Music plays a major role in expressing the themes of The Amen Corner The two types of music: jazz music and church music, reflect the struggle between two sets of values within the play. The Church music represents Margaret's religious fervor and conviction while the Jazz represents Luke's desire to approach life through the human emotion of Love. The actual music in the play expresses the struggle between these two values as they are heard at key moments in the action. Enotes has an excellent essay on this issue by Liz Brent in the Criticism and Essay section of the Enotes of the play. I suggest that you consult the essay for a more in depth discussion.