I haven't done a write-up yet, but my partner and I use MIDI as part of our custom lighting setup, which we bring to gigs and other events. A MIDI controller is hooked up to a raspberry pi running some Python software. We use the `mido` library for decoding MIDI. We then drive a bunch of RGB LED strips using DMX. Video: https://www.instagram.com/p/BtjLSUeFjtJ/.
The main reasons I’ve seen VJ’s use MIDI is that they can slave their rig to the performer’s Ableton Live setup. I’ve got friends that have set up timing triggers to pyro and displays / lighting (interfacing with the VJ’s rig) within a few hours of stepping off a plane for a gig that night.
