Deep Note

The Deep Note is THX's sound trademark, a distinctive synthesized crescendo that glissandos from a relatively narrow frequency spread to a broader frequency spread. It was created by James A. Moorer, a former employee of Lucasfilm's Computer Division in late 1982. The sound is used on trailers for THX-certified movie theaters, home video releases, video games, and in-car entertainment systems.


The Deep Note is THX's sound trademark, a distinctive synthesized crescendo that glissandos from a relatively narrow frequency spread to a broader frequency spread. It was created by James A. Moorer, a former employee of Lucasfilm's Computer Division in late 1982. The sound is used on trailers for THX-certified movie theaters, home video releases, video games, and in-car entertainment systems.
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