NEW YORK (AP) -- Elmo will be carrying a tune on "Sesame Street."

A shift in how the popular puppet is deployed marks the most visible change on "Sesame Street," the children's program that begins its 43rd season on public television this week.

The "Elmo's World" segment is being phased out after 13 years. It will be replaced by a new segment called "Elmo the Musical."

Rosemarie Truglio, who is senior vice president of education and research at Sesame Workshop, says the idea is to incorporate the arts into the show's emphasis on bringing concepts in science, technology, engineering and math to its preschool-aged viewers.