Audio Codec 3 File
Dolby Digital is a audio compression technology developed by Dolby Laboratories. Dolby Digital which uses the .ac3 file extension supports multi channel configurations from mono to six channel surround.
AC3 was first used in Cinemas but has since found its way in to the home and is found on DVDs and Blu-ray discs, is used for broadcasting and often found in gaming consoles to add the use of surround sound.
How to open .ac3 files?
Software to open .ac3 files
What are .ac3 files