African American Sacred Harp singing conventions in southeastern Alabama began near the last third of the 19th century. While singing, for the most part, the same repertory of Sacred Harp music as their Anglo American counterparts, a vocal stylistic difference is clearly apparent. During a typical convention singing the participants arrange themselves in a square according to voice part, the basses facing the trebles, and the tenors facing the altos. A song leader stands in the middle of the square leading the singers first through the notes to the songs and then through the lyrics, a practice emanating from the traditional singing school classes, where singers are taught to sing the notes and then the words.