It's possible I'm hearing things... but I've been NOT checking the FADE IN box and it still sounds like it's fading in.
I imagine some fade in is necessary to make it easier to start at 0 volume and not have clicks/pops etc so that the editor is easy to use... but if there's a default forced fade in, maybe it could be shorter in duration?
Not sure if i'm explaining that right, or if I'm just hearing things... (or if I'm just being picky, lol)