Isaac Stern is a devotee of 20th-century music. The most recent piece, Copland's Sonata, is actually the most euphonious. Stern lets its lyrical lines sing, with excellent support from the composer at the piano. The most challenging and dramatic piece in the collection is the earliest, the Bloch Sonata, which Stern and Alexander Zakin play with all-out fervor. The Hebraic Baal Shem is one of Bloch's most often heard works, here done with great folk flavor. And Hindemith's prewar neoclassicism never sounds dry in this very knowing performance. In short, this is a great collection of 20th-century violin works that won't give anyone indigestion.