The Mothers of Invention were an American band active from 1966 to 1969. Throughout, their output was primarily directed by composer and guitarist, Frank Zappa (1940–1993). Their albums combined a broad span of genres and utilised diverse instrumentation. Their lyrics were generally humorous, with frequent style-parodies of contemporary Pop music (with doo-wop love ballads endlessly lampooned), bountiful surreal imagery, cartoonish vocals and oblique, satirical protest songs.