The world music scene is hungry for new sensations - and Omar Souleyman, about to hit London and the Shambhala Festival, well deserves to be one of them. In the early 1980s the hunger for the exotic focused on anything that came from the parallel universes untouched by the pressures of commercialisation: polyphonic pygmy singing from Central Africa, ecstatic Sufi soul doctors from Pakistan, drone-drenched bagpipe players from Bulgaria or heart-invading praise singers from Mali. Souleyman is the singer in a small band that plays dabke music at weddings in Syria.