I don’t know the procedure for CME specifically so I’d have to look it up to confirm, but the wireless midi (bluetooth) jack I own requires both the input and output of the transmitting device to (both) be plugged in to the synth/controller that will be sending signal to the receiving device, meaning if keystep were sending signal the dongle would need to be plugged into both the midi in and the midi out, or if it was digitone the same would be true. To get around this or add an additional device also going in requires some combination of a merger box and a thru box if I want anything else in line with it. So is the CME widi jack different? Does it only occupy one DIN slot or the other?