The Powers Sensor Chair gives visitors a special glimpse into Tod Machover�s robotic opera "Death and the Powers," by providing a new way to explore the sonic world of the opera. A solo participant sitting in a chair discovers that when she moves her hands and arms, the air in front of her becomes an instrument. With a small, delicate gesture, a sharp and energetic thrust of her hand, or a smooth caress of the space around her, she can use her expressive movement and gesture to play with and sculpt a rich sound environment drawn from the opera, including vocal outbursts and murmurs and the sounds of the show�s special Hyperinstruments. This installation explores the body as a subtle and powerful instrument, providing continuous control of continuous expression, and incorporates alum Elena Jessop�s high-level analysis frameworks for recognition and extension of expressive movement.