TonalFlex is an open-source platform for running professional audio plugins on embedded hardware — portable, flexible, and fully remote-controllable.
Powered by Elk Audio OS, TonalFlex transforms devices like the Raspberry Pi 4 into low-latency, headless DSP units capable of running multi-channel chains of VST3 plugins.
TonalFlex is a complete bundle of applications and plugins that transform your embedded hardware into a fully featured Pro Audio System.
Remote control everything wirelessly from your phone, tablet, or computer - or via MIDI over Bluetooth or USB.
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🎛 One Plugin Codebase
Write your audio plugins using JUCE and run them anywhere — cross-compile for embedded Linux, or build desktop formats like VST3, AU, AAX, and LV2 for macOS, Windows, and Linux. -
📱 Unified UI
Design your plugin interfaces using modern web tools (e.g. TypeScript, Vue, Vite). UIs run directly in desktop builds via JUCE WebView, and can also be packaged asnpmmicro frontends for use in the browser-based TonalFlex remote control UI — the same GUI code runs everywhere! -
🕹️ Remote Control
Control your rig over Wi-Fi or Bluetooth — no screen required. MIDI controlling is supported over USB and Bluetooth. -
🛠 Fully Open Source
Fork it. Hack it. Extend it. TonalFlex is built to be modified.
Follow the official Elk Audio OS instructions.
Follow the Tonalflex Bundle instructions.
Tonalflex provide a custom JUCE template for writing your own compatible plugins — see the tonalflex-template-plugin.
Once you have written your plugin, you will need to fork and add your plugins to the following repositores:
After that, you can pull your personal fork of the tonalflex-bundle to your embedded device running ElkOS in order to use your own plugins.
