Leonard Cohen's earliest songs (many of which appeared on the 1967 album, Songs of Leonard Cohen) were rooted in European folk music. In the 1970s, his music encompassed pop, cabaret and world music. Since the 1980s his high baritone voice has evolved into lower registers (bass baritone and bass), with accompaniment from electronic synthesizers and female backing singers.
Over one thousand renditions of Leonard Cohen's songs have been recorded. He has been inducted into both the Canadian Music Hall of Fame and the Canadian Songwriters Hall of Fame and is also a Companion of the Order of Canada, the nation's highest civilian honour. While giving the speech at his induction into the American Rock and Roll Hall of Fame on March 10, 2008, Lou Reed described Cohen as in the "highest and most influential echelon of songwriters."
- Details from Wikipedia.org