Ruth Escher Ruth Escher, soprano, is based in the Bay Area and is a member of the ensemble Magnificat, directed by Warren Stewart. She has participated in Musica Omnia’s complete works of Chiara Margarita Cozzolani. Performed in: Chiara Margarita Cozzolani: Christmas Vespers Chiara Margarita Cozzolani: Concerti Sacri (1642) Performed compositions by: Chiara Margarita Cozzolani Chiara Margarita Cozzolani