This term is not only the German equivalent of Electronic Music; it was the initial term used from 1949 (originally by Werner Meyer-Eppler) throughout the 1950s for music that was made a German radio broadcast facilities originally at the NWDR in Cologne. All sounds were electronically generated, thus not involving any acoustic recordings or acoustic or electronic instruments. This term when used outside of the German language refers to these early years and the type of formalised music based on the ordering of musical parameters that was made by early pioneers including Herbert Eimert. Elektronische Musik was the polar opposite of musique concrète.