Sonitum Horarium is a sound installation that uses all kinds of sand as a sound source. Sand flows from hourglasses through taps and pipettes into dishes and then into bowls on the ground. A mechanical system of chains and spoons transport the sand from the ground into large hourglasses. Microphones amplify the clicks of the apparatus and the rustle of the sand into musical worlds. The row of hourglass machines seems to be counting time. The ‘sand organ’ regulates the sound stream, in a world that is slowly but surely changing. Different types of sand from different places and deserts in the world were collected for this installation. Sand from Namibia, Mongolia, Libya, Burkina Faso, Haïti, India, Australia, Maroc, Mexico, Viagra France, ... Each sand has it’s own typical sound because of it’s texture and grain.