if a person has the gifts necessary to be able to grow into the role and contribute effectively.
i am not suggesting that someone needs to be an expert before joining the sound crew, they certainly do not. but i would suggest that someone who can easily hear if something is in-tune or out-of-tune might be a good place to start. further to that, someone who already plays and instrument or sings (in-tune), might typically be good candidates for being part of your sound crew. however that is a tricky one in that if someone is a very good musician, then they may have a preference for being part of the 