Re: What is hoplding you back?
Kiai comes from the hara. When you are "in the zone" you will hear it, but it will almost sound like it comes from someone else. It is then that you will feel less inclined to temper the volume, and just let it go. Much of what I've read about O'Sensei's kiai was that his was dynamic. I've heard that those who have heard him, say that the recordings commonly found today do not do it justice. He just let 'er rip, indoors or out.