Strudel Jelly

Strudel live coding on your desktop, offline, with real VST3 and VST2 plugins.

Features

• Hot reload. The music updates as you type, and code that doesn't parse yet is skipped.
• Plugins in code. Play VST3 and VST2 synths with .s(), chain effects with .fx() and move knobs with .set().
• Old 32-bit plugins too. 32-bit VST2 plugins run in their own bridge process, with their windows embedded as usual.
• Mixer. Reorder, bypass and add plugins in a pane that edits your code.
• Piano roll. Notes coloured by block. Click one to jump to the code that made it.
• Built-in docs. Every Strudel function with playable examples, on hover or F1.
• Fully offline. Every sound you load is cached, and you can save all built-in sounds at once.
• Plain files. Each sketch is a .js file and each folder of samples is a sound, all under Documents\Strudel Jelly.
• Crash-safe audio. Plugins run in a separate engine process, so a crashing plugin can't take the app down.

Plugins are found in the standard VST3 and VST2 folders, plus any you add in Settings → Plugins. A plugin installed as both VST3 and VST2 is loaded as VST3.

Keys

Ctrl+Enter / Ctrl+.	Play / stop
Ctrl+K	Search functions, sounds, sketches and commands
Ctrl+N / Ctrl+S	New sketch / save
F1	Docs for the function under the cursor

Vim keys are in Settings.

Build

Windows only. Needs Node.js, Visual Studio Build Tools (C++ workload), LLVM (clang-cl), CMake and Ninja.

npm install
npm run host:build   # the C++ audio engine (JUCE) and the 32-bit plugin bridge
npm run dev          # run the app
npm run dist         # package to release/win-unpacked/

host:build runs two CMake builds: the 64-bit jelly-host.exe and the 32-bit jelly-bridge32.exe, both copied to host/bin/. The first build downloads JUCE and FST (the VST2 headers), so it needs internet once.

License

AGPL-3.0-or-later, like Strudel. The audio engine uses JUCE under the AGPL and FST (GPL-3.0-or-later) for VST2 support.

VST is a registered trademark of Steinberg Media Technologies GmbH.