Mickey Mouse
Audiences at the time of "Steamboat Willie"'s release were reportedly impressed by the use of sound for comedic purposes. Sound films or "talkies" were still considered innovative. The first feature-length movie with dialogue sequences, "The Jazz Singer" starring Al Jolson, was released on October 6, 1927. Within a year of its success, most United States movie theaters had installed sound film equipment. Walt Disney apparently intended to take advantage of this new trend and, arguably, managed to succeed. Most other cartoon studios were still producing silent products and so were unable to effectively act as competition to Disney. As a result, Mickey would soon become the most prominent animated character of the time. Walt Disney soon worked on adding sound to both "Plane Crazy" and "The Gallopin' Gaucho" (which had originally been silent releases) and their new release added to Mickey's success and popularity. A fourth Mickey short, "The Barn Dance", was also put into production; however, Mickey does not actually speak until "The Karnival Kid" in 1929 when his first spoken words were "Hot dogs, Hot dogs!" After "Steamboat Willie" was released, Mickey became a close competitor to Felix the Cat, and his popularity would grow as he was continuously featured in sound cartoons. By 1929, Felix would lose popularity among theater audiences, and Pat Sullivan decided to produce all future Felix cartoons in sound as a result. Unfortunately, audiences did not respond well to Felix's transition to sound and by 1930, Felix had faded from the screen.
Kinetoscope
The Kinetophone (aka Phonokinetoscope) was an early attempt by Edison and Dickson to create a sound-film system. Reports suggest that in July 1893, a Kinetoscope accompanied by a cylinder phonograph had been presented at the Chicago World's Fair. The first known movie made as a test of the Kinetophone was shot at Edison's New Jersey studio in late 1894 or early 1895, which is now referred to as The Dickson Experimental Sound Film; this film, along with a short film from 1913 called Nursery Favorites and a 1912 demonstration film, are the only surviving movies with live-recorded sound made for the Kinetophone. In March 1895, Edison offered the device for sale; involving no technological innovations, it was a Kinetoscope whose modified cabinet included an accompanying cylinder phonograph. Kinetoscope owners were also offered kits with which to retrofit their equipment. The first Kinetophone exhibitions appear to have taken place in April. Though a Library of Congress educational website states, "The picture and sound were made somewhat synchronous by connecting the two with a belt," this is incorrect. As historian David Robinson describes, "The Kinetophone...made no attempt at synchronization. The viewer listened through tubes to a phonograph concealed in the cabinet and performing approximately appropriate music or other sound." Historian Douglas Gomery concurs, "[Edison] did not try to synchronize sound and image." Leading production sound mixer Mark Ulano writes, "[O]nly 45 Kinetophones were made. They did NOT play synchronously other than the phonograph turned on when viewing and off when stopped." Though the surviving Dickson test involves live-recorded sound, certainly most, and probably all, of the films marketed for the Kinetophone were shot as silents, predominantly march or dance subjects; exhibitors could then choose from a variety of musical cylinders offering a rhythmic match. For example, three different cylinders with orchestral performances were proposed as accompaniments for "Carmencita": "Valse Santiago", "La Paloma", and "Alma-Danza Spagnola".