Spatial_Audio_Framework

A Spatial Audio Framework (SAF) written in C. The framework includes functions for Vector-Base Amplitude Panning (VBAP), Spherical Harmonic Transforms (SHT), Higher-order Ambisonics (HOA) etc.

Getting Started

To include this framework in a project, simply add the following code

Spatial_Audio_Framework/framework

And add

Spatial_Audio_Framework/framework/include

To the header search paths.

Windows users must also install Intel's MKL, which can be freely acquired from

Intel MKL

Examples

Several examples have also been included

Spatial_Audio_Framework/examples/ambi_dec
Spatial_Audio_Framework/examples/ambi_enc
Spatial_Audio_Framework/examples/array2sh
Spatial_Audio_Framework/examples/binauraliser
Spatial_Audio_Framework/examples/panner
Spatial_Audio_Framework/examples/powermap
Spatial_Audio_Framework/examples/rotator
Spatial_Audio_Framework/examples/sldoa
Spatial_Audio_Framework/examples/upmix

ambi_dec - a frequency-dependent Ambisonic decoder (AllRAD, EPAD, MMD etc)
ambi_enc - a simple Ambisonic encoder/panner
array2sh - converts microphone array signals into spherical harmonic signals (aka HOA signals)
binauraliser - convolves input audio with interpolated HRTFs, which can be optionally loaded from a SOFA file
panner - a frequency-dependent VBAP panner
powermap - sound-field visualiser using beamformers (PWD, MVDR) or sub-space methods (MUSIC)
rotator - rotates spherical harmonic signals (HOA signals) given yaw-pitch-roll angles
sldoa - spatially-localised direction of arrival estimator
upmix - a (soon to be) collection of upmixing algorithms (currently only stereo to 5.x upmixing)

GUI implementations

Many of these examples have been intergrated into VST audio plug-ins using the JUCE framework and can be found here: http://research.spa.aalto.fi/projects/sparta_vsts/

Authors

Leo McCormack - C programmer and DSP researcher (contact: leo.mccormack@aalto.fi)
Symeon Delikaris-Manias - DSP researcher
Archontis Politis - DSP researcher

License