The Sound-O-Matic system was originally developed for use in the Greenhouses at the Botanical Garden in Aarhus, where more than 100 loudspeakers are placed in the beds and plants – adding to the authenticity of the experience. The sounds are played in real time, so the experience varies. A flock of birds are put to flight with wings beating through the tropical rainforest. The direction in which they fly varies based on random algorithms in the Sound-O-Matic system, so the flock never sounds exactly the same as last time and never takes the same route through the rainforest.