Formula by Soundspear

Formula is a free and open-source integrated development environment to create, debug and test your own audio effects the simplest way possible.

Formula can either be used as an effect plugin inside your DAW (VST3 or AU), or as a standalone application. The effects within Formula are made using the C programming language.

Browse and use innovative effects made by the community from Formula with a Formula Cloud subscription.

Formula by Soundspear is a Virtual Effect Audio Plugin and a Standalone Application for macOS and Windows. It functions as a VST Plugin, an Audio Units Plugin, a VST3 Plugin and a Standalone Application.

https://soundspear.com/product/formula