Originally developed back in 1983 by Lucasfilm’s Tomlinson Holman as a way to ensure that the sound for Star Wars: Return of the Jedi would be accurately reproduced in theaters, THX is a quality control and certification system that takes into account everything from a cinema’s acoustic performance to the screen and projector’s image quality to even the amount of background noise heard inside the theater. Most audiences probably couldn’t hear the difference between a THX certified theater and one that wasn’t, but what made THX popular among many movie fans was the iconic Deep Note glissando that played ahead of the film, which had originally been created by Lucasfilm’s James A. Moorer.

Advertisement
Advertisement

The Deep Note trailer evolved over the years from a simple blue box surrounding giant versions of the THX logo to complex animations that showed off the surround sound capabilities of theaters. It was as much a part of seeing a movie as were the film trailers that preceded it, but over time the Deep Note disappeared. Think back to the last time you saw it in front of a movie, it was probably ages ago, right? Even trying to find a THX certified theater isn’t easy now. Fierce competition from other certification programs like Dolby and DTS whittled away at the number of THX certified cinemas, and as moviegoers started to embrace home theaters and technologies like Blu-ray, so did THX.

The company expanded its certification program to home theater and mobile products, including sound cards after THX was bought by Creative Technology Limited back in 2002. Today THX is owned by Razer, and while it continues to certify multimedia products and consumer gear, it does still have a presence in the film industry and movie theaters. But depending on where you live, you might have to do some digging, and quite a bit of driving, to find a THX-certified theater playing this new Deep Note trailer in all its glory. We found just one within a 25-mile radius of our offices in New York.