Career
He has collaborated with the film director Olav Neuland and written the soundtracks for the most of his films. In the 1970s Grünberg was the leader of the progressive rock band Mess, which was founded by him in January 1974 together with Härmo Häroom Despite years of the band"s existence and many live performances, Mess did not release a single studio album because of the contradictions of their musical style with the Soviet ideology.
Only in 1996 did Grünberg release a compilation from several surviving Mess recordings and a full remastered album in 2004.
Mess Mess (1996) Küsi eneselt (2004).