What is Ogg Vorbis?
Ogg is an alternative highly compressed lossy audio file format. Vorbis appears to be the company which invented it. Various Ogg encoders are available for download free of charge from the Vorbis web site. There are no Ogg players as such, but add-ins for other players are available, and most modern WAV/MP3 players also include the ability to play Ogg files. Technically, Ogg appears to be very similar to MP3. Judging by comments on the BladeEnc and Vorbis web sites, using Ogg encoders seems to be legally preferable to MP3 encoders because the Ogg algorithm has not been copyrighted. However, bear in mind that this comment only applies to the algorithms and the encoding programs, not to the material being encoded.