USB out of controller into computer > reason, redirect to midi out of computer (with midi clock), to midi in on controller (unless you dont need to feed clock to the controller then go directly to zaquencer), midi thru on controller to midi in on zaquencer, midi out 1 of zaquencer to midi in on bass station, midi out 2 of zaquencer to midi in on computer. make sure midi merge on zaquencer is set to ‘off’.
reason is master here btw. output midi cc messages from reason to control pattern playback on zaquencer and transposition etc