Question I'd like to know if the Ditto X2 looper has mono summing capability Can I have a stereo input but only use a mono output Vice versa, can I use a mono input but get stereo output Will there be any adverse effects Answer Unfortunately not as there is no mono summing. It is possible to have mono IN / Stereo out, but not Stereo (or dual mono IN) and Mono out - it will be stereo out or dual mono out.