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This question comes from the search on soundrolling.com. in the interest of answering and providing as much content and context as possible.

What is Dolby Digital?

Dolby digital is firstly a company that set what is arguably a main standard for sound in the cinema.

Dolby Digital is the name for audio compression technologies developed by Dolby Laboratories. It was originally named Dolby Stereo Digital until 1994. Except for Dolby TrueHD, the audio compression is lossy.

The first use of Dolby Digital was to provide digital sound in cinemas from 35mm film prints.

Is Dolby Digital The Same As Surround Sound?

So the answer is yes in general terms but with many cinemas being fitted with Dolby digital as a standard. If you pay the royalty then your mix will essentially be calibrated exactly like a lot of cinemas.

The downside is that if you are renting a studio in a Dolby suite it is likely going to cost more for the privilege.