Free Software Synthesizers

Rack

Rack is a free software synthesizer developed by VCV. Available format(s): for Windows, macOS.

VCV Rack is the engine powering VCV modules. Add modules, connect cables, edit parameters, and save/load patches. Create generative patches with your mouse, perform with your MIDI keyboard controller, or connect it to your favorite DAW using the VCV Bridge VST/AU plugin (coming soon).

In Rack, control voltages and audio signals are equivalent, so you can modulate parameters with sonic-range VCOs to create customizable FM synths or chaotic wave-shaping oscillators. If you already own a modular synthesizer, you can enhance your setup with an audio interface or a CV-MIDI-CV interface module with Rack’s CV Interface (coming soon).

Find out more at vcvrack.com.

https://vcvrack.com/

RA Mowg

RA Mowg is a free software synthesizer developed by Roberson Audio Synthesizers. Available format(s): VST for Windows.

RA Mowg is an emulation of a Moog Minimoog Model D. Another addition to the line-up of Roberson Audio’s collection of vintage replica synths, many many months have been spent to create an instrument that not only resembles the Minimoog in appearance, but delivers the same feel while playing. From the deep, full-bodied filters, to the mellow analog-style oscillators, to the distortive drive from feedback-looping the output, this instrument can give you the feeling of playing a Minimoog without spending a small fortune to do so. For more technical info and notes before playing the synth, see the ReadMe file.

http://www.robersonaudio.com

R2

R2 free software-synthesizer by KlangLabs

R2 is a free software synthesizer developed by KlangLabs. Available format(s): VST for Windows 64b.

R2 is a hybrid synth and effect processor, just assign a MIDI track to it to play notes and use an external source (preferably voice) to make the pitch change. You can achieve interesting sounds with this plug, besides the famous Star Wars R2-D2 blips you can use it as a synth and use your voice to make weird vibratos.

https://www.kvraudio.com/developer/klanglabs

Quatrix

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

As the name may imply, everything on Quatrix is in quadruplicate.

4 VCOs with individual EG pitch.

4 VCFs with individual EG.

4 VCAs with individual EG.

4 LFOs, 4 modulations and 1 supplementary EG.

Possibility of FM and Function “Synchro” between the 4 VCOs.

Flanger.

High CPU consumption.

http://perso.wanadoo.fr/MAOpassion/

Quark

Quark is a free software synthesizer developed by TorQue Audio. Available format(s): VST for Windows.

Quark is based on the Muon Atom Pro but is not an emulation. It’s suitable for synthetic basses.

http://sarvst.110mb.com/

Q

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

Q is a free synth VST Instrument for Windows.

2x virtual analog oscillators.

1x phase distortion oscillator.

1x FM-Oscillator containing 5 operators.

Oscillators can be routed to amp directly (pan for each oscillator), to filter 1, to filter 2 or to both (F). In filter 1 you can choose if the signal is routed to filter 1 and 2 in parallel (P), or if it first passes filter2, followed by filter 1 (S).

4 Envelopes (Modulation, Amp, Filter1, Filter2).

2 Filter (1x Lowpass, 1x Multi-mode, Dist/Shape, Pan, parallel or serial mode).

4 LFOs (all targets available, retrigger option).

4 Modulation sequencers (adjustable speed, target and amount, retrigger option).

Bitcrusher (lo-fi), Delay, Reverb.

Adjustable modulation-wheel targets.

LFO, Delay and Sequencers can run freely with adjustable speeds or be synced to the host’s or the selected tempo.

This is freeware, use it in your projects, spread it, recommend it if you like it. If you’d like to share your custom presets, please contact us.

http://www.xtrabits.de

PUSH

PUSH is a free software synthesizer developed by Sampleson. Available format(s): VST, Audio Unit for Windows, macOS.

PUSH. ONE BUTTON SYNTHESIZER.

Push is a generative synth sound module (and it’s free). It will create a new patch every single time you hit that button in the middle. Edit panel will allow you to fine-tune sounds. It’s free for every one, you grab your copy here

ONE BUTTON. A LOT OF LOGIC.

Push is a subtractive synth with a huge amount of randomness. Parametrized with a sound-design logic to get the most of the results to be usable as a patch. All of the randomized parameters are accessible via the “Edit Current” button.

You can use the patches as they are once you press the push button, or you can use the initial patch as inspiration to tweak each sound into a new and refined one.

Resulting patches and banks can be exported and shared without limits. Just click on “Open/Save” then “More” and “Export Bank” to get a shareable file.

VIDEO INTRO.

{See video at top of page}

AUDIO DEMOS.

https://soundcloud.com/user-830166644/sets/push-one-button-synthesizer

4K SCALABLE INTERFACE.

PRODUCT DETAILS.

-Polyphonic subtractive synthesizer.
-2 Oscillators.
-6 unisono voices.
-5 waveforms.
-4 filter types.
-2 LFOs.
-Effect section.
-Just 35 MB.
-Scalable HD interface.
-MacOS Catalina Ready
-Easy install.
-No extra purchases needed (like Kontakt, UVI, etc) or any other 3rd. party player.
-Ready to be loaded into major DAWs (Cubase, Logic Pro, GarageBand, Cakewalk, Reaper, BitWig, Nuendo, FLstudio, etc)
-Win 32/64-bits and Mac VST/AU/Standalone versions included
-About ~65MB installed.
-No online activation required.

http://sampleson.com

Purple

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

Purple is a 4 operator FM synth.

Features:

4 Operators with 8 routings. Each Operator has:

An envelope with hold, attack, hold2, decay, sustain, release, level, time.

Negative / Positive option.

Octave from -6 to 3.

1 note tune.

Fine tune.

Waveforms: saw/sine/pulse/triangle/ramp.

One curve option for all Operators.

Two filters with the same envelopes, negative / positive option, curves, cutoff and resonance. Filter types: lowpass, hipass, bandpass (and bypass option).

1 Volume envelope.

1 Modulation envelope with BPM retrigger option for cutoff and pitch.

2 small BPM LFO parts for phase modulation of Operator 2/3/4 and cutoff 1 and 2.

Effects: Simple panner, Chorus, Flanger, BPM stereo delay.

Extra Phase modulation depth control.

Master volume.

Glide.

Retrigger.

Mono Mode.

128 presets.

https://theodosynthsarchive.wordpress.com/

Puncho Groove

Puncho Groove is a free software synthesizer developed by Fsynthz. Available format(s): VST for Windows.

Puncho Grooove is a VSTi that can convert anything the user plays into a groove that subsequently follows the player in real-time. It can be used as a backing rhythm (e.g. a drum box).

Punch Groove uses continuous punch-in MIDI recording and looping together with “timbre rambling”. Pitch and Modulation controllers can alter the groove. Events can be quantized for the trance/dance domain.

Controller keyboard can transpose the current groove, loop and chords can be triggered with one finger, and patterned (and synced) pitch-bend and vibrato can be added to a melody. Puncho Groove can also be used as a MIDI processor to drive another synth.

Features:

Interactively updated loop.

Quantization in real-time.

“Timbre rambling” (see “MoarF”).

Hand Morph mode.

Freeze control.

Transpose mode.

Definable MIDI key to enter pauses (“playing silence”).

Definable MIDI controller to change the loop in real-time.

Background mode: Play in parallel with another synth.

Compact GUI.

CPU-friendly.

MIDI output.

http://www.fsynthz.com

PULS

PULS is a free software synthesizer developed by de la Mancha. Available format(s): VST for Windows.

PULS is a monophonic pulse wave synthesizer with simple controls but complex sounds. From two pulse wave oscillators you can get chunky basses, scorching leads, retro chiptune, dusty lofi and oddball noises. With an unusual isometric pixel-art interface, what it lacks in knobs, it makes up for in sound.

It features custom pulse waveforms, unison, oscillator sync and ring modulation for some big ‘n’ dirty sound potential, with a tempo-sync LFO for pulse width modulation (PWM) as well as detune and volume modulation.

Features:

Monophonic pulse wave synthesizer.

2 oscillators with custom pulse waveforms:

Adjustable Pulse width, modulated by LFO (per osc).

Unison per oscillator.

Oscillator sync and ring modulation between oscillators.

Adjustable non-linear Release.

Tempo-sync LFO with 4 waveforms with adjustable speed and depth:

Pulse width modulation per oscillator.

Detune and volume modulation.

Tempo-sync arpeggiator with 6 patterns:

Arp can cover 1 to 4 octaves, synced to host (1/32 beats to 4 beats).

Adjustable note length (0-100%).

32 presets covering different styles and functions.

https://delamanchavst.wordpress.com