THE CLEVELAND PLAIN DEALER - Moravian singer enchants in collaboration with string quartet

People often call voices instruments, but in the case of Iva Bittova, no other word applies. Her throat is truly a musical tool, a powerful, widely adaptable implement at her disposal.Bittova, a New York-based vocalist, violinist, and composer specializing in Czech culture, was the featured guest on a fascinating program Friday at the Cleveland Museum of Art. Appearing with the Los Angeles-based Calder Quartet, Bittova repeatedly found ways to weave her voice into complex fabrics of strings, creating one bewitching tapestry after another.