Sufi brotherhoods have handed down their religious repertoires by word of mouth since the fifteenth century. Compositions by the great Muslim mystical poets are performed during ecstatic religious celebrations and ceremonies. Although harshly treated and virtually condemned to clandestine gatherings during the communist era, the Sufi orders have kept this tradition alive. The songs convey an extraordinary spiritual force. Sung in groups or individually, and accompanied only by the drum, the Neshidu-I-Huda vocal ensemble presents these melodies outside the religious context, which is rare, if not indeed unique, in a stunning performance at the annual Festival Imaginaire held in Montpellier, France.