By his own choice, Nussen did not participate in public concert life, but there was nothing amateurish about his music, which unfailingly reveals excellent musical training, abundant inventiveness and a talent for combining new stylistic traits with old ones. His six string trios, published in 1774, show how successfully he expanded his musical language near the end of his life to accommodate the stylistic and structural innovations of the classical style.

 Music example: Sonata 1 (pdf)
 Music example: Sonata 2 (pdf)
 Music example: Sonata 3 (pdf)
 Music example: Sonata 4 (pdf)
 Music example: Sonata 5 (pdf)
 Music example: Sonata 6 (pdf)