Identification

• Before it was discontinued in 2008, the Sony Connect Music Store allowed customers to buy legal copies of music to burn on CDs or play on MP3 players. The OMA extension indicated a Sony OpenMG music file.
  
  

Location

• You are most likely to find an OMA file in your "Music" or "Downloads" folder or in the default location you selected to save files downloaded from the Sony Connect Music Store.
  
  

Function

• An OMA file contains a song downloaded from the Sony Connect Music Store.
  
  

Features

• OMA files are saved with Adaptive Transform Acoustic Coding, an audio compression format proprietary to Sony.
  
  

Considerations

• OMA files often have special encryption to keep them from being played on computers that are not authorized with your Sony Connect Music Store account username and password. This encryption is meant to cut down on music piracy.