audio extracter, encoder, and converter
fre:ac is a free/open source audio extracter, encoder, and converter. You can use fre:ac to extract audio files from CDs, encode and reencode audio files to a lower bitrate, and convert audio files to and from various formats, including: MP3, Ogg Vorbis, MP4/AAC, FLAC, and more. Additional plugins are available as well.
For help with this app, please see the following: