Like Dr. Frankenstein, Paul Hindemith took a few used parts from a long-dead composer and electrified them into something huge and powerful. The unwitting donor? That would be Carl Maria von Weber. His charming little tunes and marches served as the raw material for today's monster with a heart of gold, Hindemith's "Symphonic Metamorphoses on Themes by Carl Maria von Weber." We'll hear it from a concert in Los Angeles.