A single factory in Ohio is responsible for production of the steel frames that support Steinway pianos. There, in the wee hours, when electricity demand is down, two men move through a vast, darkened landscape of burnished metal, blinding sparks, and molten ore. Alone but for each other, they work in tandem, stoking immense furnaces and pouring red-hot liquid into molds that will cool to become the sturdy base. This hypnotic juxtaposition of solid and melted states of matter underscores a primal dance between man and machine.  ST