The better the compression and quality of the encoding, the longer it will take.
The vorbiscomment tool is used for tagging Ogg Vorbis files, and is included in iRecordMusic.
If you have installed the free Ogg Vorbis QuickTime Component, you can listen to Ogg Vorbis recordings in iTunes and QuickTime. the section called “System Requirements”. Without this component installed, it is not possible to add Ogg Vorbis recordings to an iTunes playlist, as iTunes will not recognise the file.