Free Software Synthesizers

FB-3300

FB-3300 is a free software synthesizer developed by Full Bucket Music. Available format(s): VST, Audio Unit for Windows 64b, macOS.

The FB-3300 is a software instrument for Microsoft Windows (VST) and Apple macOS (VST/AU) simulating the KORG PS-3300 Polyphonic Synthesizer from 1977. It is written in native C++ code for high performance and low CPU consumption. Main features are:

Close emulation of behavior and all controls of the original hardware.

Three independent polyphonic synthesizer blocks.

Band-limited oscillators, classic two-pole lowpass filters.

Resonators section plus two Modulation Generators per bank.

Additional Sample & Hold and paraphonic Envelope Generator.

Semi-modular.

Micro-tuning option.

Additional tweaks.

MIDI Learn – all parameters can be controlled by MIDI CC.

Plug-in supports Windows and macOS (32-bit and 64-bit).

https://SoundCloud.com/full-bucket/fr33ze

http://www.fullbucket.de/music/vst.html

FB-3200

FB-3200 is a free software synthesizer developed by Full Bucket Music. Available format(s): VST, Audio Unit for Windows 64b, macOS.

The FB-3200 is a software instrument for Microsoft Windows (VST) and Apple macOS (VST/AU) simulating the KORG PS-3200 Polyphonic Synthesizer from 1978. It is written in native C++ code for high performance and low CPU consumption. Main features are:

Close emulation of behavior and all controls of the original hardware.

Band-limited oscillators, classic lowpass filters.

Equalizer section.

Two Modulation Generators, Sample & Hold.

Paraphonic Envelope Generator.

Semi-modular.

Micro-tuning option.

Additional tweaks (4-pole lowpass, Resonators, Velocity).

MIDI Learn – all parameters can be controlled by MIDI CC.

Plug-in supports Windows and macOS (32-bit and 64-bit).

SoundCloud.com/full-bucket/blur

http://www.fullbucket.de/music/vst.html

Fauna

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

Fauna is a simple waveguide model of the vocal tract intended to provide a flexible platform for the synthesis of abstract and animal voices.

Waveguide synthesis is a physical modeling technique that makes use of delay lines to model the transmission of acoustic vibrations. A sample rate of 44.1kHz translates to a distance of less than 1cm under normal atmospheric conditions, so modern computers can achieve a degree of accuracy in acoustic modeling.

The delay bore is divided into five sections. Reflection coefficients control the transmission between segments, which effectively emulate the area of the tract at each position. Kelly and Lochbaum developed this speech synthesis technique in 1962.

Unlike conventional speech synthesizers, which use the tract to add formants to an oscillator, the fundamental pitch is determined by the overall form of the model.

The glottis acts like a reed, opening with air pressure from the lungs (determined by a pressure coefficient) and closing with air reflected back from the mouth. The position of the glottis is a result of these and other forces, such as tension and springiness of the muscle tissue.

Oscillation is produced by the balance of pressure waves in the tract and their effect on the glottis; as the size of the aperture changes, so do its properties of transmission and reflection.

Fauna VST uses four sets of five reflection coefficients to describe the shape of the vocal tract. Four 16-stage graphic envelopes and three dual-contour LFOs are applied to the tract coefficients. A bank of nine sends and two ‘splits’ route modulators to parameters as groups to assist in the emulation of organic forms.

The structure is not complex enough for speech, keeping in mind that the five coefficients describe the contour of the throat from the glottis and not from the back of the mouth. It may surprise you how many sounds it can create given the low waveguide count.

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

Fathom Synth

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

{See video at top of page}

Computer Music Magazine

“This leviathan of a synth offers up an infinitely deep sonic playground that puts many a paid-for plugin to shame.”

“Fully modulator and flexible, Fathom CM has enough features to leave even seasoned synthesists gasping for air. Despite its bottomless potential, Fathom CM is really easy to ‘fathom’ with a sleek and intuitive interface that gives immediate and impressive results.” (CM June 2019 Page 65).

Fathom Version 2.33.0

Latest Features

Fathom Synth Website

www.fathomsynth.com

Supported Plugin Formats

Windows VST 32/64, Mac AU/VST 64.

Features

Modular Signal Flow, 16×16 Wave Table Morphing, Free Hand Wave Draw, Bezier Curve Oscillator, Single Cycle WAV Import Export, 5 Alias Free Oscillators, 30 Filters, 8 Effects, Bezier and Exponential Envelope Curves, Unlimited Modulations, 7 Types of Modulators, Real-time Host Automation, Resizable GUI, Free Mono Version, Direct Email Tech Support, Windows and Mac compatible.

Fathom Reviews

BPB Top 50 Free VST Plugins of 2017 (Fathom #3)

Bedroom Producers Blog Fathom Review

Fathom 3D Wave Table Modulation

Fathom Synth

Fathom is a new modular software synthesizer specializing in original waveform development, complex modulations and advanced wave table processing.

Wave Table Morphing Oscillator

Two morphing tables of 16 waveforms each with modulating wave indexes for real-time wave scanning.

The ability to modulate and morph between two tables creating a 3D wave space.

Waveforms in the second table can be added or subtracted from the first.

Algorithms include morph, add and subtract, unipolar, bipolar, chop.

Animated graphs show the operand waveform, operator waveform and combination waveform in real-time.

Each waveform can be loaded or hand-drawn using the wave draw interface.

Waveforms can be auto-filled for perfectly smooth transitions between edited wave positions.

Individual waveforms can be saved and loaded, and entire wave tables can be saved and loaded.

Features

Fully modular signal flow.

The ability to draw your own waveforms.

7 types of oscillators.

Bezier Curve and Wave Draw Oscillators.

All oscillators include:

AM and FM synthesis.

Frequency ranged noise generator with built in filter.

Harmonic and random distortion section.

Detune section with nonlinear modulations and built in chorus.

32 types of filters.

8 effects: mixer, two chorus, three reverb, phaser, 3 channel digital delay with built-in filters and multiple sends.

Modulators: LFO, LFO Draw, ADSR, Multisegment Envelope, Sequencer, Random Sample and Hold, Keyboard Tracking and MIDI control, with up to 64 segments per envelope.

Modulation matrix: unlimited modulations per dial, unlimited dials per modulation.

Exponential and Bezier envelope curves.

The ability to export your own waveforms to WAV format (pro version only).

Host automation of virtually every control on the instrument.

Over 500 factory presets and 200 waveforms.

KVR Marketplace Purchasing Instructions

https://www.fathomsynth.com

F2FM

F2FM is a free software synthesizer developed by anosci. Available format(s): VST for Windows.

F2FM is an FM synth that places a filter before the modulator. It’s designed for bass sounds with interesting modulation options.

Features:

23 waveforms to select from.

2 operator oscillators with individual filters, which can be mixed before being sent to the modulator oscillator.

Individual detune for all 3 oscilators.

FM and PM mode.

A comb filter for distortion.

http://anosci.net/vsts.html

EZ-Poly

EZ-Poly is a free software synthesizer developed by Krakli. Available format(s): VST for Windows.

EZ-poly has an 8 step analog sequencer which syncs to your hosts tempo, or can be stepped with each new note, creating some fantastic tones and note-runs.

EZ-poly comes equipped with 30 presets from Tim Conrardy showing this synth off to its fullest.

http://www.krakli.com

Explor3r

Explor3r is a free software synthesizer developed by The Lower Rhythm. Available format(s): VST for Windows.

Designed specifically for the KVR Developer Challenge 2009, Explor3r is a three oscillator monosynth with channel-dedicated amplitude envelopes, lowpass filters and LFOs, all glued together with a matrix that allows both phase modulation and sync inputs on each oscillator to be fed by the output of any other oscillator (including itself). With the addition of global texturizing (tube saturation and noise w/high cut) and delay, Explor3r can create anything from fat, complex leads to droning sound effects and terrible, screeching chaos.

Explor3r features 3 oscillators with dedicated envelopes, tuning, filters and LFOs, 3×3 modulation and sync matrix, tube output & noise mix for texture and global delay.

http://sprouthousepdx.com/tlrvst/

Example Synth

Example Synth is a free software synthesizer developed by SK. Available format(s): VST for Windows.

Example Synth is a very basic (user interface wise and synth-engine wise) FM synthesizer created as an example of Stefan’s Jewel user interface framework. It may not be too useful in its current state as there are some common features missing (e.g. no MIDI controller support yet) and it may still contain some bugs.

http://www.jewe.org/

EX-096

EX-096 is a free software synthesizer developed by djodin. Available format(s): VST for Windows.

Features:

3 Oscillators, each with ADSR Envelope.

2 LP, HP, BP, BR Filters.

3 Tempo Synced LFOs.

http://www.djodin.com/

EX-024

EX-024 is a free software synthesizer developed by djodin. Available format(s): VST for Windows.

EX-024 is a 2-Oscillator synth with a Low-pass filter and ASDR envelope.

http://www.djodin.com/