Aaron Schroeder, 84, the songwriter behind the Elvis Presley hit "It's Now or Never," died Tuesday in Englewood, N.J. His publicist, Dale Olson, said Mr. Schroeder had been suffering from a form of Alzheimer's disease.

Olson said Mr. Schroeder was credited with writing 2,000 songs and wrote several hits for Presley, including "Stuck on You" and "A Big Hunk O' Love."

Mr. Schroeder was also a producer, credited with helping the young careers of Jimi Hendrix and Barry White. He also wrote the theme song "Scooby-Doo, Where Are You!"

Survivors include his wife, Abby, and daughter Rachel. - AP