ISO X3D 4.0 Audio Graph for web3D applications. Latest trends in declarative 3d sound for the web

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Our work, as 3D Audio Working Group of Web3D Consortium, aims to integrate acoustic properties associated with geometric shapes together with 3D spatial sound and insert this new technology into the X3D v4.0 ISO standard. In this paper we present X3D 4.0 Audio Graph API as it is embedded with all the latest improvements and examples. Moreover, we introduce novel ideas and use cases on how X3D v4.0 may improve immersion experience in Metaverse games, theatre or music performances and concerts. In this paper we introduce new audio components of the X3D standard and we present a case study of a platform that enhances users’ experience in scenarios of live online performances, mainly theater or music concerts, by enriching the realism of the streamed audio through auralization and virtual specialization. Our strong point is that we manage to include all the necessary information inside the scene nodes and combine three technologies that serve different purposes to work harmonically together, allowing multiple people to stream and enjoy the performance as they would in a real theater. We achieve this goal by joining state of the art technologies that involves web3D, teleconferencing and sound. Thus we may encourage community to create new real time applications like virtual theatre or tele-orchestras.

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