Arduino + Ableton + Resolume from Juanma Sarrió on Vimeo.
"Connection Test Resolume + Ableton + Arduino.
Ableton sends MIDI messages to Resolume to sequence some video loops, as well as to synchronize BPM scale of another video.
Meanwhile, Arduino (with help from Midi Yoke and S2Midi and one LDR) sent other MIDI messages through another channel to control the volume of a track in Ableton and the speed and opacity of two loops in Resolume."