In American football, an audible is when the QB, just before the start of the play, changes the pre-determined play at the line of scrimmage. Essentially, it's a immediate adjustment! The QB might notice something on https://xem-bng-trc-tip-ko-nh-ci629919.tinyblogging.com/the-is-an-play-call-in-american-football-an-easy-look-86341098