Thanks DAN01.
I'll wait then until AJ's computer is OK...
I already did what you said... but even with the vocalizer set to off (with the led off) it starts to "work" in the middle of some songs I play...
I want to have the "vocal to arrange" function activated but only when I press the vocalize button (and then led sets on)... but the vocalizer started to worked with the vocalizer off and also the led off, and that's what i'm not undestanding...

Thanks