hardware/software architecture. The real time Virtual Reality environment of the VEP project integrates a visual render, a custom application in C++ that uses the 3D-graphics libraries of the open-source Object-Oriented Graphics Rendering Engine (OGRE) under Linux or Windows, and a binaural render of the music, a custom application within SuperCollider under Linux; events are scheduled by the main engine (in Java), reading the visual and aural control scores; user orientation is tracked through the input devices and handled by the navigation engine.