[3][4] In the memoir book 3 fra Sachsenhausen fellow prisoner and newspaper editor Olav Larssen recalls cultural activities in the camp, and mentions that Brunvoll would sing in such a way that prisoners forgot their surroundings, both at Grini and Sachsenhausen.
[4][6] Brunvoll made his debut as opera singer in 1941 as Colline in La Boheme at Trøndelag Teater.
Some of his major opera roles were Colline "La Boheme" (Puccini), Mefisto "Faust" (Gounod), Zuniga "Carmen" (Bizet), Figaro "Figaros Bryllup" (Mozart), Jeppe "Jeppe" (G. Tveitt), Leporello "Don Juan" (Mozart), Papageno "Tryllefløyten" (Mozart), Don Basilio "Barbereren i Sevilla" (Rossini), Nick Shadow "The Rake’s Progress" (Stravinsky).
[1] He participated in several films, including Døden i gatene from 1970, Rallarblod from 1979 and Arven from 1979, where he played "The Priest".
He also participated in the 1972 TV production Fjeldeventyret for Fjernsynsteatret, where he played the role of a district sheriff.