there has been quite afew times were people sound "normal" when there is ment to be a feeling of them for being scared, for example . . .
Oblivion: one quest is to go into a locked house and slaughter all the quests..... kill of afew and people still have the same tone in their voice as when they first met you... now that to me is abit weird as they are ment to be scared.
so does any think / know if there will be multi-tones in voices in Skyrim..?