01627nas a2200145   4500008004100000245005200041210005000093260002000143300001500163520112200178100002101300700002701321700002601348856010701374       2008                        eng d00aA SIP spatial audio server for the EVE platform0 aSIP spatial audio server for the EVE platform  c22 - 25 January  a 395 - 4023 aWhen it comes to 3D Virtual Environments it is well known that 3D sound is of great importance to the whole interactive experience. The percept of sound is a major counterpart for the eyesight, since it describes the location, the momentum and the attitude towards the listener, of each surrounding entity. The sound can offer precision of spatial perception that cannot be achieved by the eye itself. Thus the support of 3D surround sound of high fidelity is mandatory for a 3D Virtual platform. The evolution of Internet telephony led to the introduction of new session establishment and management protocols. The most important of them, the Session Initiation Protocol (SIP), is a robust, lightweight reliable and fast application-layer control (signaling) protocol that is highly adopted for creating, modifying and terminating sessions. This protocol can be of extreme importance in establishing audio sessions for multi-user platforms. This paper presents the work done for developing a SIP 3D spatial audio server for a multi-user virtual environments platform, called EVE, in order to support 3D spatial audio1 aBouras, Christos1 aTsiatsos, Thrasivoulos1 aTriglianos, Vasileios  uhttp://telematics.upatras.gr/telematics/publications/sip-spatial-audio-server-eve-platform?language=en