No, I dont want to be able to talk as the animation runs. I know that CSS does this, but I dont need it. Because my character is only a face with reflection in it. So if I smile, all the face change. So all the face must be render for each viseme. So I must speak only at the end of an animation. So went I say enable speaking on each animation, it is not on each frame, but only at the end. And if this animation as a return animation, he continue to this animation afterward.
So basicly, the character stays in idle mode, make some eye blink. When a rule is fire, and there is a animaiton called, it runs the animation, talk with the appropriate viseme link to this aniamtion, then the return animation. Idle mode again.
I dont know if this answer your question