With AimOne Audio Converter you can easily extract and convert audio from almost any kind of audio and video file types to MP3 / WAV output in batch mode. It offers a built-in-player to view or listen to the file before extracting the sound, which allows you to set the start / end points of the portion you want to extract and convert. Supports AVI, VCD, DVD, MPEG, WMV, WMA, DAT, ac3, RM and other formats.
AimOne Audio Converter starts from $29.95. AimOne Audio Converter has also desktop App available.