vorbis-tools contains an Ogg Vorbis command-line encoder, decoder/player and a tool for changing .ogg file comments. Ogg Vorbis is a audio encoding format; its technology is patent-free and players and encoders are available on a variety of operating systems. * oggenc encodes audio into the Ogg Vorbis format * ogg123 plays Ogg Vorbis files or URLs streamed via HTTP * vorbiscomment can list or set comments in an .ogg file