There are many audio formats that can be used for storing music, audio books, lectures, and other recordings in digital. Quite often there is a need to convert audio from one format to another. For example, your portable recorder produces sound as WAV, and you want it in MP3. Or you get some album in APE and intend to reduce file size greatly by converting APE to OGG Vorbis. Yet another possibility arises if you want to rip your Audio CDs in order to transfer your favorite music to a portable player.