I am working with a friend who is producing a *low budget* movie. As someone who has some audio experience he is relying on me to produce his movie score and also be his audio engineer for filming. Unfortunately, I have no idea what makes a good mic for filming. I do know that my SM57 does not get it done. We have a shotgun mic (brand and model escape me at the moment) and are looking for a second one (field recorder will record 2 channels). Any advice? Thanks in advance.