text: The combination of industry and cultures , jazz , blues , and rock and roll led to an outpouring of musical creativity in the 20th century , including new music genres such as the Motown Sound and techno from Detroit and house & blues music from Chicago .
simplified: The mix of industry and cultures in those cities led to new types of music in the 20th century in the Midwest , including jazz , blues , rock and roll . Techno music came from Detroit and house music and blues came from Chicago .