The Roland G1000 can achieve the results of a merger. It has 2 sets of midi in, out, and thru[A and B]The settings can be changed to transmit and receive, interchangable from A to B and vice versa. For example You can play a JV2080 from the G1000 upper 1 realtime part connected from midi A out, andhave a bass pedal controller connected to the midi B in, assigned to a selected midi channel of the A midi out...Fran