television production, a sound effect is a sound recorded and presented to make a specific storytelling or creative point, without the use of dialogue or music. The term often refers to a process, applied to a recording, without necessarily referring to the recording itself. In professional motion picture and television production, the segregations between recordings of dialogue, music, and sound effects can be quite distinct, and it is important to understand that in such contexts, dialogue, and music recordings are never referred to as sound effects, though the processes applied to them, such as reverberation or flanging, often are. Necessary incidental units of sound, footsteps, keys, a polishing sound, are created in the foley studio. Techniques in interactive movies New techniques currently being developed in interactive movies, introduce an extra dimension into the experience of viewing movies, by allowing the viewer to change the course of the movie. In traditional linear movies, the author can carefully construct the plot, roles, and characters to achieve a specific effect on the audience. Interactivity, however, introduces non-linearity into the movie, such that the author no longer has complete control over the story, but must now share control with the viewer. There is an inevitable trade-off between the desire of the viewer for freedom to experience the movie in different ways, and the desire of the author to employ specialized techniques to control the presentation of the story. Computer technology is required to create the illusion of freedom for the viewer, while providing familiar, as well as, new cinematic techniques to the author. See also Glossary of motion picture terms Film industry Outline of film References External links Interactive Movies Sound at FilmSound.org Traditional Film Camera Techniques Cinematic Technique Blog Basic Techniques of Alfred Hitchcock Audiovisual Compendium of Film Terminology Filmmaking