webrthomson and JKD,
Thanks for your insight. I checked out the link. My midi knowledge might be below all that at the moment. I have the GCP connected to the GCX (also from Voodoo). I already have instant access to pedals via the GCP. But if I have pedals on and try to change channels on the RM4, all the pedals that were on are not anymore. I guess I am trying to have instant access to amps and pedals.
Even if this is what I need to do:
Control Change #56 (w/Control Value 127) allows for ?Instant Access? selection of Channel 1.
Control Change #57 (w/Control Value 127) allows for ?Instant Access? selection of Channel 2.
Control Change #58 (w/Control Value 127) allows for ?Instant Access? selection of Channel 3.
Control Change #59 (w/Control Value 127) allows for ?Instant Access? selection of Channel 4.
I still would not know how to do that with the GCP. Thanks again for your expertise.