heres how i do it... i take from 2 - 4 recording devices + mics... one will be off the board and the others will be mics around wherever i want. It will all be recorded seperately, then when i get home, i get all the sources into my computer and use cubase/protools/DP or whatever to mix them all together correctly, EQing each mix as i go to be able to come out with the best final mix.