libvorbis: libvorbis-1.0
libvorbis: 
libvorbis: Vorbis is a general purpose audio and music encoding format
libvorbis: contemporary to MPEG-4's AAC and TwinVQ, the next generation beyond
libvorbis: MPEG audio layer 3. Unlike the MPEG sponsored formats (and other
libvorbis: proprietary formats such as RealAudio G2 and Windows' flavor of the
libvorbis: month), the Vorbis CODEC specification belongs to the public domain.
libvorbis: All the technical details are published and documented, and any
libvorbis: software entity may make full use of the format without royalty or
libvorbis: patent concerns.
libvorbis: