Since the synth is basically a 1-voice Prophet 6, I bet ALL of the code was done by DSI... they have the code for it, they have the knowledge of it, it would only be more complicated, if some of the Pioneer people would be involved in it (I bet DSI remember the problems working with others on the Tempest regarding user samples)... If I am right, Pioneer probably designed the housing, since this is way different than what DSI normally does, but all the rest I'm fairly certain is done by DSI.... For some reason, there must be some benefit on the sales and manufacturing by Pioneer because I really see this synth as a DSI synth, in Pioneer's clothing... nothing else.