Embedded above is a video of my ofxAddons combo in action. The program finds a face using ofxFaceTracker and scales the face according to the loudest frequency found using ofxFft. I adjusted a threshold according to my very limited vocal range so that when the fundamental frequency of my voice was lower than 310 Hz my face would expand, and when above that frequency, my face would shrink. There is also a volume threshold so that only loud noises picked up by the microphone scale the face detected. It was a silly exercise mainly executed by editing code in one of the ofxFaceTracker examples and adding in the ofxFft to analyze the microphone input.