 Connie Hedegaard and Claus Hagen Petersen list him among the 100 most important Danes of the 20th century.Andersen was originally a bank clerk, but began composing for revues, studied music, and in 1919 became a full-time musician.He became director of revue productions in Copenhagen before extending his range into film and plays (by Kaj Munk and Kjeld Abell amongst others).