For nearly 30 years, he wrote and conducted virtually all of the show’s music cues and original songs. Creator Matt Groening called him “our secret weapon.”

Alf Clausen, the Emmy Award-winning composer of "The Simpsons," has died at age 84, his daughter told The Hollywood Reporter.

The Simpsons' composer Alf Clausen died May 29 at 84. He won two Emmys for Fox's animated comedy and also worked on 'Moonlighting,' 'ALF' and other TV shows.