OP-Z, sample and mic input the OP-Z will only support mic input for headset. the headset button is not mandatory, the microphone source can be activated with SCREEN+SHIFT as well. Related articles does the OP-Z sample? yes-s-s-s can i register my unit on your website? what external equipment is required to use DMX? how do i hook up my OP-Z to a monitor? can i import my OP-1 synth patches on the OP-Z or only sample patches?