Hey guys, I have a PA system with a nice mixer, and i dont really feel like spending a whole 100 dollars or more on a separate mixer. I was wondering if i could plug all the instruments into the PA either going DI from the amp, or a microphone for the horns, and then get one of those cables that goes from the Main Left and Right to a 1/4 cable.(Not sure what its called, im a total recording noob) And plug the 1/4 end into my audio interface, and then run that through garage band, and have each track set to a different input, and record all of the musicians simultaneously. I was wondering if this is even possible. And once again i know... Im a total noob when it comes to recording.