Joseph Raposo, a composer who helped create the children's television show "Sesame Street," died Sunday of complications from lymphoma at Lawrence Hospital in Bronxville, N.Y. He was 51.

Raposo was co-author of the hit play "You're a Good Man, Charlie Brown" and of the public television show "Electric Company," the New York Times said Monday. In addition, he was the longtime music director of "Sesame Street," the show he created with Jim Henson and Jon Stone.He won five Grammy awards and a had a flair for writing and orchestrating instructive songs. His compositions include "Sing," "Bein' Green," "You Will Be My Music," "There Used to Be a Ball Park," and "Somebody Come and Play."

Raposo, a resident of Bronxville and Chatham, Mass., is survived by his wife, Pat Collins, arts-and-entertainment editor of the television station WOR, three sons and a daughter.