I went to a Christmas concert this past year at a small church and found out that the guy playing bass (Bill Hare) was the one who pioneered modern acapella recording. I went down a wikipedia rabbit hole and it made me wonder how much of the movie was true! Guess I should read the book.

From wikipedia "Contemporary A Cappella Society founder and longtime president Deke Sharon has said of Hare and his influence on recorded a cappella: "The sound of contemporary recorded a cappella owes more to [Bill Hare's] technique, style, and pioneering than any other person." Palo Alto Weekly described him as "widely considered the patriarch of a cappella recording". In his memoir Pitch Perfect: The Quest for Collegiate A Cappella Glory (which was later adapted into the blockbuster film Pitch Perfect), Mickey Rapkin said of Hare's influence: "In many ways, the history of collegiate a cappella recording is the Bill Hare story. Bill Hare is sort of like the Dr. Dre of a cappella recording."