TEMPO.RAL is the architecture of frequency - a rain wall system that responds to the frequency of sound, simulating a stroboscopic condition through audiovisual senses. The system collects water from its base, pumping it into a carefully calibrated network of tubes that would transfer the frequency of sound from subwoofers into falling water, translating the sound into the visual of droplets. The changes in sound frequency are audible to the human ear, the variations of water flow frequency are only visible with a mechanical eye, thus creating a spatial condition that is only made visible by a camera. By adjusting the sound frequency to the rate of frames per second, the droplets can be made to appear moving slowly downwards, gradually ascending upwards or standing still in mid-air in defiance of gravity. The space here is at once physical and acoustical: a physical space defined by the visual and material quality of water, and an acoustical space augmented by the humming sound and vibration of the machine. The experience here lies in the interplay between the visual and the acoustical, the erosion of water by sound, and the variance between reality and its representation.