This story and recording has been around for a while. If you haven’t heard it yet, check it out, and if you have, its worth another listen.
“You’ve probably heard the of the mythic Rebel Yell. It was real, and it was said to send shakes through the body of the Union soldiers as they faced the onslaught of charging rebels. Many don’t know exactly how it sounded, but thanks to a disc jockey from 1935 and modern technology, we now can play the rebel yell and experience what the Union soldiers heard.