His father was a theater director, his mother and his older brother Frederik opera singers, but he worked in a trade office in Copenhagen first – before following the family tradition and joining the theater. He made his debut at the Copenhagen Casino Theater on 28 October 1878 in operetta. He stayed at that theater until 1881, then he spent one year in the Danish provinces, and two at the Dagmarteatret, a low-class operetta venue in Copenhagen. 1885/86, Brun was in Stuttgart, 1887/88 in Köln, where he made considerable progress as a singer.
Discography Dansk Fonograf Magasin, 1901? 100503 Flyv fugl, flyv (Hartmann) 503 100504 Lille Karen (Heise) 504 100509 Min Sol (= 'O sole mio) (Di Capua) 509 100511 Der var engang (Lange-Müller): Se natten er svanger 511 100512 Heksen (Enna): Edzars arie 512 100513 Liden Kirsten (Hartmann): Narrens sang 513 100514 Drot og Marsk (Heise): Ranes aang 514 100518 Carmen (Bizet): Blomsterarien 518 100520 Venetiansk Serenade (Johan Svendsen) 520 100523 Postillon de Lonjumeau (Adam): Postillonvisen 523 100526 Mit hjerte og min lyre (Kjerulf) 526 100909 Du gamla, du fria (composer unknown) 909
Sources: Danmarks Elektroniske Forskningsbibliotek; Gesellschaft für historische Tonträger, Wien