Two formerly discarded brass instruments are suspended in separate transparent water tanks and exposed to opposite transformative chemical reactions; one progressively decaying, and the other being progressively restored throughout a period of three months. These processes are translated into an abstract brass soundscape that changes in parallel with the instruments using sensor and sound processing technology, thereby linking the physical transformation of the instruments to the acoustic realm for which they were created: a webcam senses the visual changes on the surface of the brass using Processing, while a Supercollider sound processor modifies bespoke samples of brass sounds based on the changes of sensor values through time.