How to extract audio from a VOB file in Linux
A VOB (Video Object) file is a container for audio, video, subtitles and other content, normally used in DVDs. Here are two of the many possible ways to extract a song or other segment of audio from a VOB file and put it on a CD in MP3 format.
Manual, GUI procedure: you can use Avidemux to view the DVD and manually save as a file only the video segment containing the desired audio.