Walt Disney Records will release the soundtrack on Oct. 30.
"What's unusually ambitious and successful about 'Wreck-It Ralph' is you have the opportunity to do really pop electronic things and then later there's really profound, emotional moments," Jackman told Billboard at one of the final scoring sessions. "Basically you need to bring all of your paints because the story has so many requirements. It's a field day for a composer."
Henry Jackman oversees the recording of the score to Disney's "Wreck-It Ralph" on the Sony lot.
Jackman began working on the score when the film was a series of storyboards. He began tinkering with different ideas, some electronic, some traditional, but one thing was certain: "No way could we get away with a textural score. If you don't have central themes you've failed. You have to have the music tell the story being told on the screen. Otherwise you can't deliver all the narrative you are supposed to deliver."
"Wreck-It Ralph" wanders through different eras of arcade games. There's the '80s-era, 8-bit video-game world of Fix-It Felix, Jr., the modern shooter game Hero's Duty and the candy-coated cart-racing game Sugar Rush. Each section required different cinematography, animation styles and music.
The solo directorial debut of "Simpsons" veteran Rich Moore, "Wreck-it-Ralph" features the voices of John C. Reilly, Sarah Silverman, Jack McBrayer ("30 Rock") and Jane Lynch.
Jackman ("Winnie the Pooh," "X-Men: First Class") researched arcade game music to come up with his score, which combines electronic elements and a full orchestra.
"We can have all sorts of fun, but critically it's an emotional story -- which is why I was so hung up on the 'Wreck-It Ralph' theme," Jackman says, noting that the theme's idea came to him while waiting for an intern to pick him up after a dentist's appointment. "It doesn't matter whether you play it on a computer or an oboe, you've got all your eggs to make an omelet. Hear it played on a synth, on clarinet, you hear it with warmth."