A composer of wide range, Mostel founded the acclaimed Tibetan Singing Bowl Ensemble in 1983 (named after the ensemble's major instrument rather than the nationality of the players) to explore new acoustic realms. The sounds are limited to universals and the music resembles what one can hear in a dream. Acoustic demonstrations of fractals in action, the Ensemble's recordings are the next best thing to being there! His music has been commissioned by the likes of WNYC-FM, Toshiba/EMI, Cathedral of St. John the Divine, and has been performed at Alice Tully Hall, Merkin Hall, The Asia Society, Alliance Francaise, among others. He has been invited to lecture at schools including Brown, Princeton, NYU, Vassar, and the New School. He has received fellowships from the Japan Foundation, Foundation for Contemporary Performance Arts and Vaddo. In addition to lecturing and giving workshops, he does freelance writing for publications like The New York Times. The Library for the Performing Arts at Lincoln Center will feature an exhibition on his compositions in Jan-May, 1996.