The a capella musical selections are inspired by and based on the scriptures of the world's religions. The multi-cultural programs include classical choral arrangements, new Bahá’í Gospel compositions, traditional folk songs, and Negro spirituals. The concerts are sung entirely a capella, in four or more parts. Singers memorize their parts so they can sing without sheet music, and be totally focused on the director and each other. The music is offered as sacred, devotional prayer. The festivals provide opportunities for diverse singers to share their musical experience, to learn from one another, to form fast friendships and to pray together. Some singers are accomplished, trained musicians, while others sing simply for the love of it.