Jan W. Morthenson has been played on NTS shows including samb_rules, with Ultra (1970) first played on 28 February 2019.

Jan W. Morthenson (born April 7, 1940 in Örnsköldsvik, Sweden) is a prominent Swedish composer, critic, and writer primarily known for his criticism of music in Sweden and his compositional styles of non-figurative music, music that aimed to avoid any relationship to past compositional techniques, and meta-music, which alluded to historical music genres in order to criticize them. Morthenson's success as a composer and intellect in Sweden is reflected by the influential positions he has held throughout his career. He was on the board for…