Higher Order Ambisonic classes for Stephen Travis Pope's 'CREATE Signal Library' (CSL), written with Jorge Castellanos and Graham Wakefield.
The source code for AmbiCSL is part of the latest CSL distribution, for example the source package of CSL v5.0. In the unzipped archive, you find the AmbiCSL code under 'CSL/CSL/Spatializers/Ambisonic'.
CSL is licensed under a 'Regents of the University of California' scheme. See the source package for details.