This page contains information on the AC3 file extension (Audio Coding 3), a popular video file format

AC3 AC3 (Audio)

File extension .ac3
Category Audio File
Description AC3 is an audio file specifically developed by Dolby Digital to provide surround sound audio. The format is used for audio on many DVD and Blu-Ray media. In order for the file to be correctly decoded and output, a DVD player with a Dolby Digital compatible home cinema system is required. It became the de facto standard for surround sound, and has held that position since its inception in 1992, with it coming to home cinema in 1995.
Technical Details AC3 allows for separate audio to be defined for each of the 6 speakers in the standard cinema and home cinema setup. This produces the effect of surround sound to the person listening to the audio file. The six channels consist of right front, center, left front, rear right, rear left and a sub woofer.
Associated programs
  • QuickTime Player
  • VLC Media Player
  • Windows Media Player
Developed by Dolby Digital
MIME type
  • audio/ac3
  • audio/vnd.dolby.dd-raw
  • audio/x-ac3
Useful links

AC3 Convert AC3 file

Using Zamzar it is possible to convert AC3 files to a variety of other formats

  • ac3 to aac (Advanced Audio Coding File)
  • ac3 to m4a (Compressed video file)
  • ac3 to m4r (iPhone Ringtone File)
  • ac3 to mp3 (Compressed audio file)
  • ac3 to ogg (Ogg Vorbis Compressed Audio File)
  • ac3 to wav (Windows audio file)
AC3 Converter Audio