Video production question
 

How do you synch all the audio if you're using multiple cameras? Take a convert video for example, if you're filming a concert using 10 different cameras, and during one song you have a total of 6 different angles, how do you keep track of where the audio goes in relation to what everyone is playing?

Seperate audio recording station.

Yeah, I imagine for concerts they take it right off the soundboard, but I was wondering how they synch everything up in the end?