The best open source alternative to GarageBand is LMMS. If that doesn't suit you, our users have ranked more than 100 alternatives to GarageBand and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to GarageBand are Ardour, ComposeYogi, Bespoke Synth and Carla.
Cross-platform digital audio workstation supporting lossless audio and VST plugins. Features include music looping, sequencing, and MIDI support. Provides an ad-free, privacy-focused, portable experience without registration, working offline with extensibility through plugins and add-ons.
Ardour is a hard disk recorder and digital audio workstation application. Record, edit, and mix on Linux, Mac OS X, and Windows.
A free, open-source music composition tool for beat-making, loops, and arrangements — built with Web Audio, WASM, and modern web tech.
Bespoke is a software modular synthesizer. It contains a bunch of modules, which you can connect together to create sounds.
Carla is an audio plugin host, with support for many audio drivers and plugin formats. It has some nice features like automation of parameters via MIDI CC (and send output back as MIDI too) and full OSC control.
Zrythm is a digital audio workstation designed to be featureful and easy to use.
Qtractor is an Audio/MIDI multi-track sequencer application written in C++ with the Qt framework. Target platform is GNU/Linux, where the Jack Audio Connection Kit (JACK) for audio, and the Advanced Linux Sound Architecture (ALSA) for MIDI, are the main infrastructures for...
FamiStudio is very simple music editor for the Nintendo Entertainment System or Famicom. It is designed to be easier to use than FamiTracker, but its feature set is also much more limited.
A lightweight, cross-platform DAW built in Rust with egui, designed for sound design and audio prototyping.
Wavacity is derived from the open source Audacity and modified to run in the web browser.
Stargate is a holistic audio production solution, with everything you need to make music on a computer.
AudioMass lets you record, or use your existing audio tracks, and modify them by trimming, cutting, pasting or applying a plethora of effects, from compression and paragraphic equalizers to reverb, delay and distortion fx.
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More of a learning curve but a great program if you can take the time to learn it.