the image as necessary to produce distortions for effect in combination with a background without altering the original illustration. The effect is re-added back into the shot to complete the scene. While the visual displays used in the film were technically simple to create, the appearance of the displays underwent numerous revisions by the production team to best represent visual displays of the future. Another aspect of the CG use was to create images and effects that looked as if they were "perceived by the brain" and were generated in video and added to the film in its final stages. The opening credits of the film were produced by the CG director, Seichi Tanaka. Tanaka converted code in a computer language displayed in romanized Japanese letters to numbers before inserting them into the computer to generate the credits. The origin of this code is the names of the film's staff as written in a computer language. Animation director Mizuho Nishikubo was responsible for the realism and strove for accurate depictions of movement and effects. The pursuit of realism included the staff conducting firearms research at a facility in Guam. Nishikubo has highlighted the tank scene as an example of the movie's realism, noting that bullets create sparks when hitting metal, but do not spark when a bullet strikes stone. Audio Ghost in the Shells recording was done with a high-end studio to achieve superior sound throughout the film. A spatializer was used to alter the sound, specifically in the electronic brain conversations, to modify the voices. Composer Kenji Kawai scored the film. For the main theme, Kawai tried to imagine the setting and convey the essence of that world in the music. He used classical Japanese in the opening theme "Making of a Cyborg". The composition is a mixture of Bulgarian harmony and traditional Japanese notes; the haunting chorals are a wedding song sung to dispel all evil influences. Symphony conductor Sarah Penicka-Smith notes that the song's lyrics are fitting for the union between Kusanagi and Project 2501 at the climax of the movie. Kawai originally wanted to use Bulgarian folk music singers, but used Japanese folk singers instead. "See You Everyday" is different from the rest of the soundtrack, being a pop song sung in Cantonese by Fang Ka Wing. The ending credits theme of the film's English version is "One Minute Warning" by Passengers, a collaboration between U2