The File Extensions Database

.AT3 File Extension

  • Developer by: Sony
  • Category: Audio Files
  • Format: Binary

What is an .AT3 file?

.AT3 is ATRAC3 Audio File

Audio file created with Sony's Adaptive Transform Acoustic Coding 3 (ATRAC3) compression algorithm; designed for storage and playback on portable media devices, including Sony CD and MP3 players, the PlayStation Portable (PSP), and Sony Ericsson mobile phones.

AT3 files may also be seen as .AA3 files, or as .OMG files, which contain Digital Rights Management (DRM) protection.

Programs that open ATRAC3 Audio File
Sony SonicStage
MAGIX Sound Forge Pro 11
MAGIX Vegas with ATRAC plugin

How to solve problems with AT3 files

  • Associate the AT3 file extension with the correct application. On :
    Windows: Right click on any AT3 file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.AT3 files". Mac: Right click (or Ctrl-click) the AT3 file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .AT3 is ATRAC3 Audio File. Because only the current version supports the latest AT3 file format. Search, therefore, e.g. on the Sony manufacturer website after an available .AT3 is ATRAC3 Audio File update.
  • To make sure that your AT3 file is not corrupted or virus-infected, get the file again and scan it with antivirus software.