Guttormsen has composed music for a number of Norwegian artists like Anne Grimstad Fjeld, Agnes Buen Garnås, Knut Buen, Lars Vik (Fritjof Fomlesen), Kine Hellebust to mention some.
He was born in Kongsberg; the son of folk musician Anders Buen and Margit Tjønn, and is brother of Hauk Buen and Agnes Buen Garnås.
Agnes | Ágnes Heller | Agnes Monica | Buen Retiro Park | Agnès Varda | Agnes Varda | Agnes Nixon | Agnes Giebel | Agnes Gund | Agnes de Mille | Agnes Chan | Agnes Baltsa | Knut Buen | King Edward VII's Hospital Sister Agnes | Hurricane Agnes | Ágnes Szokolszky | Ágnes Szávay | Agnes of France, Duchess of Burgundy | Agnes Mary Frances Duclaux | Agnès Humbert | Agnes Buen Garnås | The Eve of St. Agnes | St Anne and St Agnes | St Agnes | Sara Agnes Rice Pryor | Burton Agnes Hall | Alas Agnes | Agnes Walsh | Agnes von Kurowsky | Agnes Samaria |
Apeland contributes on numerous album releases by Nils Økland (1995–), Reidun Horvei (1998), Ingeleiv Kvammen and Olav Kvammen (2000), Åsne Valland Nordli (2001), Marylands (2001), and Agnes Buen Garnås (2002).