How do I remotely change the arpegiator for a given instrument?

[Jesse Johannesen]

I see what you mean. I will discuss this with Steve as I agree it bears consideration. In the mean time you could work around by merging 2 ins (keyboard on DIN Port 1 and CC controller for arp control on Port 2, for instance), to a DIN out (lets say Port 2) then take port 2 out and put it back in DIN input Port 3, and use that combined MIDI data for your Arp.

I think that would solve this issue, if being just a little cumbersome. Let me know if I have anything turned around in my understanding though, and let me know if it works.