As a child, Andrej took piano lessons from la Polakova. In 1977 he had classical guitar lessons from Pavel Malovec, which helped him to become a member of the pop band Nervy the same year. He also studied music with professor Boris Thurzo. Andrej was in the jazz rock band Miting during 1978 and 1979. From 1980 to 1983 he was member of the band Demikát, and from there until 1986 he was musicology department faculty at Comenius University. In 1986 Andrej wrote the score for the film Salty Candies.
From the University, Andrej became a member of the Army Artistic Ensemble, where he met Richard Müller and became co-leader of the pop band Banket until 1990. He was also in Peter Lipa's Combo until 1989. From then until 1993, Andrej played with the fusion band Tutu. With the ASH Band Andrej toured England in 1993. From 1992 to 1995 he was with the band Provisorium, also.