MSDP is a robust, free and open-source platform for Multimedia Synthesis, Design, and Performance. Built around the paradigm of expandable guitar pedal boards, the 100+ modules included in the program provide all of the tooling required to design, script, and execute complex and exciting performances of audio, video, and multimedia art. MSDP is not a Max package; it is an application that offers a complete creation and performance platform, built in Max 8. The software leverages tooling from the latest updates to the language, popular Max community packages, externals, and abstractions, and custom-built NodeJS scripts, to provide a robust creation environment. Each of the 64 audio, 24 video, and 17 data modules can talk to each other from any location in your project. The free source-code download on Github includes a variety of templates and abstractions that streamline the module building process. Developers can distribute sell custom MSDP modules.