> Maybe in old style etiquette, leaving some headroom is a gesture to > show you didn't limit > or clip your file against 0 db. Of course nowadays you could > brickwall limit your mix to > -3db, but in theory you're not sending a brickwall-limited mix to a > mastering engineer. > Right? Right fellas?! Not only in theory; mastering engineers want the supplied material to be as little compressed/limited as possible. The more you compress/ limit it, the less the mastering engineer can do for you. So the only headroom required is the headroom you need yourself to get a mix that isn't either squashed or clipped. Maurits.