Walt Disney wanted Mickey to have an impact in the animated world and he saw that the future lay with integrating the visual and the musical worlds together. This did not mean, in the eyes of Disney, a soundtrack addition in the background, but it meant synchronizing motion, sound, music and dialogue. It also meant giving each character a different voice and a way of articulating speech, which played a major role in defining the Disney characters. Donald Duck, Goofy and Mickey Mouse are all examples of the way in which sound and voice play an important part in defining the unique personalities of each character. For example, Goofy’s silly, harmless and gullible personality shines through his silly and optimistic tone of voice.