Career
His work with the band Samla Mammas Manna, in the late 1960s and early 1970s and up to 2002, when the re-formed group played at the two-day ProgDay festival in North Carolina, was and is considered progressive rock. He has also composed extensively for Swedish film, as well as for theatre and dance productions. Consistent elements of his music throughout his career included use of irregular time signatures (often changing several times within a piece), a daring sense of improvisation (particularly vocal improvisation that utilized nonsense syllables), and used complex polyrhythms.
Hollmer died in December 2008 of cancer, aged 60.