temper is a modern digital distortion plugin which combines a rich saturation curve and a unique phase distortion, with a resonant lowpass filter at the beginning of the signal chain and a feedback loop through the distortion stage.

Temper’s phase distortion offers unique harmonic excitement in the higher frequency components of your sound, bringing character and clarity to any element of your mix. And with a classic overdrive and versatile resonant lowpass pre-filter, Temper delivers a modern tone that brings an all new edge to your sound.

This is our first plugin, and the source code is available under GPLv3.



Sinthecyza!2 free software-synthesizer by Sonic Assault

Sinthecyza!2 is a free software synthesizer developed by Sonic Assault. Available format(s): VST for Windows.

  • Dual PD oscillator synthesizer.
  • 4 patchable host synced LFOs.
  • 4 patchable HAHDSR envelope generators with LFO timed triggering and output level control.
Made with SynthEdit



PolyDPO free software-synthesizer by Jeff51

PolyDPO is a free software synthesizer developed by Jeff51. Available format(s): VST for Windows.

  • 3 Distortion Phase Oscillator.
  • 2 VCF (parallel or serial).
  • 2 VCA, 4 LFO (sync).
  • 2 supplementary envelopes for modulation .
  • 1 section Flow for the DCO and VCF.
  • 1 section Granular.
  • Fx: Chorus, 2 Delays (manual BPM) , Badhead (soft distortion).
Made with SynthEdit



NitrousPD free software-synthesizer by NOVAkILL

NitrousPD is a free software synthesizer developed by NOVAkILL. Available format(s): VST for Windows.

NitrousPD is the second part of NOVAkILL’s “Nitrous Project”. It is a Phase Distortion synth with a full subtractive [virtual-analogue] signal path and a wealth of modulation options. Its super-compact UI is designed to maximise workflow without making it too hard to work with, thanks to large, well-spaced knobs and obvious, simple to use minor controls.

Its main features are:

  • SynthEdit’s standard Phase Distortion Oscillator with two wave generators, each offering 7 different waveforms.
  • State-Variable filter with Low Pass 12 and 24dB/octave and 12dB/octave High Pass, band Pass and Band Reject modes.
  • Two ADSR envelopes, both with multiple interpolation modes [slope] with looping on the modulation envelope only.
  • Tempo-synced LFO with 5 modulation destinations [3 available simultaneously].
  • Randomator modulation source for more natural sounding patches.
  • VCA with Mono/Poly modes and Portamento [mono mode only].
  • Extensive routing for velocity modulation and Mod Wheel control.
  • 16-step programmable Gate Modulation source, assignable to phase mod, filter cutoff and volume [trance-gate].
  • New RARP uses the Gate sequence to create random note variations over a user-definable range [0 to 2 octaves].
  • Overdrive effect.
  • MIDI “Learn” eliminates the need for MIDI CC assignments.
Made with SynthEdit


Mothman Z3000

Mothman Z3000 free software-synthesizer by Demonic Sweaters

Mothman Z3000 is a free software synthesizer developed by Demonic Sweaters. Available format(s): VST for Windows.

Mothman Z3000 is a 16 voice polyphonic synthesizer that features two Phase Distortion DCOs, two DCWs, and two DCAs. All six feature the famous 8 point envelope section that made the CZ synthesizer so famous.

The Mothman Z3000 also features stereo chorus, noise and LFO just like the original CZ-3000. There’s also an added switchable velocity feature that gives greater expression than the original CZ, and an added analog style filter on DCA2 to give even more sound options. You can also pan the different DCOs to give more stereo fx.

Programming is very similar to the original CZs, the only difference being that on each 8 stage envelope there is a “scale” feature, which acts like a master envelope control to quickly lower or raise the length of the envelope all around without changing each one individually. The original Casio CZ-3000 Manual can be used to understand the concepts behind programming this plug-in.

There are 64 preset slots with 18 presets already created.

Made with SynthEdit


Iridesynth’s Revenge

Iridesynth's Revenge free software-synthesizer by NOVUZEIT

Iridesynths Revenge is a free software synthesizer developed by NOVUZEIT. Available format(s): VST for Windows.

Iridesynth is a stereo virtual analog subtractive synth designed to provide “entertainingly unique tones” with fast and simple programming. It is capable of strong classic analog sounds, retro vintage video game arpeggios and other useful traditional tones as well as “futuristic unheard of sounds”.

Iridesynth features Additive Feedback Harmonics, self-modulating LFO parameters, multiple ADSRs, and seven range octave support. It also includes a powerful Global FX section with effects such as bit reduction, stereo flanging, microdelay, stereo reverb, and even psycho-modulation. There are eight configurable effects in all, each with two configurable parameters. Plus, Iridesynth’s GUI allows realtime manipulation of its interface’s color scheme.

Iridesynth’s Revenge expands upon this original concept of an all around “workhorse synth”, capable of leads, pads, and textures. It accomplishes this by incorporating many changes, including:

  • Dual Phase Distortion oscillators replace old Subtractive synthesis ones.
  • Iridesynth’s Revenge uses less than half the CPU power of the first Iridesynth.
  • No more key-to-note latency.
  • Now two forms of Arpeggiator available: Note-Arp / Glide-Arp.
  • Four Waveshapers enhance Phase Distortion capabilities.
  • Completely new Global FX section; includes Comb Filter, BitCrush, Multi-Delays and more.
  • Over 30 LFOs for extensive parameter automation capability.
  • Completely redesigned Iridescence FX section for enhanced GUI alteration ability.
  • Over 100 presets.
  • Completely rewritten very extensive user manual.
Made with SynthEdit



iDkILLER free software-synthesizer by NOVAkILL

iDkILLER is a free software synthesizer developed by NOVAkILL. Available format(s): VST for Windows.

iDkILLER is a 16-note polyphonic synth that uses a single Phase Distortion Oscillator in place of the standard oscillator/filter, coupled to a powerful mono/poly UNISON set-up. It is designed for EBM/Industrial music but is versatile enough to be used anywhere.


  • 1 x Casio-style Phase Distortion Oscillator [2 simultaneous waveforms].
  • UNISON mode allows stacking of up to 16 voices with detune/depan [mono/poly operation].
  • 6 stage Modulation Envelope with invert switch.
  • BPM-synced LFO with 6 waveforms, including Sample & Hold, and 2 simultaneous destinations.
  • Monophonic/Polyphonic operation.
  • Portamento [mono only].
  • Miniature keyboard with toggle mode.
Made with SynthEdit


Genobazz R

Genobazz R free software-synthesizer by Tek'it Audio

Genobazz R is a free software synthesizer developed by Tekit Audio. Available format(s): VST for Windows.

Genobazz R is the first anniversary edition of the free monophonic bass synthesizer plugin Genobazz, with more bass, more acid, more fat sound, inside.

We added, envelope modulation to the filter, an envelope decay, a filter drive, a BIGGER user interface and numerous improvements over the original Genobazz.

Feature highlights:

  • 8 Waveforms: saw, square, pulse, double sine, saw-pulse, reso1, reso2 and reso3.
  • 8 Filter types: 24dB Fat low-pass, 24dB low-pass, 24dB VCF Ladder, Modulo Filter, 36dB State Variable, Fat filter, 12dB High-pass, Band pass.
  • Envelope attack, decay, glide and retrigger.
  • Full MIDI automation support.
  • Easy MIDI learn on all parameters.
  • Use 7-bit MIDI Continuous Controller or High resolution 14-bit MIDI NRPN and RPN.
  • Maximum MIDI pitch bend range selector.
  • 2 Waveforms modulation types.
  • Filter envelope modulation.
  • Sub amplification boost.
  • Integrated Preset manager, rename, copy, save, load…
  • Undo your changes to initial preset value.
  • One click randomize for all parameters.
  • 50 Factory sound presets.
  • Up to 128 user presets per bank.
Made with SynthEdit



EGOkILLERversion2 free software-synthesizer by NOVAkILL

EGOkILLERversion2 is a free software synthesizer developed by NOVAkILL. Available format(s): VST for Windows.

EGOkILLERversion2 is a Phase Distortion based synth with dual filter set-up.

Main Features:

  • Phase Distortion oscillator with Velocity and Envelope modulation.
  • Dual filter with 12dB/octave Low-Pass and High-Pass filters in series.
  • 2 Graphical ADSR Envelopes [modulation and VCA].
  • Tempo-synced LFO with 16 waveforms and two assignable destinations.
  • Overdrive effect.
Made with SynthEdit