The Vorbis General Audio Compression Codec (Decoder library)

 Ogg Vorbis is a fully open, non-proprietary, patent-and-royalty-free,
 general-purpose compressed audio format for audio and music at fixed
 and variable bitrates from 16 to 128 kbps/channel.
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 The Vorbis library is the primary Ogg Vorbis library.