It is such a rush reading about your applications of DMXIS using Cantabile 3.
I set up my first computerized light shows using an interface I built for a Commodore 64, writing a program in BASIC that poked machine language into the registers which turned on and off the eight +5v outputs that an external user port offered. That was in 1992. There were better computerized or at least automated implementations (I worked on wiring one used for a giant illuminated map for Intermedia Systems in Boston back in the seventies!) but that Commodore interface was the first one I ever built and used.
Seeing how far it has come is a blast! 512 channels from the basic unit - cool cool cool!!! 
Terry