Accordion, tuba, piano. Train polka is music played in the form of an orchestral ensemble, with accordion, piano, and tuba playing simultaneously to imitate the sound of a train whistle. Polka is a kind of folk dance music in the Czech Republic. It originated in Bohemia in the mid-19th century. It mainly dances between men and women. Its music is characterized by fast and lively rhythm. In the mid-19th century, polka spread to Britain and the United States and replaced the waltz together. The country dance and cotyline dance became popular throughout Europe.