This is of course about the simplest way to get good audio. One microphone plugged into the XLR port on our XD cam Sony rigs. It takes some getting used to however if you are not experienced moving the microphone back and forth between your own mouth and the person being interviewed. The tendency is to keep the mic on the subject since they are doing most of the talking. So we do come accross video "stand ups" where the beginning of the question is really low until they realize they have to speak into the mic.