An Alternative Implementation of Vbap with Graphical Interface for Sound Motion Design

An implementation of vector-based amplitude panning (VBAP) for spatial display of sonified data is presented. The proposed method offers an implicit conversion from Spherical to Cartesian coordinates thus being particularly well suited for auditory display. Two techniques from computer graphics are adapted in order to predefine an optimum set of speaker triplets and perform the amplitude panning in real-time. Furthermore, the consideration of time delay from a virtual sound source to actual speakers is incorporated. Due to the geometrical nature of this procedure, the resulting system can be easily visualized by the graphic library OpenGL. Using this library I provide users with an intuitive control interface. A prototype is demonstrated that enables a user to compose a trajectory of sound in three dimensional space.