African American music underwent a significant transformation with the emergence of the Jubilee Quartets in the late 19th and early 20th century. These vocal groups, which were primarily made up of four male singers, combined joyful harmonies, complex arrangements, and upbeat performances, taking their cues from African American hymns and spirituals. The Jubilee Quartets became well-known in the secular world by appearing in vaudeville and minstrel shows and influencing the nascent jazz and blues genres. These quartets formed a key component of the shift to gospel music as the decades went by. The gospel quartet tradition was established by the way they infused their performances with spiritual zeal and religious themes. This change was a turning point in the history of African American music, as gospel music started to gain popularity and resonate with a wider audience outside of the church. The transformation of the Jubilee Quartets from secular to sacred music helped to establish gospel music as a strong and enduring genre that still influences and inspires a wide range of musical expressions.