Initially, Nørholm's music was very much in the tradition of Carl Nielsen, as exemplified by his first symphony (1956-8). In the 1960s, however, Nørholm began to explore the possibilities of serialism and graphic scores, having been deeply impressed by his experiences of the music of Karlheinz Stockhausen, Pierre Boulez, and others at the ISCM in Cologne.[1]
Later still his music took on a more economical approach, often characterised by the term 'new simplicity'.
Compositions by Nørholm include the operaThe Young Park (1969–70), Symphony No. 3 (1973), sonatas for accordion (1967) and guitar (1976), Idylles d'Apocalypse for organ and orchestra (1980), Symphony No. 5 'The Elements' (1980), Immanence for solo flute (1983), Aspects of Sand and Simplicity for string orchestra (1987), a symphonic fantasy Hearing Andersen (1987), and the choral work Sjaelfuld Sommer (1997). The opera Invitation til Skafottet("Invitation to a Beheading") (1965) was commissioned by the Danish Broadcasting Corporation.[2] In all Nørholm has written twelve symphonies.[1] His second symphony, commissioned by the Danish National Symphony Orchestra is subtitled Isola Bella, and the fourth symphony is subtitled Moderskabelsen("Mother Creation").[2] The première of his twelfth symphony, Virkeligheder on texts by Thorkild Bjørnvig, Lene Henningsen and Inger Christensen, took place in Odense on 28 April 2011.
In addition to his activities as a composer, Nørholm was a prolific music critic and choral conductor.[citation needed] He died on 10 June 2019, aged 88.[3]