We are a globally recognized innovator of sound, image, and voice technologies for cinemas, home theaters, PCs, mobile devices, and games.
Careers at Dolby
The Dolby Theatre
The Magic Inside Dolby
The Dolby Institute
Dolby in the Cinema
Dolby works with your favorite filmmakers and movie theaters to create a multidimensional cinema experience.
Buy Tickets for Star Wars
Dolby Surround 7.1
Solutions for Distributors and Exhibitors
Dolby at Home
Transform your living room into a sophisticated home theater with amazing sound and true-to-life video quality.
Dolby Digital Plus
Home Theater Setup Guide
Speaker Setup Guide
Home Theater Products
Solutions for Broadcast Professionals
Dolby on the Go
Mobile devices with Dolby technologies dramatically improve your audio quality.
Drivers and Codecs
Solutions for Mobile and PC Professionals
Dolby at Work
Improve productivity by transforming the conference call into an in-person meeting experience with Dolby Voice and the Dolby Conference Phone.
Dolby Conference Phone
Partners and Professionals
Find Dolby solutions, services, and support that can help you create more engaging products, content, and entertainment experiences.
PC and Mobile
Dolby Digital Surround EX increases the realism of movies by introducing an additional rear audio channel to the cinema for 6.1-channel cinema sound.
Dolby® Digital Surround EX™ adds a center rear audio channel to the Dolby Digital 5.1-channel cinema setup, giving filmmakers greater control over the placement of sounds in the theatre.
Rear-wall surround speakers located directly behind the audience reproduce the additional Surround EX channel, while speakers located on the side walls reproduce the Left and Right Surround channels.
For cinemas not equipped with rear-wall surround speakers, the traditional Left and Right Surround channels fill in. This allows content encoded in Surround EX to be played in any cinema equipped with 5.1-channel Dolby Digital decoding.
Surround EX soundtracks on DVD support 6.1-channel audio in the home, provided that the playback system features Dolby Digital EX and the speakers that are required for 6.1 channels of sound.
Sound surrounds you in real life, and Dolby Digital Surround EX ensures that it surrounds you at the movies, too. With the introduction of a rear surround audio channel—and new speakers on the back wall of the theatre—Surround EX takes the Dolby Digital 5.1-channel setup one step further.
The audio experiences we take for granted outside the theatre now sound true to life in the theatre. Imagine a scene in which one character pursues another on foot. In Dolby Digital Surround EX, you'll hear the footsteps of the pursuer approaching from behind, growing louder as the distance between the two characters diminishes. With each footstep, the dramatic tension rises. Moments like these define the cinema experience.
Special effects also benefit from Surround EX. The additional rear surround channel clarifies audio effects that pan from front to back—an asteroid that narrowly misses hitting your spaceship, for example—and gives sound designers more control over the placement of sound in the theatre.
You can enjoy the benefits of Dolby Digital Surround EX at home, too. The cinema versions of films released in Surround EX carry the extra surround audio channel in subsequent DVD releases as well as in 5.1-channel digital satellite and TV broadcasts.
If your home theater system has the speakers to support 6.1-channel playback and your A/V receiver or preamp/processor includes Dolby Digital EX decoding, you're ready to go.
List of studios in Latin America equipped to mix with Dolby Technologies.
See the list of studios
Log in to the Dolby Customer portal for help with your customer or partner account.
Apply for a license to include Dolby technologies in your products.
More Like This
Lose yourself in a captivating cinematic experience when you watch movies at a Dolby theatre.
Movie Theater Locator: Find a Theatre with Dolby Sound
Find a theatre near you equipped with Dolby Atmos, Dolby Surround 7.1, or Dolby 3D.
Dolby Atmos in the Cinema
Experience cinema sound that has astonishing clarity, richness, detail, and depth.
Who We Are