.oga
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The oga file-format (previously .ogg[1]) is the free lossy audio format. The format is free. Tools for it are mostly GNU GPL and BSD.
.flac is the file format for lossless audio storage.
[edit] References
- ↑ Changed default extension for Ogg FLAC from .ogg to .oga, according to new Xiph specification (SF #1762492).