OpenFormatDB

Sony OpenMG Audio

Writable

audio

Sony OpenMG Audio files, often used for Minidisc players. The file, though originally designed for ATRAC3 (Adaptive Transform Acoustic Coding) audio files, can have different audio codecs such as MP3, ATRAC, ATRAC3, Linear PCM and WAV. These files can have DRM (digital rights management) protection, OpenMG refereing to the DRM system developed by Sony for managing and protecting digital music data on a personal computer. The OpenMG files have extensions of .omg and .oma.

Identify it

Extensions.oma
MIME typesaudio/atrac-advanced-losslessapplication/octet-stream
Signatures
656133 at byte 0 (Sony Open MG Audio)
6f70656e4d47 at byte 8
454133 at byte 0
PRONOMfmt/2018
WikidataQ105853831

Not sure your file is this? Identify it from its first bytes, in your browser.

Open it

Convert it

ToWithFidelityCommand and losses
FLAC (Free Lossless Audio Codec) 1.2.1FFmpegLosslessffmpeg -i in.oma out.flac
Lossless for decoded audio; a lossy source stays as degraded as it was. WAV may reduce bit depth or drop metadata.
Waveform AudioFFmpegLosslessffmpeg -i in.oma out.wav
Lossless for decoded audio; a lossy source stays as degraded as it was. WAV may reduce bit depth or drop metadata.
Matroska 1-4FFmpegLossyffmpeg -i in.oma out.mkv
Re-encoded with lossy codecs by default; try `-c copy` to remux without re-encoding when the codecs fit the container.
MPEG 1/2 Audio Layer 3FFmpegLossyffmpeg -i in.oma out.mp3
Lossy re-encoding.
MPEG-4 Part 14FFmpegLossyffmpeg -i in.oma out.mp4
Re-encoded with lossy codecs by default; try `-c copy` to remux without re-encoding when the codecs fit the container.
OggFFmpegLossyffmpeg -i in.oma out.ogg
Lossy re-encoding.
WebMFFmpegLossyffmpeg -i in.oma out.webm
Re-encoded with lossy codecs by default; try `-c copy` to remux without re-encoding when the codecs fit the container.
0

Sources

From Converters (FFmpeg, ImageMagick, Pandoc, LibreOffice), PRONOM, Wikidata. Updated 2026-10-20.

Improve this record JSON