Open-Source Audio Plugins & Apps

A list of open source audio software projects (Apps, Plugins, Libraries and other resouces). The intent of this list is to catalog open-source audio apps, plugins (VSTs etc) or other resources which are either fully featured or are useful examples which have non-trivial features.

https://openaudio.webprofusion.com

Table of Contents

• Audio Plugins
• Collections
• Audio Apps
• Software Development Libraries
• Code Samples
• Open Data Resources

Contributing links

To contribute new links, fill out our issue template and the change will be prepare automatically and reviewed by an editor: https://github.com/webprofusion/OpenAudio/issues

Audio Plugins

Plugin	Description	Type	Framework
3HSPlug	GM/GS Compatible Multi-timbal 8-operator FM/PCM Syntheizer, uses 3HS88PWN4 (Fantasy sound chip) to make sound.	Instrument	JUCE
8ridgelite	8 string guitar virtual instrument	Instrument	JUCE
ADLplug	FM Chip Synthesizer — OPL & OPN	Instrument	JUCE
ÆLAPSE	ÆLAPSE is a delay and reverb plugin. The delay is based on tape-delay mechanisms, while the reverb is inspired by (but not limited to) spring reverbs.	Effect	JUCE
Aeolus	Pipe organ emulator using additive synthesis as a VST, AU, or CLAP plugin (or a stand-alone executable)	Instrument	JUCE
Airwindows	Various small and experimental effect plugins	Effect	N/A
ampli-Fe	Cross-platform VST2 plugin written in Rust	Effect	Rust VST
amsynth	Analog-modelling (virtual analog) synthesizer	Instrument	GTK
andes	Sound synthesiser plugin based on Perlin noise	Instrument	JUCE
Argotlunar	Real-time delay-line granulator	Effect	JUCE
Audible Planets	An expressive, quasi-Ptolemaic semi-modular synthesizer	Instrument	JUCE
Audio Effects	Plugins implemented from the explanations in the book “Audio Effects: Theory, Implementation and Application”	Effect	JUCE
Axiom	Axiom is an extremely flexible node-based realtime audio synthesizer. It was originally designed for size-constrained environments such as PC intros in the demoscene, but is entirely open source and is becoming an excellent free tool for any musician.	Instrument	N/A
BeatCrafter	Intelligent MIDI Drum Pattern Generator VST3 - Proof of Concept	Effect	JUCE
Bespoke	Node-based modular synth with live coding	Instrument	JUCE
BinAural VST	Mono-to-stereo plugin that positions sound in a 3D space using Head-Related Transfer Functions	Effect	JUCE
BiRR	BiRR (and her ambisonic sister AmbiRR) are room simulators that accurately emulate the sound produced by two monophonic and omnidirectionnal sources perceived by a listener in a rectangular (2D) or parallelepipedic (3D) room. The dimensions (x,y,z) of the room can be adjusted, as well as the source and listener positions. The generated stereo output can simulate different microphone positions (XY, MS, with different angles), or a binaural receiver.	Effect	JUCE
Biztortion	Modular distortion plugin for VST-based hosts made with C++ and JUCE framework.	Effect	JUCE
BlackBird	Analog-inspired software synth with its own voice	Instrument	JUCE
blocks	Polyphonic modular synth	Instrument	JUCE
BORIS Granular Station	A live-input granular plugin	Effect	JUCE
Breathalyzer	Breathalyzer is a VST3 instrument that turns MIDI notes into playable breath-and-voice gestures. It is not a sample player and not a speech synthesizer. The design goal is a compact expressive instrument whose mouth color, noise, growl, and vowel motion can all be performed from a small control surface.	Instrument	VSTGUI
C1Bitcrusher	Experimental and accurate bit reduction	Effect	N/A
Calf Studio Gear	Many LV2 and Jack audio plug-ins	Effect	GTK
Cardinal	Virtual modular synthesizer plugin	Instrument	DPF
CetoneSynthLight	CetoneSynthLight is a light-weight polyphonic synthesizer by Neotec Software. It aims to give you a light but professional synthesizer experience. Originally written by René Jeschke.	Instrument	DPF
Chorus Ex Machina	Physically modelled chorus synthesizer	Instrument	NIH-Plug
CHOW	Maximally truculent distortion effect	Effect	JUCE
Classic Reverb RE-02	Classic Reverb RE-02 is a reversed engineering of Kjaerhus Classic Reverb, a studio-quality free reverb plugin. It is a variant of Classic Reverb RE-04. They have the same controls, but RE-02 has a different timbre.	Effect	DPF
Classic Reverb RE-03	Classic Reverb RE-03 is a reversed engineering of Kjaerhus Classic Reverb, a studio-quality free reverb plugin. It is a variant of Classic Reverb RE-04, with a different flavor of sound style and controls	Effect	DPF
Classic Reverb RE-04	Classic Reverb RE-04 is a reversed engineering of Kjaerhus Classic Reverb, a studio-quality free reverb plugin. It sounds professional, with a flavor of vintage reverb, suitable for many applications from vocals to instruments.	Effect	DPF
Cloud Seed	Algorithmic reverb for emulating huge, endless spaces and modulated echoes	Effect	N/A
CloudReverb	This is an audio plugin for algorithmic reverb. The algorithm is borrowed from CloudSeed VST by Valdemar Erlingsson.	Effect	JUCE
CMBNEX	CMBNEX Is a 4 oscillator VST3 synth with a unique tuneable 2 dimensional waveshaper and 3 combiners that use several algorithms to combine incoming signals. All parameters have 4 slots for internal modulation from several modulation sources like envelopes, LFOs, and macros	Instrument	VSTGUI
Cocoa Delay	Warm and lively delay	Effect	WDL-OL
Comprez	Comprez is a simple but fast, versatile compressor plug-in. It's ready to give you a special compressor experience you may never have before. Although there are only 4 controllers currently, it does not limit your creation.	Effect	DPF
Convolver	Impulse-response reverb	Effect	JUCE, VSTGUI
CrushClone	A faithful recreation of the legendary CamelCrusher multi-effect plugin	Effect	JUCE
cStop	Tape stop	Effect	JUCE
Curvessor 2	Curvessor is an audio plug-in that implements a dynamic range processor in which the response curve of each channel is an automatable spline.	Effect	JUCE
DAFx19-Gamelanizer	Accompanying material for the paper 'A Real-Time Audio Effect Plug-In Inspired by the Processes of Traditional Indonesian Gamelan Music'	Effect	JUCE
Darvaza	Darvaza is a VST/AU plug-in which provides a gating effect. The gate can use different waveforms and its speed is individually controllable across channels. The gates oscillators are synchronized to the host tempo and time signature.	Effect	VSTGUI
DCOffsetter	DCOffsetter - DC Offset Audio Plugin allows you to adjust the direct current (DC) component of audio signals by adding DC offset (bias) to the audio signal. It provides independent bias control for left and right stereo channels, supporting various audio processing applications from fine adjustments to significant modifications.	Effect	JUCE
Delirion	A VST audio plugin that is a multi-band doppler shifter with band specific distortion and reverberation effects. The less scientific and more romantic definition is that it makes any incoming audio sound like remembered in a fever dream	Effect	JUCE
Dexed	DX7 FM plugin synth	Instrument	JUCE
Digits	Phase-distortion synth inspired by Casio CZ series	Instrument	VSTGUI
Disflux	Disflux is a free and open-source phase dispersion effect designed to add insane amounts of punch, depth, and character to your sound.	Effect	JUCE
Distrho glBars	OpenGL bars visualization plugin (as seen in XMMS and XBMC/Kodi) adapted from jack_glbars	Effect	DPF
Distrho Juice Plugins		Misc	DPF
Distrho Kars	Simple karplus-strong plucked string synth based on the karplong DSSI example synth	Instrument	DPF
Distrho Mini-Series	Collection of small plugins based on LOSER-Dev Plugins	Effect	DPF
Distrho MVerb	DPF-based version of MVerb	Effect	DPF
Distrho ndc Plugs	DPF-based versions of some of ndc Plugs	Effect	DPF
Distrho Nekobi	Simple single-oscillator synth based on Roland TB-303	Instrument	DPF
Distrho ProM	Music-visualizer plugin based on projectM	Effect	DPF
Dragonfly Reverb	Hall-style reverb based on Freeverb3 algorithms	Effect	DPF
Drops	Single file audio player	Instrument	DPF
Drummock	Drum sampler plugin with retro pitch shifting and hard clipper. Just drag and drop to load samples and start playing.	Instrument	JUCE
DtBlkFx	DtBlkFx is a Fast-Fourier-Transform (FFT) based VST plug-in	Effect	VSTGUI
Element	Advanced Audio Plugin Host	Misc	JUCE
Eurorack	Diverse set of physical modeling sources, organic processors, wavetable oscillators, waveshapers, granular synths, and utility modules	Misc	N/A
FILT-R	FILT-R is a cross-platform filter modulator based on plugins like ShaperBox and FilterShaper. It is the second version of FLTR-1 JSFX	Effect	JUCE
Fire	This is a multi-band distortion plugin 『Fire』.	Effect	JUCE
Flappy Chord	Flappy Chord is a simple prototype of musical game that reimagines the classic "Flappy Bird" formula as a fun tool for learning music. The bird is controlled by playing notes and chords on a connected MIDI keyboard.	Effect	JUCE
Flutterbird	Simple pitch fluctuation	Effect	iPlug2
FOGPAD	FogPad is a multichannel reverb effect with a little twist: instead of aiming to recreate a large amount of acoustic spaces, FogPad provides a murky nebula of frozen thoughts, recollecting long forgotten events. The reflections can be bent and transformed through use of its fully automatable parameters.	Effect	VSTGUI
FreeEQ8	FreeEQ8 is a professional-grade, free and open-source 8-band parametric EQ plugin for macOS, Linux, and Windows.	Effect	JUCE
Frequalizer	Frequalizer is a 6-band EQ with integrated analyzer	Effect	JUCE
GainPlugin	(Experimental) VST/AU audio plugin example based on JUCE with React-JUCE for UI.	Misc	JUCE, React-JUCE
Gammou	Gammou is a polyphonic modular sound synthesizer that be run as VST or standalone on Linux and Windows.	Instrument	N/A
GATE-12	GATE-12 is a cross-platform envelope generator for gate/volume control inspired by plugins like GrossBeat and ShaperBox. It is the second version of GATE-1 rebuilt from scratch using the JUCE framework.	Effect	JUCE
Gripverb	Gripverb is an implementation of a Schroeder reverb (4 all-pass filters into 8 comb filters) in JUCE.	Effect	JUCE
Gverb/Gigaverb	Reverb	Effect	VSTGUI
Hammer & Meißel	Hammer & Meißel is a keytracked polyphonic modal filter (and more).	Instrument	JUCE
Harpejji-VST	VST plugin is a virtual instrument that emulates the sound of an Harpejji, created as my Bachelor's thesis project using physical modeling synthesis techniques.	Instrument	JUCE
Helm	Polyphonic synth with lots of modulation	Instrument	JUCE
hexter	Yamaha DX7 modeling FM synth for DSSI	Instrument	DPF
HiLoFilter	Simple hipass/lopass filter controlled with a single knob	Effect	JUCE
Homecorrupter	Homecorrupter is a VST/AU plug-in which allows the reduction of sample rate, bit depth and playback speed of any incoming audio, on the fly.	Effect	VSTGUI
Hue	Mixes various noise types into the audio signal	Effect	Rust VST
HybridReverb2	HybridReverb2 is a convolution-based reverberation effect which combines the superior sound quality of a convolution reverb with the tuning capability of a feedback delay network.	Effect	JUCE
INTERSECT	INTERSECT is a sample slicer instrument plugin (VST3/AU/Standalone) with multi-sample sessions, per-slice locking, slice note ranges, multiple time/pitch algorithms, and MIDI-triggered slice playback.	Instrument	JUCE
IR: LV2 Convolution Reverb	NOTE : Please kindly recheck, i think this also use LV2 , which i think could be added to dropdown	Effect	GTK
jc303	A Free Roland TB-303 Plugin for Windows, MacOS and Linux: VST2, VST3, LV2 and AU. A JUCE port of Open303 engine	Instrument	JUCE
JS Inflator	JS Inflator is a copy of Sonox Inflator.	Effect	N/A
JS80P	JS80P is a MIDI driven, performance oriented, versatile, free and open source synthesizer VST® plugin for Linux, Windows, and macOS.	Instrument	N/A
JuceOPLVSTi	FM synth based on Yamaha OPL2/3 emulation from DOSBox	Instrument	JUCE
Juno 6	Roland Juno 6/60 Synthesizer	Instrument	N/A
Just a Sample	Just a Sample is a powerful, modern audio sampler, with a focus on simplicity and ease of use. Best of all, it's free and open-source! I spent a lot of time on this project, and I think it will be a great addition to your plugin collection.	Effect	JUCE
K-Meter	Implementation of a K-System meter according to Bob Katz’ specifications	Effect	JUCE
keithhearne/VSTPlugins	Collection of VST plugins	Effect	JUCE
Key Repeat	Beat repeat sampler	Instrument	JUCE
KickMaker	Synth specifically to create kick-drum sounds	Instrument	VSTGUI
LameVST	LameMP3 as an effect	Effect	N/A
LIRA•8	The Lira•8 is a digital attempt at emulating SOMA Lab's Lyra-8 signal flow and sound.	Instrument	JUCE
Luftikus	Luftikus is a digital adaptation of an analog EQ with fixed half-octave bands and additional high frequency boost. As an improvement to the hardware it allows deeper cuts and supports a keep-gain mode where overall gain changes are avoided.	Effect	JUCE
Magical8bitPlug 2	Old 8bit game console style synth	Instrument	JUCE
master_me	Automatic audio mastering plugin for live-streaming and internet radio stations.	Effect	DPF
mda	FX and virtual instruments for PC and Mac	Misc	N/A
mda-plugins-juce	JUCE implementations of the classic MDA audio plug-ins	Misc	JUCE
Microbiome	Microbiome is a real-time audio effects plugin that uses delay lines and looping to create vibrant audio artifacts mimicking the nature of evolutionary biology.	Effect	JUCE
MidiChords	Detect chord names from a MIDI track and display them in a scrolling window during track playback	Misc	JUCE
Mika Micro	Simple subtractive synth	Instrument	WDL-OL
Minaton-XT	Minaton - A monophonic, subtractive, beefy analogue style bass and lead synthesizer. Originally written by Nick Bailey (ThunderOx Software) (@thunderox)	Instrument	DPF
MixCompare	A professional audio plugin for DAW final stage mixing that provides instant switching between your work-in-progress mix and reference audio sources. Built with JUCE framework and modern web technologies.	Effect	JUCE
Modal Synthesiser	This is a software synthesiser that uses modal synthesis, a physical modelling technique using banks of resonators to filter an exciter signal, to create sounds with a parametrically controlled frequency spectrum. This synthesiser is designed to allow for the composition and performance of spectral music, and it produces sounds with timbres similar to those of natural materials such as wood, metal, and glass.	Instrument	JUCE
modEQ	EQ with modulation (VST3, AU)	Effect	JUCE
MultiMeter	A comprehensive set of AU/VST audio analysis tools (level meters, histograms, spectrogram analyzer, goniometer, correlation meter)	Effect	JUCE
Musializer Plugin	Spectrum visualizer plugin	Misc	JUCE
MVerb	Studio-quality reverb using the Dattorro’s figure-of-eight reverb structure	Effect	VSTGUI
ndc Plugs	VST plugins for Windows and OSX	Misc	VSTGUI
NEL	NEL is a vibrato plugin. It uses a feed-forward delay to modulate the signal in pitch and time. Various modulators can be used to create all kinds of vibrato textures.	Effect	JUCE
Neural Amp Modeler LV2	Neural amplifier modeler, LV2 version of Steven Atkinson's NAM plugin	Effect	N/A
Neural Resonator VST	This is a VST plugin that uses a neural network to generate filters based on arbitrary 2D shapes and materials. It is possible to use midi to trigger simple impulses to excite these filters. Additionally any audio signal can be used as input to the filters.	Effect	JUCE
Ninjas 2	Sample slicer, rewrite of Ninjas	Instrument	DPF
NotNotchFilter	Performance-oriented filter designed to replace the mid-EQ found in a standard 3-band DJ mixer	Effect	JUCE
OB-Xd	Based on the Oberheim OB-X	Instrument	JUCE
OctaSine	VST2 frequency modulation synthesizer written in Rust	Instrument	Rust VST
Odin2	Polyphonic Synth	Instrument	JUCE
Overdraw	Overdraw is an audio plug-in that implements a waveshaper in which the transfer function of each channel is an automatable spline.	Effect	JUCE
OwlBass	Additive bass synth	Instrument	JUCE
Oxe FM Synth	Multitimbral 8-operator FM synth (VST 2.4; Windows, Linux, macOS)	Instrument	VSTGUI
Panacea	NOTE : i think there should be new framework added, since this is using Cabbage , so for now i pick "No Framework" as option	Effect	N/A
PeakEater	PeakEater is a free, easy-to-use wave-shaping plugin. PeakEater lets you choose between different wave-shaping functions to clip everything above ceiling level. Therefore, you can boost the overall volume of your track safely without worrying that some nasty peak would go above the maximum allowed volume level of your DAW.	Effect	JUCE
PerceptoMap	PerceptoMap is an open-source audio plugin (VST3) that visualizes psychoacoustic features of audio signals in real time	Effect	JUCE
Phlegetron	An audio plugin that provides multiple distortion effects with simple parameter control. The distortion can operate on two independent channels, either split by a crossover frequency or by harmonic bins. Tweaking the controls should allow you to tune in to specific frequencies for creating either pleasing or disturbing harmonic distortion, depending on what takes your fancy.	Effect	JUCE
PitchedDelay	PitchedDelay is a delay that allows the pitching the delayed signal. This can be done within or outside the feedback loop.	Effect	JUCE
Plasma	Plasma is a free & open-source distortion powerhouse for VST3 hosts. Originally designed for Hardstyle, Gabber, Hardcore, and anything that needs raw, aggressive energy, Plasma lets you twist and destroy your sound with 12 brutal distortion styles and filters with extreme resonance capabilities.	Effect	JUCE
plugdata	Plugin wrapper around Pure Data, letting it be used as a plugin in your DAW	Misc	JUCE
PodcastPlugins	Podcast Plugins are easy-to-use plugins for speech enhancement, specifically designed for podcasters who can't or don't want to dig deeper into the craft of sound engineering.	Effect	DPF, Faust
Pulp Fiction	Multi-effects rack plugin	Effect	JUCE
PulseDelay	Timed delay effect	Effect	N/A
Pult-EQ	Pult EQ is a free and open source Pultec style tube EQ VST3 plugin (64bit) for Linux and Windows. Pult EQ is not made for fine detailed work, but for adding mojo and sound coloration. You can boost the lows, the highs and the mids. You can saturate your sound or, of course, do the “Pultec trick”. The EQ features stereo and mid/side processing and the saturation comes with automatic gain compensation and up to 16 times oversampling.	Effect	Faust
QDelay	QDelay (short for quick-delay) is a dual-delay with more features than it should for a free plugin that's supposed to be quick. While it offers nothing groundbreaking it is based on popular units like ReplikaXT and EchoBoy. The main goal is to create a free and open plug-in for my own productions, an alternative to the popular Deelay by SixthSample without premium versions or trimmed features or on-line activation.	Effect	JUCE
QtVST	VST plugins with a Qt interface	Effect	Qt
Ratatouille	Ratatouille is a Neural Model loader and mixer	Effect	N/A
RCSiner	RCSiner is an audio plugin that employs phase-distortion and waveshaping techniques utilizing the sine function. It provides a collection of selectable formulas, each equipped with three adjustable parameters and the capability to transform through multiple processing stages. This versatile tool offers and extensive range of sonic possibilities, from subtle harmonic saturation to full-on destruction of the audio signal.	Effect	iPlug2
RdPiano	RdPiano accurately emulates SA-synthesis digital pianos, such as the Roland MKS-20, RD1000 and the Rhodes MK-80 electric piano. It simulates the CPU-B board reused in different models, emulating the CPU and the custom chips. The emulation of the custom chips is derived from silicon analysis. It also approximates the BBD chorus and tremolo effect, albeit less accurately than the digital emulation.	Instrument	JUCE
RE201models	This repository is dedicated to digital modelling of the Roland RE-201.	Effect	JUCE
REACH	Extraterrestrial Reverb for Electronic Music	Effect	JUCE
Real-time Noise Suppression Plugin	A real-time noise suppression plugin for voice based on Xiph's RNNoise. More info about the base library.	Effect	JUCE
Rechoir	Rechoir is a delay plug-in in which the echoes are pitch shifted to create a tempo synchronized harmony from the input signal.	Effect	VSTGUI
REEV-R	REEV-R is a cross-platform convolution reverb with modulation for pre/send and post/volume signals.	Effect	JUCE
ReFine	ReFine is a plugin that allows to add a final polishing to your tracks, busses and masters. It extracts psycho-acoustic parameters from the source and thus allows to add warmth, space and punch to your mixes. This is done level dependent and rather subtle; you probably won't be able to create heavy distortion effects with this plugin.	Effect	JUCE
Regrader	Degenerative delay	Effect	VSTGUI
Resonarium	Resonarium is a MPE-compatible physical modeling synthesizer, based on coupled string waveguide models. It is designed to encourage abstract sound design, exploration, and open-ended play.	Instrument	JUCE
RetroPlug	A frontend for the SameBoy GameBoy emulator, with a focus on music creation	Instrument	iPlug2
Ripchord	Ripchord is a free MIDI plugin for creating and remixing chord progressions. You can create custom chord presets from scratch, load expansion packs, or import any MIDI file that contains chords and Ripchord will automatically create a preset from it	Misc	JUCE
RipplerX	RipplerX is a physically modeled synth, capable of sounds similar to AAS Chromaphone and Ableton Collision.	Instrument	JUCE
Room Reverb	Room Reverb is a mono/stereo to stereo algorithmic reverb audio plugin with many presets. It uses the implementation of Moorer's early reflection model and Jon Dattorro's Progenitor Reverb from the Freeverb3 signal processing library.	Effect	JUCE
Roth-AIR	Mixing tool for easily adding airy, crispy presence to audio	Effect	JUCE
Rotor	Rotor is a variable waveform ring modulation plugin targeting VST3 and AU for OS X and Windows platforms. It uses wavetable synthesis to generate various simple waveforms that act as the modulation signal for the input. It is compiled using the JUCE framework for C++.	Effect	JUCE
Schrammel OJD	Model of a modern classic guitar distortion pedal	Effect	JUCE
ScorchCrafter Guitar FX	Audio DSP FX and plugins, mostly for guitar (amp sim) and other FX	Effect	VSTGUI
Scream	Scream is a versatile VST plugin that recreates the legendary Scream filter from Massive. Known for its aggressive, resonant tone and raw energy.	Effect	N/A
Setekh	A minimalistic yet sonically powerful distortion plugin created and distributed via Full FX Media	Effect	JUCE
sfizz	SFZ parser library and instrument plugins	Instrument	VSTGUI
ShoutVST	VST for streaming sound into Icecast/Shoutcast directly from VST hosts	Effect	VSTGUI, FLUID
Sirial	Sirial is a Rhythmic Delay where each tap can be placed and configured with different amplitudes and feedback giving total control on how the delay responds and the patterns it creates.	Effect	JUCE
SmartGuitarAmp	Guitar amplifier-style plugin, that uses machine learning for emulating real world hardware	Instrument	JUCE
SmartGuitarPedal	Guitar pedal-style plugin, that uses machine learning for emulating real world hardware	Effect	JUCE
Sound Analyser	Real-time audio analysis to allow anyone to quickly set up and experiment with different algorithms	Effect	JUCE
Sound of Music	Multiband bitcrusher	Effect	JUCE
SPARTA	Spatial audio focused plug-in suite (Ambisonics encoders/decoders, 3-D panners/spatialisers, etc.)	Effect	SAF, JUCE
SpectralAbyss Multiband-Saturation	SpectralAbyss is a multiband saturation audio plugin built with JUCE. It allows the distortion of three individual frequency bands using two different distortion algorithms.	Effect	JUCE
Spice FX - Open Source Edition	A high-quality analog saturation VST3/AU/LV2 plugin with multiple distortion models. Open sourced in October 2025.	Effect	JUCE
Squeezer	Compressor with side-chain, several detection modes and filters, etc	Effect	JUCE
Stone Mistress	Phase Shifter and Chorus audio plugin, inspired by Electro-Harmonix Stereo Electric Mistress and Small Stone pedals	Effect	JUCE
SuperSpread	SuperSpread uses multiple pitch shifters to spread a signal thus allowing supersawing any input it is given.	Effect	JUCE
Surge	Subtractive wavetable synth	Instrument	VSTGUI
Synister	Subtractive synth	Instrument	JUCE
Syntage	VST 2.4 .Net Study Synth	Instrument	N/A
TeAr	TeAr is an advanced polyrhythmic and polyphonic MIDI arpeggiator plugin. It features four independent arpeggiator engines, each with its own pattern, subdivision, and MIDI output channel. This allows for the creation of complex, evolving musical phrases and textures.	Effect	JUCE
Temper	Digital distortion targeting VST, VST3, and AU for OS X and Windows	Effect	Faust, JUCE
Terrain	Terrain is a Wave Terrain Synthesis instrument. In wave terrain synthesis, a sound is produced via a 2D trajectory scanning over a 3D surface, or terrain. The timbre produced is dependent on the shape and parameters of the trajectory, as well as the shape of the scanned terrain.	Instrument	JUCE
The Analog Molecule	JSFX Based frame plugin for Reaper.	Effect	DPF
There will be blood	Drum bleed reduction plugin	Effect	JUCE
TIME-12	TIME-12 is a cross-platform is a delay modulator inspired by plugins like GrossBeat and ShaperBox. It can be used for a wide range of effects like stuttering, tape stop, glitch, scratch, reverse, pitch shift and more. It is the second version of TIME-1 rebuilt from scratch using the JUCE framework.	Effect	JUCE
traKmeter	Loudness meter for correctly setting up tracking and mixing levels	Effect	JUCE
Transfer	Transfer is a waveshaper based distortion, except the transfer function is JIT compiled from text inputted by the user. Starting as a tool for testing different transfer functions in other projects, it has evolved into a pretty cool and unique plugin (disclaimer it might not be that unique I have done absolutely no market research whatsoever). It also has a built in gate, and an emphasis filter, which applies the filters to the signal pre waveshaping, then applies the exact opposite filter post waveshaping. Due to popular demand (by popular I mean that one guy on reddit), it now also has has 16x oversampling and you can't turn it off sorry I don't make the rules.	Effect	JUCE
TRANSFORMANT	Transformant is a VST/AU plug-in which provides a stereo formant filter effect, driven by oscillators and obliterated to gravel through bit crushing or wave shaping.	Effect	JUCE
Tumult	Tumult makes noise. Tumult texturizes, accentuates and adds warmth and age. Tumult comes with 100 hand-picked noises. You can choose one of them or import your own samples and play them raw, let them follow your sounds or duck them away. Tumult comes with an 5-band EQ that lets you shape the noises to your liking. Tumult is a free and open source 64bit VST3 effect plugin for Linux and Windows.	Effect	JUCE
Tunefish	VST virtual analog synthesizer	Instrument	JUCE
Uhhyou Plugins	Uhhyou Plugins Collection	Effect	N/A
Ultramaster KR-106	A synthesizer plugin emulating the Roland Juno-6, Juno-60, and Juno-106	Instrument	JUCE
VAC-6V Volume Analyzer & Controller	NOTE : i put no framework, and i think could be added Jamba as new framework option in drop down	Effect	N/A
Valentine	Valentine is a compressor and distortion processor. It was inspired by the hyper compressed and crushed textures in the seminal Justice record, †. Using it is easy: turning input up makes the signal louder, more compressed, and more saturated. Turning crush up adds digital distortion.	Effect	JUCE
Vaporizer2	Hybrid wavetable additive / subtractive VST / AU / AAX synthesizer / sampler workstation plugin	Instrument	JUCE
VCV Rack	Virtual modular synth	Misc	RtAudio
VinSynth	VinSynth is a monophonic synthesizer with MIDI input, an interpolated delay effect, a lo-fi style bit crusher with a speed control that affects how fast the bit crushing happens, and a low/high pass filter	Instrument	JUCE
Vital	Spectral warping wavetable synthesizer	Instrument	JUCE
VST2413	FM synth based on emulator of YM2413 (OPLL) chip used in Sega Master System and FM-PAC MSX expansion	Instrument	N/A
VstProfiler	We are working on an open source JUCE vst3 plug-in that capture guitar amplifier and cabinet and emulate them in real time for guitarists.	Effect	JUCE
VSTSID	SID synthesizer instrument	Instrument	N/A
WarpCore	WarpCore is a multi-band spectrum inversion plugin, similar to the time-domain local spectrum inversion effect of PiWarp/Wormhole.	Effect	JUCE
Wavetable	A 2 oscillator wavetable synth with flexible modulation options	Instrument	JUCE
WebCZ101	Virtual CZ101 synth in a browser	Instrument	WAM
WebDX7	Virtual Yamaha DX7 synth in a browser	Instrument	WAM
Wolf Shaper	Waveshaper plugin with spline-based graph editor	Effect	DPF
WSTD DL3Y	Multiband delay plugin.	Effect	DPF
WSTD FLANGR	Simple stereo Flanger plugin.	Effect	DPF
YK Chorus	Chorus audio effect plugin based on DSP code by TAL	Effect	DPF
zam-plugins	LADSPA/LV2/VST/JACK audio plugins for high-quality processing	Effect	DPF
ZeroComp	A zero-latency feedforward compressor for broadcast, streaming, and live production, with four analog-flavored modes (VCA / Opto / FET / Vari-Mu).	Effect	JUCE
ZeroEQ	A zero-latency, spectrum-analyzer-integrated parametric equalizer for broadcast, streaming, live, and mastering work. 11 fixed-slot bands of minimum-phase IIR (2× HPF + Low Shelf + 6× Bell + High Shelf + LPF), with per-band drag, overlaid on a Pre / Post FFT analyzer	Effect	JUCE
ZeroLimit	A zero-latency brickwall limiter for broadcast, streaming, and music mastering	Effect	JUCE
zynaddsubfx	Additive/Subtractive AM/FM synthesizer with effects	Instrument	FLTK

Collections

• Awesome JUCE — list of JUCE libraries, plugins and utilities
• Hybrid Multimedia Production Suite — Collection of open software for a platform-independent advanced audio/video contents production suite
• Linux DAW — list of audio software and plugins, many of which are open-source
• Linux Synths — list of linux based synths, many of which are open-source
• Mach1 Spatial System — foundational plugins for spatial and multichannel audio mixing focused around vector panning
• Open Audio Stack — audio plugin management software, registry of StudioRack, OwlPlug, etc.
• OpenAV — collection of instruments, effects, and development tool kits for Linux.
• SFZ Instruments — list of SFZ instruments, most of which are free
• StudioRack — open-source audio plugin registry, app and command line tools
• VCV library — library of plugins compatible with VCV Plugin Manager

Audio Apps

Software	Source	Description
4Track	https://github.com/andreboekhorst//4-track-recorder	4track.cc is a web-based reimagining of a classic 4-track tape recorder, built with Svelte 5. Users can record, mix, and play back audio across four independent tracks, like the physical cassette recorders used by home musicians. Finished recordings ("cassettes") can be saved locally or shared with others via a link.
ADSR	satelllte/adsr	Simple web-based ADSR synth
Ardour	Ardour/ardour	DAW
ASIO2WASAPI	levmin/ASIO2WASAPI	Universal ASIO driver for Windows
Audacity	audacity/audacity	Audio editor
AudioKit Synth One	AudioKit/AudioKitSynthOne	Open-Source iOS Synthesizer App
Bosca Ceoil	TerryCavanagh/boscaceoil	Fun stand-alone beginner synthesiser
butterDAWg	Jaybee18/butterDAWg	DAW (WIP)
Carla	falkTX/Carla	GNU/Linux Plugin Host
ChucK	ccrma/chuck	Strongly-timed, Concurrent, and On-the-fly Music Programming Language
Coincident Spectra	bgins/coincident-spectra	A spectral-microtuning additive synthesizer
ComposeYogi	AppsYogi-com/ComposeYogi	The open-source Ableton-style music composer for the web
Drum Beat Repo	babali42/drumbeatrepo	An interactive library of drums patterns
Element	Kushview/Element	Advanced Audio Plugin Host
Elementary Grid	teetow/elementary_grid	A tonegrid synth made with Elementary Audio and React
EmuSC	skjelten/emusc	EmuSC is a software synthesizer that aims to emulate the Roland Sound Canvas SC-55 lineup to recreate the original sounds of these '90s era synthesizers. Emulation is done by extracting relevant information from the original control and PCM ROMs and reimplement the synth's behavior in modern C+
FFAB	disuye/FFAB	FFAB is a cross-platform, complex audio batch processor, drag & drop effects rack, command builder & graphical user interface for FFmpeg. Audio only, but with video passthrough. Easily create filter chains, save presets, run or export FFmpeg commands, multi-input/-output batching algorithms, divide jobs across parallel FFmpeg instances... with full logs to file. It does everything FFmpeg does, but in a less cryptic manner.
FlexASIO	dechamps/FlexASIO	Universal ASIO driver for Windows
Furnace	tildearrow/furnace	Tracker sequencer with a huge selection of game system chips
Giada	monocasual/giada	Loop machine
Guitarix	SourceForge → guitarix	GNU/Linux Virtual Amplifier
Harmonoid	harmonoid/harmonoid	Cross-platform music player (Mobile & Desktop) written in Flutter
Helio Workstation	helio-fm/helio-workstation	Sequencer
HISE	christophhart/HISE	Cross-platform framework/application for building sample-based virtual instruments (VST, AU, AAX)
Hydrogen	hydrogen-music/hydrogen	Drum machine
JSS-01	michaelkolesidis/javascript-software-synthesizer	JavaScript Software Synthesizer
LMMS	LMMS/lmms	DAW
Mididash	tiagolr/mididash	Mididash is an open source MIDI routing software with a node-based interface and Lua scripting. A modern take on programs like MIDI-OX.
Musescore	musescore/Musescore	A notation and sheet music app
Musical garden	ejarzo/musical-garden	A web instrument that allows you to make music by tending to a virtual garden
NewMixer	jatinchowdhury18/NewMixer	Mixing Software
OpenMPT	OpenMPT/openmpt	Popular tracker (formerly ModPlug Tracker) for Windows with support for IT, XM, S3M, MOD modules, VST plugins and ASIO
OpenUtau	stakira/OpenUtau	Singing synthesis platform for Windows, Mac and Linux that support UTAU voicebanks and machine learning voicebanks.
OpenX32	OpenMixerProject/OpenX32	Linux and Custom Firmware for the Behringer X32 Audio-Mixing-Console.
orDrumbox	SourceForge → ordrumbox	Drum machine
ossia score	ossia/score	Cross-platform intermedia sequencer
OwlPlug	DropSnorz/OwlPlug	Audio plugin manager
Patchcab	spectrome/patchcab	Modular Eurorack style synthesizer made with Web Audio
Psycle	SourceForge → psycle	Modular music tracker
SampleScanner	psobot/SampleScanner	Tool for auto-sampling hardware instruments
SFZ to HISE converter	anderseklov/SFZ-to-HISE-converter	JavaScript app that translates SFZ instrument files into HISE samplemaps and JSON data objects. Runs in a modern web browser. MIT license.
Shape Your Music	ejarzo/Shape-Your-Music	A web application for drawing music
Sonic Pi	sonic-pi-net/sonic-pi	Code-based music creation and performance tool
Soundshed	soundshed/soundshed-app	Browse and manage favourite tones, control your smart amp/fx (Spark Amp etc), jam to video backing tracks, learn chords and scales.
SpectMorph	swesterfeld/spectmorph	SpectMorph is a free software project which allows to analyze samples of musical instruments, and to combine them (morphing). It can be used to construct hybrid sounds, for instance a sound between a trumpet and a flute; or smooth transitions, for instance a sound that starts as a trumpet and then gradually changes to a flute
Stargate DAW	stargatedaw/stargate	Cross-platform, all-in-one DAW and plugin suite
StudioRack	studiorack/studiorack-app	Audio plugin manager
SuperCollider	supercollider/supercollider	SuperCollider is a platform for audio synthesis and algorithmic composition, used by musicians, artists, and researchers working with sound.
VCV Rack	VCVRack/Rack	Modular synth
VocalShaper	Do-sth-sharp/VocalShaper	A JUCE-based Open Source DAW. This DAW is lightweight and can meet most daily usage needs.
yabridge	robbert-vdh/yabridge	Linux bridge for Windows VSTs
Zrythm	zrythm/zrythm	DAW

Software Development Libraries & APIs

Library	Source	Description
AudioKit	AudioKit/AudioKit	Swift audio synthesis, processing, & analysis platform for iOS, macOS and tvOS
AudioPlugSharp	mikeoliphant/AudioPlugSharp	Easily create VST (VST3) audio plugins in C# .NET
Avendish	celtera/avendish	C++20 framework for any sort of audio / video / midi media objects
Cabbage	rorywalsh/cabbage	Framework for developing audio plugins and standalone instruments with Csound
Clap	free-audio/clap	CLAP stands for CLever Audio Plugin. It is an audio plugin ABI which defines a standard for Digital Audio Workstations and audio plugins (synthesizers, audio effects, ...) to work together.
Cmajor	SoundStacks/cmajor	Cmajor is a programming language for writing fast, portable audio software.
Csound	csound/csound	Programming language for sound and music synthesis
DawDreamer	DBraun/DawDreamer	Audio-processing Python framework supporting core DAW features written with JUCE
DawVert	SatyrDiamond/DawVert	DAW Project File Converter written in Python
DPF	DISTRHO/DPF	C++ framework for creating cross-platform audio plugins. DPF can build for LADSPA, DSSI, LV2, and VST formats.
Dplug	AuburnSounds/Dplug	Dplug lets you create audio plug-ins with unmatched simplicity and speed, using the D language.
Elementary	elemaudio/elementary	JavaScript runtime for writing native audio applications, as well as a library and framework for composing audio signal processes.
Faust	grame-cncm/faust	Functional programming language for real-time signal processing
FluidSynth	FluidSynth/fluidsynth	Real-time synth based on the SoundFont 2 specifications
Heavy	Wasted-Audio/hvcc	The heavy hvcc compiler for Pure Data patches. With generators for Bela, Fabric, js, pdext, Unity, Daisy, DPF, and Wwise frameworks.
iPlug 2	iPlug2/iPlug2	Simple-to-use C++ framework for developing cross-platform audio plugins/apps
JUCE	juce-framework/JUCE	Cross-platform C++ framework for developing desktop and mobile apps and audio plugins
jVSTwRapper	SourceForge → jvstwrapper	Wrapper to write audio plugins in Java (VST 2.4, AU, LADSPA; Windows, Linux, macOS)
libopenmpt	OpenMPT/openmpt	Cross-platform C/C++ module-playback library based on OpenMPT
libspatialaudio	videolabs/libspatialaudio	Cross-platform C++ library for Ambisonic encoding and decoding, filtering and binaural rendering
Nallely	dr-schlange/nallely-midi	Python library meta-synth oriented for scripting your MIDI devices, create virtual modules (LFOs, Envelope Generator, graphical visuals, ...), map all of them together dynamically. Also provides a websocket-bus to create visuals/modules with other languages and a websocket-based protocol to control the core library at run time.
NIH-plug	robbert-vdh/nih-plug	Rust VST3 and CLAP plugin framework and plugins
PortAudio	Assembla → portaudio	Cross-platform audio I/O library
Qubx	PasqualeMainolfi/Qubx	Rust library for queue-based multithreaded real-time parallel audio streams processing and management
r-audio	bbc/r-audio	A library of React components for building Web Audio graphs.
RtAudio	thestk/rtaudio	C++ classes for cross-platform real-time audio I/O
rust-vst	rust-dsp/rust-vst	VST 2.4 API implementation in the Rust language
RustAudio	rustaudio/	Collection of audio processing and plugin libraries for the Rust language
SAF	leomccormack/Spatial_Audio_Framework	Cross-platform framework for developing spatial audio related algorithms and software in C/C++
SOUL	soul-lang/SOUL	SOUL (SOUnd Language) is an attempt to modernise and optimise the way high-performance, low-latency audio code is written and executed.
Soundpipe	PaulBatchelor/Soundpipe	Lightweight music DSP library written in C; over 100 modules, many ported from Csound
Tone.js	Tonejs/Tone.js	A Web Audio framework for making interactive music in the browser.
tracktion_engine	Tracktion/tracktion_engine	Tracktion Engine module. You can build anything from a simple file-player or sequencer to a full blown DAW.
VSTGUI	steinbergmedia/vstgui	User-interface toolkit mainly for audio plugins
WDL-OL	olilarkin/wdl-ol	Simple-to-use C++ framework for developing cross-platform audio plugins (superseded by iPlug 2)
Web Audio API	WebAudio/web-audio-api	The Web Audio API provides a powerful and versatile system for controlling audio on the Web, allowing developers to choose audio sources, add effects to audio, create audio visualizations, apply spatial effects (such as panning) and much more.
WebAudioModules	webaudiomodules/	WAM (WebAudioModules) — synthesizers and audio effects processors for web browsers
WEBMIDI.js	djipco/webmidi	WEBMIDI.js makes it easy to interact with MIDI instruments directly from a web browser or from Node.js

Code Samples

• FFTConvolver — audio convolution algorithm in C++ for real-time audio processing
• KlangFalter — convolution audio plugin (e.g. for usage as convolution reverb)
• py-modular — modular and experimental programming environment with basic DSP routines in Python

Open Data Resources

• MoisesDB — Source separation public dataset by Moises
• OpenAIR — the Open Acoustic Impulse Response Library (Convolution Reverb Impulse Responses to recreate reverb character of space and equipment/recordings)