An ecstatic array of non-electronic repetition will be explored during "A World In Trance", four nights of transporting sounds from half-dozen counties. The powerful Mauritanian griot singer Noura Mint Seymali & her dazzling guitarist husband, Jeiche Ould Chighaly, commence the festivities tonight with Bailo Bah & Sylvian Leroux, who play the pastoral flute music of West Africa's Fula people. Saturday is devoted to virtuosic Sufi praise songs via the dynamic Pakistani qawwali group led by Farid Ayaz & Abu Muhammad. Accompanying himself on sintir, a three-stringed, goatskin-covered bass lute, Marrakesh-born Hassan Hakmoun will perform Gnawa ritual music on Sunday. The spell lifts Monday following the overtone-rich "throat singing" of Tuva's Alash, with Ned Rothenberg & Glen Velez improvising transnational trance music on woodwinds & frame drum, respectively.