Nummer 2

Nummer 2 for thirteen instruments (also called Opus 2 for thirteen instruments) is a composition written in 1951 by the Belgian composer Karel Goeyvaerts. Nummer 2 has been claimed as the first "total serial" composition. though the same claim has been made for Milton Babbitt's Three Compositions for Piano (1947), which predates Goeyvaerts's work by four years.