A large part of Mickey's screen persona is his famously shy, falsetto voice. From 1928 onward, Mickey was voiced by Walt Disney himself, a task in which Disney took great personal pride. Composer Carl W. Stalling was the first person to provide lines for Mickey in the 1929 short "The Karnival Kid", and J. Donald Wilson and Joe Twerp provided the voice in some 1938 broadcasts of "The Mickey Mouse Theater of the Air", although Disney remained Mickey's official voice during this period. However, by 1946, Disney was becoming too busy with running the studio to do regular voice work which meant he could not do Mickey's voice on a regular basis anymore. It is also speculated that his cigarette habit had damaged his voice over the years. After recording the "Mickey and the Beanstalk" section of "Fun and Fancy Free", Mickey's voice was handed over to veteran Disney musician and actor Jimmy MacDonald. Walt would reprise Mickey's voice occasionally until his passing in 1966, such as in the introductions to the original 1955–1959 run of "The Mickey Mouse Club" TV series, the "Fourth Anniversary Show" episode of the Walt Disney's Disneyland TV series that aired on September 11, 1957 and the "Disneyland USA at Radio City Music Hall" show from 1962.