HO-SIRR-GUI

A VST and standalone App implementation of the Higher-order Spatial Impulse Response Rendering (HO-SIRR) method [1,2]. Developed using JUCE and the Spatial_Audio_Framework.

HO-SIRR can synthesise output loudspeaker array room impulse responses (RIRs) using input spherical harmonic (Ambisonic/B-Format) RIRs of arbitrary order. The method makes assumptions regarding the composition of the sound-field and extracts spatial parameters over time, which allows it to map the input to the output in an adaptive and more informed manner; when compared to linear methods such as Ambisonics. The idea is that you then convolve a monophonic source with this loudspeaker array RIR, and it will be reproduced and exhibit all of the spatial characteristics of the captured space.

• [1] McCormack, L., Pulkki, V., Politis, A., Scheuregger, O. and Marschall, M. 2020. Higher-Order Spatial Impulse Response Rendering: Investigating the Perceived Effects of Spherical Order, Dedicated Diffuse Rendering, and Frequency Resolution. Journal of the Audio Engineering Society, 68(5), pp.338-354.
• [2] McCormack, L., Politis, A., Scheuregger, O., and Pulkki, V. 2019. Higher-order processing of spatial impulse responses. In Proceedings of the 23rd International Congress on Acoustics, 9--13 September 2019 in Aachen, Germany.

Pre-built plug-in and App

The plug-in and App may be downloaded from here [Mac OSX (10.10 or higher), Linux (x86_64), and Windows (64-bit)].

Building the plug-in and App yourself

First clone the repository (including submodules) with:

git clone --recursive https://github.com/leomccormack/HO-SIRR-GUI
# or if you have already cloned the repository, update with
git submodule update --init --recursive

Prerequisites

The VST2_SDK should be placed in the 'SDKs' folder like so:

SDKs/VST2_SDK

By default, MacOSX, Linux and Windows (x86_64/amd64) users need to install Intel oneAPI (MKL and IPP) and run the install-safmkl.sh/.bat and install-safipp.sh/.bat scripts found in SDKs/Spatial_Audio_Framework/scripts. Whereas, Raspberry Pi (ARM) users instead require OpenBLAS and LAPACKE libraries:

sudo apt-get install liblapack3 liblapack-dev libopenblas-base libopenblas-dev liblapacke-dev

Note, however, that alternative performance libraries may also be used, with more information provided here.

Linux (x86_64/amd64 and ARM) users must also install the following libraries required by JUCE:

sudo apt-get install x11proto-xinerama-dev libwebkit2gtk-4.0-dev libgtk-3-dev x11proto-xext-dev libcurl4-openssl-dev libasound2-dev

Building the plug-in via CMake

The plug-in and App may be built with CMake (version 3.15 or higher):

mkdir build
cmake -S . -B build
cd build
make

Or for Visual Studio users (using x64 Native Tools Command Prompt as administrator):

cmake -S . -B build -G "Visual Studio 15 Win64"
cd build
msbuild ALL_BUILD.vcxproj /p:Configuration=Release /m

Note: when installing CMake on Windows, make sure to allow the intaller to add CMake to the system PATH list or it won't be found.

Building the plug-in and App without CMake

You may also manually open the .jucer file with the Projucer App and click "Save Project". This will generate Visual Studio (2015/2017) solution files, Xcode project files, Linux Makefiles (amd64), and Raspberry Pi Linux Makefiles (ARM), which are placed in:

audio_plugin/_HOSIRR_/make/

To generate project files for other IDEs, you may open and configure the included .jucer files accordingly.

Contributors

• Leo McCormack - C/C++ programmer and algorithm design (contact: leo.mccormack(at)aalto.fi)
• Archontis Politis - algorithm design
• Ville Pulkki - algorithm design

License

This project is licensed under the GPLv3 License - see the LICENSE file for details