London - At an evening concert during the Fes Festival of World Sacred Music, bemused European tourists and enthusiastic Moroccans sit side by side and watch the musicians enter holding candles. At a festival in Australia, the audience gazes open-mouthed as the rhythm gains pace and a woman in blue begins to trance, her long hair brushing the floor of the stage as she sways her head from side to side. In a house in Fes, teenage boys in fake designer caps and sneakers sit with their master learning the chants of the Sufi brotherhood.

Faith Barker studied Arabic and Spanish at the University of Cambridge.