The main problem is that with the current version of dvdnav the only thing that ```get_audio_info``` returns correctly is the language code, at least with any dvd I tested. The second thing was that this code fragment belonged to GetAudioStreamLanguage, I therefore removed it and then simply forgot to re-add it to GetAudioStreamName or rather search for an alternative to get this info.

I will adapt these commits after the new version of dvdnav got merged.