This is a new issue, not one I've ever seen before. I just learned all three words of Soul Tear from Durnehviir in Dawnguard and unlocked them, no problem. When I use the full Shout, though, my character only says the first "Rii" and then mutes out. I still get the full damage of the three words, and the full animation plays, but the voice cuts out. If I do just the first two, it works, he says "Rii Vaaz".

Any idea what might be causing this? Has never happened before, haven't downloaded any mods in quite a while, except an armor mod about a week or two ago, and I can't imagine that would cause a conflict like this.