Ah, interesting. I was familiar with spherical harmonics for Ambisonics [1], a technology for representing the directional sound field at point (or perhaps a he

Ah, interesting. I was familiar with spherical harmonics for Ambisonics [1], a technology for representing the directional sound field at point (or perhaps a head-sized sphere), using the spherical harmonic decomposition to approximate the sound field in a reasonably small number of discrete channels. [1] http://en.wikipedia.org/wiki/Ambisonics http://en.wikipedia.org/wiki/Ambisonics