We present a newly developed 3D Audio Playback Engine that has the capabilities to: (i) simultaneously spatialise over 40 audio sources based on sound trajectories; (ii) smoothly playback a fixed 3D soundtrack for 385 possible head-orientations (based on head-tracking data); (iii) switch smoothly between different fixed 3D soundtracks (i.e., different auditory worlds); (iv) playback up to eight simultaneous and instantaneous 3D sounds on command; (v) use a head-tracker interface via the virtual reality peripheral network (VRPN); (vi) employ a 3D audio communication interface using voice over IP between three participants; (vii) create a two-way communication protocol with the Virtools graphical software engine controlling the visual display.
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