Using studiolive 24.4...what input do i use for vocal monitoring? Shld be pretty simple..but i dnt get it. At one point i plugged it in, and i cld hear the playback from what was recorded. but i cldnt hear the mic at the same time., or at all through the headphones even when not playing something back. .can someone help. And explain what input to use, and maybe exactly what on the studio live has to be engaged in order to hear in the headphones whats coming from the mic...