Ambisonics/SPS Pages by Angelo Farina

Ambisonics is a multichannel audio technology, allowing for encoding, recording and reproduction of audio signals containing complete spatial information
SPS (Spatial PCM Sampling) is a modern alternative to Ambisonics, invented by Alberto Amendola and Angelo Farina

The following web pages are hosted on www.angelofarina.it, dealing with various aspects of Ambisonics and SPS technologies:

Audacity recompiled with 128ch export and ASIO support
Creating a video file containing 3rd order Ambix (for VLC Mediaplayer or Vive Cinema)
The new X-MCFX matrix convolver VST plugin
Headphones equalization using Aurora plugins
Applying denoising, compression, limiting, etc., to High Order Ambisonics recordings using SPS
Creating a video file for Youtube containing Ambix + Headlocked audio tracks
Video with explanation of SPS and its usage for auralization
Introducing SPS format and its first practical implementation, called Mach1
Explicit Formulas for High order Ambisonics (Ambix - ACN SN3D format up to 7th order)
Original Formulas for High order Ambisonics (MPEG-H - ACN N3D format up to 7th order)
Conversion between Ambisonics and TBE (Facebook Spatial Workstation)
X-volver is a matrix convolution VST plugin for WIN32 and MAC-OSX
Conversion between UHJ and Ambix using X-volver (UHJ decoding) - NEW version
Conversion between Ambix and UHJ using X-volver (UHJ encoding) - NEW version
Conversion between A-format and B-format using X-volver - NEW version
Conversion between Ambisonics and TBE (Facebook Spatial Workstation) - OLD version
Conversion between UHJ and B-format (UHJ decoding) - OLD version
Conversion between B-format and UHJ (UHJ encoding) - OLD version
Conversion between A-format and B-format - OLD version
Performance analysis of three 2nd-order Ambisonics decoders over an ITU 5.1 surround sound system.
Bass Management new freeware, open-source VST plugin
An example B-format recording, and stereo downmix for MP3 delivery
The new Casa del Suono research facility is open!
List of papers related to the Ambisonics technology authored by Angelo Farina
List of papers related to SPS technology authored by Angelo Farina
Disable the failed discrete graphics chip on an old Unibody Macbook Pro

Several Ambisonics-related resources are available on this web site:

Software for B-format processing

B-format recordings (also binaural, for comparison)

Patent and paper by Michael Gerzon describing the functionality of the Soundfield (TM) microphone

Patent and paper by Michael Gerzon and Geoff Barton describing advanced decoders for irregular 5.0 layouts.

Reports about tests on Soundfield microphones and B&K probes

Firmware for transforming a BSS Soundweb DSP unit in an 8-channels Ambisonics decoder.

Web Links

Sparta suite of plugins by Leo McCormack University of Aaalto

Ambix suite of plugins by Mathias Kronlachner

Ambisonic Studio plugins by Daniel Courville

O3A Core free plugins by Richard Furse

IEM Plugin Suite at Graz University

Ambisonic Bootlegs - huge collection of B-format recordings and Ambisonics-related articles

www.ambisonic.net - the historical repository of Ambisonics

www.acoustics.net - the Waves project about collecting B-format impulse responses of all the theatres of the world

York's University Ambisonics web site - free VST plugins and a lot of infos on Ambisonics

Aristotel Digenis web site - free 3rd-order Ambisonics decoder, & more!

Bruce Wiggins' web site at the University of Derby - free VST and Direct-X Ambisonics decoder

Jerome Daniel web site at France Telecom - high-order Ambisonics plugins and microphone arrays

www.gerzonic.net - professional VST plugins for Ambisonics processing (freeware and commercial)

Robert Green's REGONAUDIO web site - a lot of articles about various audio technologies, including surround

Visual Virtual Microphone by David McGriffy - powerful software (standalone and VST) for processing 1st-order B.format files

Ambisonics page on wikipedia