Gunnar Berg (1909-1989) GAFFKY's. Peter Seivewright performs the Danish composer Gunnar Berg's legendary and unique piano masterpiece GAFFKY's complete. Composed in 1959, this is the British premiere of GAFFKY's. Gunnar Berg's music was greatly admired by his close contemporary Olivier Messiaen (1908-1992), and Berg shares with Messiaen an ability to compose music which is simultaneously modernistic and approachable. Berg's unique approaches to rhythm and harmony give his music a phenomenal sense of forward propulsion. Gunnar Berg genuinely is an original genius.