Tremor

You are the glottis; your hands are the vocal tract. Move your body and the camera reads it into a continuous, dissonance-capable voice — raise up for higher pitch, open wide to open the vowel, move fast to roughen it into a growl. The frontier makes bodies dance to sound; this runs the arrow the other way — sound from motion.

If you hear nothing, click anywhere once — browsers hold audio until you interact. Webcam frames are analysed in your browser only.