Jan Hammer (Czech pronunciation: [ˈjan ˈɦamɛr]) (born 17 April 1948) is a Czech-American musician, composer and record producer.He first gained his most visible audience while playing keyboards with the Mahavishnu Orchestra in the early 1970s, as well as his film scores for television and film including "Miami Vice Theme" and "Crockett's Theme", from the 1980s television program, Miami Vice. He has continued to work as both a musical performer and producer, expanding to producing film later in his career.