The “.OMA” file extension is associated with Sony’s OpenMG (Open Management Group) Audio file format. OpenMG is a proprietary digital rights management (DRM) system used by Sony to protect audio content, typically found in ATRAC3 (Adaptive Transform Acoustic Coding 3) format. ATRAC3 is a compression technology developed by Sony for audio encoding.

How to open an OMA file:

To open and play an OMA file, you generally need a media player or software that supports the OpenMG Audio format. Here are the steps:

1. Sony SonicStage:

2. Convert to MP3 or Another Format:

Programs that may open OMA files:

1. Sony SonicStage:

Various apps that use files with OMA extension: