In multimedia art and communication, sound models are needed which are versatile, responsive to users’ expectations, and have high audio quality. Moreover, model flexibility for human-machine interaction is a major issue. Models based on the physics of actual or virtual objects can meet all of these requirements, thus allowing the user to rely on high-level descriptions of the sounding entities. As long as the sound description is based on the physics of sounding objects and not only on the characteristics of human hearing, an integration with physics-based graphic models becomes possible.