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.