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Conference Paper

Retargetting Example Sounds to Interactive Physics-driven Animations

Authors: Picard, Cécile; Tsingos, Nicolas; Faure, Francois

AES Conference: 35th International Conference: Audio for Games · Paper 25 · February 2009

Abstract

This paper proposes a new method to generate audio in the context of interactive animations driven by a physics engine. Our approach aims at bridging the gap between direct playback of audio recordings and physically-based synthesis by retargetting audio grains extracted from the recordings according to the output of a physics engine. In an off-line analysis task, we automatically segment audio recordings into atomic grains. The segmentation depends on the type of contact event and we distinguished between impulsive events, i.e. impacts or breaking sounds, and continuous events, i.e. rolling or sliding sounds. We segment recordings

of continuous events into sinusoidal and transient components, which we encode separately. A technique similar to matching pursuit is used to represent each original recording as a compact series of audio grains. During interactive animations, the grains are triggered individually or in sequence according to parameters reported from the physics engine and/or user-defined procedures. A first application is simply to reduce the size of the original audio assets. Above all, our technique allows for synthesizing non-repetitive sounding events and provides extended authoring capabilities.

Details

Published in
AES Conference: 35th International Conference: Audio for Games
Paper number
25
Publication date
February 6, 2009
Session subject
Audio for Games: Retargeting Example Sounds to Interactive Physics-Driven Animations
Affiliation
INRIA Sophia-Antipolis, Sophia-Antipolis, France; INRIA Rhone-Alpes, Grenoble, France, Université de Grenoble and CNRS, Grenoble, France (See document for exact affiliation information.)
Type
Conference Paper