Technically soundtrack, soundtrack (a term also known as original soundtrack) is the full sound and the result of ing of various audio tracks, both dialogues, sounds and music of a work or the accompanying parallel. Normally, with rare exceptions, the term refers only to the music of a film or marketing of the musical themes of a work like video games, television and radio. From a musical standpoint, it is understood as a soundtrack that both vocal and instrumental music composed expressly for a film, fulfilling the purpose of enhancing those feelings that pictures alone can not express.Famous composers are Ennio Morricone soundtracks (The Good, the Bad and the Ugly, The Mission, Cinema Paradiso, etc..), John Williams (Jaws, Star Wars, Indiana Jones, etc.) Vangelis (Blade Runner, Chariots of Fire, 1492: Conquest of Paradise), Hans Zimmer (The Lion King, Gladiator, Pirates of the Caribbean film series, etc..) or Danny Elfman (Beetlejuice, Edward Scissorhands, The Nightmare Before Christmas, Sleepy Hollow, Planet of the Apes (2001), Big Fish, Corpse Bride, etc.).. The soundtrack to a movie in a physical sense can be of two types: magnetic or optical. In the first case, one or more magnetic recording bands run along the edges of the filmstrip. These lines to be read by a device in synchrony with the projection, the sounds are generated in a similar manner as would a cassette player. In the case of optical soundtracks, these are areas of darkness and light in one or both sides of the tape of the film.The different intensities of light are then converted into electrical impulses to create the entire soundtrack. They are also used, although not as frequently still, digital sound systems, based on points on the film to be converted by various methods, some still experimental in sound.