fre:ac is a free audio converter and CD extractor. Besides extracting audio from compact discs (with various features including HTOA), fre:ac can also convert audio files from one format to another or to the same format but a lower bitrate. fre:ac is compatible with many audio formats such as Ogg Vorbis, FLAC, MP3, MP4/M4A, AAC, WAV, WMA and more. fre:ac uses the CDex library to convert from CDs and uses freedb to retrieve artist/song information from the internet which is written to the files as various types of ID3 tags; this library supports cdparanoia which aims to improve audio quality. The user interface is multilingual with 43 languages and is able to be a portable install on a USB drive.