Mickey Mouse universe
In "Plane Crazy" (1929), the first produced Mickey Mouse story, Mickey is seen at a farm. In all of his early films Mickey is in a rural setting, but most commonly at a farm. This setting was succinctly presented in the first sentences of one of Mickey's first storybooks:
Walt Disney
To replace Oswald, Disney and Iwerks developed Mickey Mouse, possibly inspired by a pet mouse that Disney had adopted while working in his Laugh-O-Gram studio, although the origins of the character are unclear. Disney's original choice of name was Mortimer Mouse, but Lillian thought it too pompous, and suggested Mickey instead. Iwerks revised Disney's provisional sketches to make the character easier to animate. Disney, who had begun to distance himself from the animation process, provided Mickey's voice until 1947. In the words of one Disney employee, "Ub designed Mickey's physical appearance, but Walt gave him his soul."
Mickey Mouse first appeared in May 1928 as a single test screening of the short "Plane Crazy", but it, and the second feature, "The Gallopin' Gaucho", failed to find a distributor. Following the 1927 sensation "The Jazz Singer", Disney used synchronized sound on the third short, "Steamboat Willie", to create the first post-produced sound cartoon. After the animation was complete, Disney signed a contract with the former executive of Universal Pictures, Pat Powers, to use the "Powers Cinephone" recording system; Cinephone became the new distributor for Disney's early sound cartoons, which soon became popular.