Hi all. I just had a sampler mpc element,and I connect my pc,it work with a software,on the inst.ext. from xw-p1.But the sound ,I just saw it after,is not in stereo.I have two question: -what does control the ints,ext (I talk about the trigger number 5 of the guide) -what should I do for have a stereo sampler AND stereo xw-p1 I'd like to record ,both in the same time on a recorder BOSS BR900CD,in stereo. What do I need for this? Do I need to buy something else ? Thank you very much.