Burt Bacharach was an American composer, songwriter, and music producer known for his sophisticated pop melodies and collaborations with lyricist Hal David. Active mainly from the 1950s through the 1980s, his music blended elements of jazz, pop, and classical styles. Bacharach's work was characterized by unusual chord progressions and time signatures, earning him widespread acclaim. He composed scores for films and wrote hits for numerous artists, making him one of the most influential figures in 20th-century popular music.