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A Simple Acoustic Room Model for Virtual Production

The use of television virtual production is becoming commonplace. This paper describes the principles of a simple, experimental audio system, developed to accompany a video virtual production system. The acoustic model included the direct sound, six first-order room boundary reflections, reverberation, source directivity, air and surface absorption and obstruction or reflection of the direct sound by one internal, flat object within the room, with diffraction effects around the obstacle. The paper describes the topological arrangement of dsp modules, the models used to implement delay, reverberation and filtering and discusses some of the frequency-domain approximations used.

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