You may have a concert DVD you want to rip the audio from so you can play it on your VortexBox. There is a good program called DVD Audio Extractor.
http://www.castudio.org/dvdaudioextractor/
This works well but it’s only for Windows and it costs money.
Here is how to do this with your VortexBox. It’s not as convenient as DVD audio extractor but it work.
From command line first stop the auto CD ripper
service vortexbox stop
next put in your DVD
mplayer -aid 128 dvd:// -vo null -ao pcm:fast:waveheader:file=soundtrack.wav
sox soundtrack.wav soundtrack.flac
Both of these commands will take a while to run but in the end you will have a FLAC of your DVD.