Find out where this new audio content is going to come from.
I have a friend who's going to be strangled by me pretty soon if I can't find an answer to this.
He wants a fairly definitive answer as to whether Mplayer and/or Xine either can be made to out of the box or via some sort of 3rd party program, upmix audio. So say I have a video file with a stereo MP3 track in it. Is there some way to upmix that to say 5.1 or 6.1 audio assuming the hardware is all in place to handle it? It's understood that the upmixed audio won't be as good as true 5.1/6.1 audio, but simple mirroring of channels isn't really good enough for him.