MILL: the Mobile Instrument Library and Launcher

We introduce MILL, the Mobile Instrument Library and Launcher. A browser-based musical performance platform that transforms participant smartphones into networked musical instruments, MILL provides composers and per- formers with a library of custom mobile instruments crafted using the Web Audio API, Cycling ’74’s RNBO, and com- mon web interface elements with unique control schemes. A tool for designing participatory performances that harnesses the ubiquity of mobile devices, MILL dissolves the boundary between performers and audience: anyone with a browser can register, receive curated instrument patches, and follow dynamic scores pushed directly to their screens. Composers and ensemble directors gain fine-grained control over ensem- ble texture and form, cueing instrument changes or score updates in real-time, while participants interact through in- tuitive gestural interfaces. By uniting multi-user synchro- nization, preset management, and dynamic score presenta- tion in a platform-agnostic web environment, MILL expands possibilities for both tightly scored works and spontaneous, audience-driven performance.