Free Software Synthesizers

UNO Synth Editor

UNO Synth Editor is a free software synthesizer developed by IK Multimedia. Available format(s): VST, VST3, Audio Unit, AAX for Windows 64b, macOS.

The UNO Synth Editor is a plug-in and standalone app that lets you access all the parameters of IK’s groundbreaking UNO Synth, the real analog synthesizer for everyone. The Editor lets you go beyond the front panel controls and access deeper programming settings like full 4-stage ADSR envelopes for both filter and amplitude, pulse width and waveform shape modulation of the oscillators, modulation wheel assignments, velocity control and much more. The Editor does not make sound on its own. Rather, it is a controller for the UNO Synth hardware that gives you remote control of this innovative instrument from your computer or mobile device.

The UNO Synth Editor works as a standalone application on iPhone and iPad, but on Mac and PC something special happens: in addition to a standalone application, the UNO Synth works as a plug-in inside your favorite DAW.

This means that you can program and play the UNO Synth just like a virtual instrument with total recall, so the Editor will recall its previous settings each time you open an older session. And it’s freely resizable, so you can adjust the screen size to fit your workflow.

Enjoy the convenience and flexibility of plug-ins, but with the massive advantage of real analog synthesizer sound. With UNO Editor, you can take your music production to the next level faster than you ever imagined working with an analog synth could be.

http://www.ikmultimedia.com/

Uno FM

Uno FM is a free software synthesizer developed by Synthtronic. Available format(s): VST for Windows.

Features:

8 Note Polyphonic.

128 Presets.

5 Oscillators:

1 Sine (Carrier).

3 Sine (FM Modulation).

1 Ring Modulation (Various waveforms).

OSC Modulation Amount.

OSC Tuning, Fine & Vol with readouts.

Ring Modulation Amount.

OSC MIX (Normal-Ring).

Sync On/Off.

1 LFO:

Speed.

Aftertouch.

Wheel.

VCO.

2 ADSR:

FM Modulation.

VCA.

Level out with VU Meter Key Tracking (Fixed).

High Pass Filter.

Effect:

Stereo Chorus engine with small delay (0-200 ms).

Modulation Depth.

Modulation Speed.

Arpeggio: (lots of features).

Velocity: (Variable).

Bend Range 1-12.

Portamento (Variable).

Mono (On/Off).

Retrigger (On/Off).

Transpose +/- 5 Octaves.

MIDI Receive Channel.

128 Patches.

http://www.xsynth.com/

Unknown Synth

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

Features:

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.

https://theodosynthsarchive.wordpress.com/

Unknown64

Unknown64 is a free software synthesizer developed by Odo Synths. Available format(s): VST for Windows.

Unknown 64 is a single oscillator synth designed to recreate the “classic” Commodore 64 sounds.

Features:

Vibrato.

PWM uses ADSR/Osc or both.

Low Hi Band Filter.

Auto panners.

Ring Modulator.

Arpeggiator with an end step and a wavetable.

https://theodosynthsarchive.wordpress.com/

Unknown 64 Pro

Unknown 64 Pro is a free software synthesizer developed by Odo Synths. Available format(s): VST for Windows.

Unknown 64 Pro is a single oscillator synth designed to recreate the “classic” Commodore 64 sounds.

Features:

Single oscillator

4 waveforms (triangle, pulse, saw and noise).

A filter envelope with 3 filter types (lowpass, bandpass and hipass).

A pitch envelope / pulsewidth envelope and volume envelope.

Every Envelope can be inverted and has 13 different curves.

A ring-modulation oscillator or a ring-modulation BPM LFO.

A BPM LFO for the Pulsewidth, cutoff and oscillator pitch.

3 big sequencers for creating the real c64 arps and percussions:

One is used for the octave and notes.

One only for octaves.

One for the waveforms.

All 3 sequencers are BPM sync with speeds from 1/16 to 1/128. They can be ended at every step or looped.

Vibrato, bitcrusher, MIDI learn and panner.

Envelope restart / pickup.

128 presets.

https://theodosynthsarchive.wordpress.com/

Unit 1

Unit 1 is a free software synthesizer developed by GTG Synths. Available format(s): VST for Windows.

Features:

Unison oscillator. Stack up to 8 oscillators and detune these for really fat basses and leads.

LFO with key track.

Ring Modulator (Controlled by mod wheel).

http://www.gtgsynths.com/

Unifyer

Unifyer is a free software synthesizer developed by Angular Momentum. Available format(s): VST for Windows.

Features:

16 Voice Unison Monophonic Synthesizer.

2 x Stereo Unison oscillators with 68 Waveforms.

Up to 8 uni voices per oscillator.

4 x 24db Multi mode Filters.

2 x Amp ADSR.

2 x Filter ADSR.

2 x LFO with BPM Sync and multiple routing options.

Phrase Arpeggiator with 128 note memory.

Groove Control.

CV Step Sequencer with multiple routing options.

3 band EQ.

32 Patches.

http://www.amvst.com/

Unicycle

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

By Spacedad and Mbreges.

An 8-Bit Polyphonic Sample-Based Synth with 300 four-cycle waveforms.

Inspired by Niffla‘s Fourcycle Synth.

Controls include ‘drawable’ ADSR Drawbars which are connected to:

Amp, Pitch, Filter and Badness.

Double LFOs for poly-rhythmic effects can be tempo-syncable or free running.

LFOs can be subtle or can achieve extreme speed taking it into self-oscillation.

Sample Rate/Bit Reducer.

Low-pass Filter.

Decimator.

originally entered into the KVR Developer Challenge 2009.

NEW updated version 0.14 is now tuned correctly (for old projects please tune down -9 semi-tones).

http://www.spaceraiders.co.uk/spacedad.html

ULTRAkILLER

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

ULTRAkILLER is a two oscillator Virtual Analogue synth with the following features:

Each oscillator gives a choice of 3 oscillator types:

BASIC oscillator is just that with 7 waveform choices.

UNISON oscillator has 11 waveforms and built-in Unison [low CPU use].

SPECTRAL oscillator is a high quality additive oscillator.

Unison mode with up to 7 voices.

Oscillator Hard Sync.

Two State-Variable Filters with complex stereo routing options and mixable Low-Pass, High-Pass, Band Pass and Band Reject filter modes.

2 x 6-stage Modulation Envelopes with looping and assignable interpolation modes.

2 x tempo-synced LFO.

2 x Randomators [accessed from Mod Matrix].

Dedicated ADSR envelope for VCA stage.

2 separate overdrive stages, one per oscillator and one post-VCA.

Built-in Gate effect.

8-slot Modulation Matrix.

Full MIDI CC implementation.

http://www.novakill.com/

U.F.O. Zone Edition

U.F.O. Zone Edition is a free software synthesizer developed by VST Zone. Available format(s): VST for Windows.

U.F.O. Zone Edition is upgraded version of original U.F.O. plugin with some updates, improvements and fixes. It is a subtractive synthesizer with three oscillators. Two of them have mutual filter, in which the frequency of oscillators is modulated by two LFOs. Third oscillator has independent filter, in which the frequency is modulated by three LFOs, two of which are graphical. Final sound is adjusted by kit of effects (delay, chorus, reverb), which is applied for each group of oscillators apart. Our intention was to reduce CPU usage and to make clean and simple user interface. U.F.O. ZE includes many presets, which can be extended by preset randomization function. Additional presets can be expected in future updates.

Change log for version 1.3.1:

Fixed audio buffer overflow bug that occur during randomization.

Fixed bug that can cause plugin to hang your DAW.

U.F.O ZE now includes 160 presets.

Change log for version 1.2:

NEW 12 LFOs: based on Ikeda map, Lorenz attractor, Rössler attractor.

NEW 3 random LFOs: random Sine, Saw and Square.

NEW 2 noise generators in all OSC including LFOs.

NEW presets (total 98).

NEW 27 filters (total 32).

Optimized LFOs (include graphic/step LFO).

Optimized chorus effects (50% improved performance when both chorus are active).

Optimized many small modules.

Optimized and adjusted UI (less memory usage).

Optimized, adjusted and decreased frame rate of all scopes, lower overall CPU usage about 20-30%.

For .EXE version only – Added virtual piano keyboard.

Notice: Presets from previous version are not fully compatible with new version because of new features incorporated in this update. If you already created your own preset with previous version you can send it to us and we will convert it for you. The same difference is between new version 1.2 and its special extension.

Demo music made with U.F.O. ZE (7 instances) and Amplio 2
https://soundcloud.com/trojakew/disorder

http://www.vstzone.sk