Composer Portrait: Anna Thorvaldsdottir

Once in a while, a composer bursts upon the scene seemingly fully formed, with a sound complete and already distinct. Anna Thorvaldsdottir, whose music combines of-the-moment technique with elemental power and her native Iceland's mystic allure, is such a composer, an impression confirmed by her 2011 debut album, Rhízōma. For this big NYC splash, Either/Or plays that disc's first piece, Hrím, plus four others new to the city. Two words: Be there.