page_title: THX
section_title: Applications
hierarchical_section_title: THX / Applications
caption_attribution_description: English: The Eileen Norris Cinema Theatre (aka Norris) at the University of Southern California in Los Angeles, California.
context_page_description: THX Ltd. is an American company founded in 1983 by George Lucas and it is headquartered in San Francisco, California. It develops the "THX" high fidelity audio/visual reproduction standards for movie theaters, screening rooms, home theaters, computer speakers, gaming consoles, car audio systems, and video games. THX Ltd. is a subsidiary of Razer Inc..
  The current THX was created on June 12, 2002 when it spun off from Lucasfilm Ltd. THX was developed by Tomlinson Holman at George Lucas's company, Lucasfilm, in 1983 to ensure that the soundtrack for the third Star Wars film, Return of the Jedi, would be accurately reproduced in the best venues. THX was named after Holman, with the "X" standing for "crossover" or "experiment" as well as in homage to Lucas's first film, THX 1138. The distinctive glissando up from a rumbling low pitch used in the THX trailers, created by Holman's coworker James A. Moorer, is known as the "Deep Note".
  The THX system is not a recording technology and it does not specify a sound recording format: all sound formats, whether digital or analog, can be "shown in THX". THX is a quality assurance system.
context_section_description: The first theater THX was used in was the University of Southern California's Eileen L. Norris Cinema Theatre, a part of USC's film school.
caption: Norris Cinema Theatre, on the University of Southern California campus, where THX was first developed and installed.
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