THX Movie Opening

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About this sound

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The THX movie opening is the deep rising Deep Note played before films in certified theaters, now used online to parody epic intros and big reveals.

The THX movie opening is the famous Deep Note, a synthesized chord that starts as a low, chaotic rumble and slowly rises into a powerful, shimmering swell that fills the room. It lasts about thirteen seconds, building from scattered tones into one unified, overwhelming pitch that feels both futuristic and ceremonial. Listeners recognize it instantly from cinema trailers and home theater intros, where it signaled premium sound quality. Online, that same grandeur is used ironically, turning an ordinary clip, announcement or reveal into something that feels absurdly epic and important.

The Deep Note was created by Lucasfilm computer scientist James A. Moorer and first played in theaters with Star Wars: Episode VI - Return of the Jedi in 1983. It was designed to showcase THX, the theater certification system developed by Lucasfilm to guarantee high-quality reproduction. The sound became inseparable from the glowing THX logo trailer shown before features for decades. As home video, DVDs and later memes spread, audiences began recreating and parodying the trailer, using its serious build-up to introduce deliberately unimportant content for comic contrast.

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Frequently Asked Questions

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What is the THX movie opening sound?

It is the Deep Note, the THX logo trailer sound. A synthesized chord begins as a low scattered rumble, rises in pitch and volume, and resolves into a loud sustained swell that was played before movies in certified theaters.

Where did the THX Deep Note come from?

It debuted in 1983 with Star Wars: Episode VI - Return of the Jedi. Created by James A. Moorer for Lucasfilm, it introduced the THX trailer meant to demonstrate that a theater met strict picture and sound standards.

Why do people use the THX opening online?

Creators use it as an ironic epic intro. Placing the serious cinema swell before a mundane clip, small announcement or silly reveal creates contrast, because the audience expects something grand and instead gets something deliberately ordinary or funny.