K.I.T.T 's voice was vocoded. I would imagine the post sound production team was coloring the dialog with a 'coder of some sort.A good example of what I'm talking about is the Knight Rider intro (I'm not allowed to post links, just YouTube "Knight Rider intro", first result). The dialogue has a very colorful sound to it. Although Knight Rider is an extreme example, everything produced back that seemed to have that quality, to an extent.