As an animated character shadow boxes, a computer synthesizes the sounds made by a nylon windbreaker.
Someday, virtual reality may be so well done that you won't be able to tell it's just computer animation. To make that happen we'll have to hear it as well as see it, from dramatic noises like the sound of a breaking glass to subtle details like the rustling of clothing as characters move. Cornell researchers who specialize in creating sound for computer animation are adding the sounds of cloth to their repertoire. Doug James and Steve Marschner, associate professors of computer science, and graduate student Steven An reported their method of synthesizing cloth sounds at the SIGGRAPH conference Aug. 7 in Los Angeles. Soundtracks for animated movies are still mostly constructed by hand, manually matching recorded sounds to the action. But it's not always possible to find appropriate sounds, and in interactive virtual environments you won't always know ahead of time what the action will be.
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