Second Query: I am at a loss to find a voice changer, that I can route from a small (but quality) microphone to am amplified personal PA system. There are many novelty voice changers for halloween and such. But none of them are loud, or clear enough to be used in crowded or wide open spaces if being used with a mask that covers my face and muffles the sound of my voice. Any advice? hiltonwalls at gmail com.