 The General Lees famous "Dixie" horn wasnt originally planned;  when the producers were driving in Atlanta during the first few  episodes, they heard a car pass with a "Dixie" horn and chased the  driver down and convinced him to sell the horn. They later realized  that it was a novelty horn which could be purchased at any auto  parts store for a third of what they paid for it. The horn was only  used in the first five episodes. Once filming moved to the Warner  Brothers lot, the horn was edited in during post