A huge object with a structure like a conveyor belt, operated by two people. It's placed on the stage with a piano, looks like a strange musical instrument. However, what unfolds here is a repetition of a very simple act: one person places a piece of wood on a belt, and the other person turns a handle to make the piece fall to the floor. What the audience sees is the act of "generating sound" itself, and the objects and their operators are theatrical metaphors for the instruments and performers. In 2016, they performed improvisation with two pianos in the "Hear with Your Eyes, See with Your Ears Improvisation Concert Vol. 2".