RC Surface

A Max4Live device for Ableton Live, open-source MIT. Turns any phone browser into a wireless MIDI + multi-sensor controller: 12 performance pads, two physics XY pads, knobs & faders, sensor mappings (motion, orientation, audio, vision), in-browser mapping editor. No phone install required.

Built on the Ableton Extensions SDK. The mobile side runs as a web app on the phone’s browser; the desktop side runs as a Max4Live device inside Live. Both talk over WebSocket, and the mapping editor lives in the browser too — so you can build or change a layout from the phone while Live is on stage.