Everyone has their favorite cartoon characters but not many people know the personalities behind them…until now. Below is the 4 minute trailer for the upcoming documentary I Know That Voice which gives us a look into the confines of the TV/film recording booths. From Batman: The Animated Series’ Kevin Conroy to Futurama’s Billy West and John DiMaggio, we’ll get to hear from the real people who give life to the 2 dimensional characters we’ve grown to love… I Know That Name is directed by Lawrence Shapiro and explores the history of voice acting. Along the way it looks like we’ll even hear from icnoic voice actors like June Foray (the voice of Rocky from “Rocky…