Download Spherical Decomposition of Arbitrary Scattering Geometries for Virtual Acoustic Environments A method is proposed to encode the acoustic scattering of objects for virtual acoustic applications through a multiple-input and
multiple-output framework. The scattering is encoded as a matrix in the spherical harmonic domain, and can be re-used and
manipulated (rotated, scaled and translated) to synthesize various
sound scenes. The proposed method is applied and validated using
Boundary Element Method simulations which shows accurate results between references and synthesis. The method is compatible
with existing frameworks such as Ambisonics and image source
methods.
Download Parametric Spatial Audio Effects Based on the Multi-Directional Decomposition of Ambisonic Sound Scenes Decomposing a sound-field into its individual components and respective parameters can represent a convenient first-step towards
offering the user an intuitive means of controlling spatial audio
effects and sound-field modification tools. The majority of such
tools available today, however, are instead limited to linear combinations of signals or employ a basic single-source parametric
model. Therefore, the purpose of this paper is to present a parametric framework, which seeks to overcome these limitations by first
dividing the sound-field into its multi-source and ambient components based on estimated spatial parameters. It is then demonstrated that by manipulating the spatial parameters prior to reproducing the scene, a number of sound-field modification and spatial
audio effects may be realised; including: directional warping, listener translation, sound source tracking, spatial editing workflows
and spatial side-chaining. Many of the effects described have also
been implemented as real-time audio plug-ins, in order to demonstrate how a user may interact with such tools in practice.