I was just thinking about using one with a "dumb" controller. The Edirol has plenty of buttons, knobs, slider, etc., to call up any sound you want from the Roland. I suppose a synth or another arranger would add the sounds from it too, but wouldn't it be hard to use sounds from both or either and not have them get in each other's way? How would you set that up?
I tried controlling a Midjay from different arrangers, but never could figure out an easy way to use, say, piano from the controller, then guitar from the module without hearing both. Of course I didn't try very hard, so maybe I'm just ignorant of the techology. I guess you could use a volume pedal on each, but I'm already going to be using a 7-button foot controller, and a sustain pedal. I'm running out of feet.
DonM