Free online AT3 to OGG converter

Source format: AT3

AT3 is an audio file format associated with Sony ATRAC3 compression. It is commonly found in PlayStation Portable (PSP) game assets, handheld console audio, and other Sony-related media files. AT3 is typically used to store compressed speech, music, or sound effects in a relatively small file size, making it useful where storage space matters.

Target format: OGG

OGG is a container format most often used with Vorbis or Opus audio. It is widely supported by media players, editors, and game tools. Compared with many legacy game audio formats, OGG is easier to play, edit, and share, and it offers good quality at efficient bitrates. It is a common choice for open, compressed audio distribution.

How to perform the conversion

The most reliable way to convert AT3 to OGG is to use a desktop audio tool that can decode ATRAC3 and re-encode to OGG, such as FFmpeg or Audacity with the right import support.

Using FFmpeg

1. Install FFmpeg on your computer.
2. Open a terminal or command prompt in the folder containing the AT3 file.
3. Run a command such as ffmpeg -i input.at3 output.ogg.
4. Check the resulting OGG file in a media player to confirm it plays correctly.

If the AT3 file uses an unusual extension or is embedded in a game archive, you may need to extract it first and rename it to .at3 if necessary before conversion.

Using Audacity

1. Open Audacity.
2. Use File → Import → Audio to load the AT3 file if your system supports it.
3. After the audio appears in the project, choose File → Export → Export as OGG.
4. Select the desired quality settings and save the file.

You can also convert the file on 101convert.com for free, without installing any software.

Notes on quality and limitations

AT3 is already a lossy format, so converting it to OGG will not restore lost audio detail. The result will depend on the original AT3 quality and the OGG bitrate you choose. For best results, use a moderate or high OGG quality setting to avoid adding unnecessary extra compression.

Some AT3 files may contain metadata or loop information used by games, and that information is usually not preserved in a simple audio conversion to OGG. Also, if the source file is protected, corrupted, or stored in a proprietary container, conversion may fail until the file is properly extracted.

For playback compatibility, OGG is broadly supported on desktop systems and many game engines, but some devices and apps prefer MP3 or WAV. If your goal is editing rather than distribution, consider keeping a copy of the original AT3 file as a backup.