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 OP-Z, does it sample? OP-Z, what external equipment is required to use DMX? can i register my unit on your website? OP-Z, can i import my OP-1 synth patches or only sample patches? OP-Z, how to export projects?