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Open-source projects

Open source projects in this category include freely available music software and plugins with disclosed source code. Examples are DAWs, synthesizers, effect plug-ins, and utility tools developed and maintained by the community. The offerings target ambitious musicians, developers, and tech-savvy users who value transparency, customizability, and free use. This category differs from proprietary or commercial software in the directory.

Delivery
Platform
Plug-in format

80 entries

Open source

Free, open-source visual programming environment for audio patching compatible with Pure Data for education and artistic use

Audio Unit CLAP LV2 VST3 Desktop App Mobile App Plugin Standalone
Free

Real-time, non-destructive MIDI quantizer for adjusting groove and timing in MIDI performances across Windows, macOS, and Linux

Audio Unit VST3 Plugin
Catalog
Open source

Ableton Live MCP server β€” MCP server for controlling Ableton Live via AI assistants by voice command.

Desktop App Mobile App Plugin

Advanced audio panning plugin for Windows, macOS, and Linux offering multiple modes including binaural and M/S processing to enhance stereo mixing

AAX Audio Unit CLAP LV2 VST2 VST3 Plugin
Free

Free dual-delay audio plugin with extensive modulation, saturation, pitch shift, and tape effects features without restrictions

Audio Unit LV2 VST3 Plugin
Open source

Python application to control REAPER DAW via Model Context Protocol enabling automation of tracks, effects, MIDI, and project management

Command line Library / API
Paid

Soprano recorder instrument plugin with tuning, envelope, polyphony, and reverb for Windows and macOS hosts

Audio Unit VST2 VST3 Plugin Standalone

Versatile multi-mode gating audio plugin for Windows, macOS, and Linux with 4x oversampling and wide host and format support

AAX Audio Unit CLAP LV2 VST2 VST3 Plugin
Paid

A MIDI-controlled audio harmonizer plugin that shifts pitch intervals and note volumes in real time on Windows, macOS, and Linux

Audio Unit VST3 Plugin Standalone
Free

A unique highpass filter plugin that creates retro-style bass reduction by combining harmonic generation with highpass filtering

Audio Unit CLAP LV2 VST2 VST3 Plugin Standalone

High-quality algorithmic reverb plug-in for realistic small room ambience and creative shimmer effects on Windows, macOS, and Linux

AAX Audio Unit CLAP LV2 VST Plugin

Open-source sample-based instrument in active beta development by Surge Synth Team with community feedback and ongoing improvements

Plugin Standalone

Spectral effects plugin available as CLAP, VST3, AUv2 and standalone for macOS, Windows, Linux in pre-release state

Audio Unit CLAP VST3 Plugin Standalone

A GitHub repository listing many open source audio software projects including plugins, apps, and libraries for sound synthesis and effects

Plugin Standalone
Free

A smart imaging robot for automating high-resolution timelapse photography of biological samples on Petri dishes

Library / API Plugin Standalone
Open source

Flexible general-purpose audio compressor with stepped and continuous controls for versatile compression

VST2 VST3 Plugin
Free

All-in-one digital audio workstation with integrated instruments and effects focused on efficient EDM music production

Desktop App Standalone
Open source

Open-source digital subtractive hybrid synthesizer with versatile oscillators, filters, modulation, and effects for multiple platforms

Audio Unit CLAP LV2 VST VST3 Desktop App Plugin Standalone
Open source

Cross-platform open-source multi-track audio editor and recorder with plugin and scripting support

Audio Unit LV2 VST Desktop App Plugin
Open source

Four-oscillator wavetable synth plugin with FM, ring modulation, unison, filters, and a drag-and-drop modulation system for macOS, Windows, and Linux

Audio Unit LV2 VST3 Library / API Plugin
Free

Hybrid wavetable additive/subtractive synthesizer and sampler plugin with versatile high-performance wavetable engine and editor for rich sound design

AAX Audio Unit CLAP LV2 VST2 VST3 Plugin Standalone

A Windows VST distortion plugin offering classic one-knob control with both free cosmetic and PRO feature-rich versions for music production

VST VST2 Plugin
Open source

Spectral warping wavetable synthesizer offering visual sound design and advanced modulation for creative sound shaping

AAX Audio Unit LV2 VST2 VST3 Desktop App Plugin Standalone

An open source lightweight JUCE-based DAW supporting various plugin formats and audio/MIDI capabilities for daily music production needs

ARA Audio Unit LV2 VST VST3 Desktop App Plugin
Free

Native NodeJS addon to instantiate and run VST3 audio plugins with GUI in separate processes, currently experimental and macOS-centric

VST3 Library / API Plugin
Free

Rust library for creating VST 2.4 plugins or hosts, deprecated due to VST 2 discontinuation

VST VST2 Library / API
Free

2 oscillator wavetable synthesizer with flexible modulation options and effects for diverse sound design

Audio Unit LV2 VST2 VST3 Plugin Standalone
Paid

Simple and open-source delay effect plugin with adjustable delay time, DAW sync, and stereo cross control for Windows, macOS, and Linux

CLAP LV2 VST VST2 VST3 Plugin
Paid

Three-band EQ plugin adding resonant character and crunch with an adjustable mid band, for Windows, macOS, and Linux

CLAP LV2 VST2 VST3 Plugin

A distortion audio plugin with three reorderable stages for diverse sound mangling, available for Windows, macOS, and Linux

Audio Unit CLAP LV2 VST2 VST3 Plugin
Free

Stand-alone one-knob buss compressor with integrated EQ and output clipping based on ConsoleX2's buss processing, simplified for ease of use

Audio Unit VST2 Plugin Standalone
Open source

A tool to run Windows VST2, VST3, and CLAP plugins on Linux DAWs via Wine integration

Audio Unit CLAP VST2 VST3 Desktop App Plugin Standalone