Different Trains is a three-movement piece for string quartet and tape written by Steve Reich in 1988
Reich, an American composer born in 1936, spent his childhood shuttling by train between his divorced parents’ homes during World War II. After he became a composer, he began to wonder how his life might have been different if he had been a European Jew, rather than an American. He felt that trains might still have played an important part of his life, taking him to a ghetto and an extermination camp. He wrote a unique and interesting composition for string quartet and synthesizers (from the site A Teacher’s Guide to the Holocaust)
מוזיק אין חורבן | Music in the Holocaust 