Lasse Hallström | Lasse Virén | Lasse Paakkonen | Lasse Åberg | Lasse Marhaug | Lasse Strömstedt | Lasse & Geir | Lasse Berghagen | Lasse Qvigstad | Lasse Petterson | Lásse Kvernmo | Lasse Hoile | Lasse Dahlquist | Lasse Braun | Inger and Lasse Sandberg | Carl E. Thoresen |
He studied at the State Academy of music (Norges musikkhøgskole) (Lasse Thoresen, composition; Olav Anton Thommessen, orchestration; Bjørn Kruse, arranging; Mads Claesson, Arild Erikstad og Tore Simonsen, music technology; Otto Berg, viola), and at Hochschule (now Universität) der Künste Berlin (Witold Szalonek, composition).
In the United States and abroad, he has premiered and recorded works of many contemporary composers, including Charles Wuorinen, Milton Babbitt, Elliott Carter, Lasse Thoresen, Gerard Grisey, Jonathan Dawe, Tristan Murail, Ralph Shapey, Luigi Nono, Mario Davidovsky, and Wolfgang Rihm.