There are plenty of freeware programs that will extract the Audio from a specific .vob or the whole movie .
I don't think they would seperate the narration without it's background audio.
I'm guessing you are wanting the director's comments.
I use BeSweet with BeLight GUI . You need to add the VOBInput.dll for BeSweet to the BeSweet folder. So it will handle .vob files.
If you have the disc or an .iso in a virtual drive DVDDecrypter can extract the audio.
AutoGordianKnot can also do this.
Format Factory can do this in a couple of ways. If you have already ripped the movie to your harddrive decrypted just select the .vob with the narration. If you have AnyDVD you can rip it directly from the DVD disc.
If what you were wanting was only the narration without any other background noise (only the narrator's voice).Was DVD Audio Ripper able to do that ?
By asking the last question I in no way encourage downloading commercial products through torrents. Maybe Jim knows & got his legally. Or anyone that knows .
@Kerry56 , Maybe you could answer if sepahunt can answer my last question. I don't want to violate the forum rules & that might come close.