Glass Marble

The bouncing marble is one of the simplest and yet most representative examples of the possibilities offered by physically-based model synthesis. This model is composed of an elementary resonator (a mobile mass (1) attached to a fixed point (2) with a friction spring (3)),  a striker (unattached mass (4) subject to a constant force representing gravity (5)) and a non-linear link (6), a visco-elastic contact which becomes active when the two masses touch each other. The resulting sound comes from the successive positions of the resonator and shows only one frequency determined by the mass of the resonator and the visco-elastic parameters of the spring and friction system. This kind of simulation is very simple to achieve with physically-based models and can give spectacular results which would be nearly impossible to obtain with signal-model based synthesis. In this example, very simple causes can have extremely complex consequences

Length : 6 sec. Frequency : 44.1kHz Output : mono Size : 527Kb

© ACROE 93 - Authors : Eric Incerti, Claude Cadoz - Software : CORDIS-ANIMA