audio extracter, encoder, and converter
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fre:ac Portable can run from a cloud folder, external drive, or local folder without installing into Windows. It's even better with the PortableApps.com Platform for easy installs and automatic updates.
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.