Virtual Acoustic Spaces (VAS) is a lightweight C library for three-dimensional sound reproduction via headphones. It offers standard objects for dynamic binaural synthesis based on head-related transfer functions, delays for the simulation of reflections, and FIR filters for headphone equalization and reverberation. Moreover, the library implements a real-time audio synthesis based on binaural room impulse response datasets and a data reduction method for the corresponding room impulse responses. Depending on the number and timing of early reflections, binaural room synthesis becomes possible with reduced memory and processor usage, to be used in mobile augmented and virtual reality applications even on mid-range smartphones.
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