He folds both hands around his staff, lacing his fingers together--a nervous gesture to keep further nervousness from spreading to the rest of him. "Trial and error at first, once I discovered a configuration that would make any noise at all. I assembled a library of modifications to the tone and pitch through my experimentation that let me fine-tune them once I had something I liked."

His first instinct when he hears Atticus move is to bolt; he squashes it ruthlessly, though his grip on the staff tightens. They can't reach him here.