In a room there are some different chemical glass ampoules. The ampoules are filled with liquids of different nature and colors. Within each liquid there is a waterproof speaker. The played audio is digitally processed mixed with synthetic sounds, both organized in a composition. The composition is realized by exploiting the different sound propagation relative to the liquid in the whole of each ampoule and according to the wavelength ( frequency ) of the color inside the ampoule. The perceived timbre effect is therefore dictated by the different "composition" of the fluids which have the function of sound filters. A kind of alchemical composition, dialogue between contemporary composition and physical principles.