"Exploratio Invisibilis" was one of my early 3D ambisonics pieces, created using ambisonic technologies that are now part of history. In 2002, one of the only ways to synthesize ambisonics beyond first order was through an offline (non-real-time) scripting software called Vspace, developed by Richard Furse, who later founded Blue Ripple Audio. This software enabled second-order HOA synthesis and an ambisonically calculated shoebox room model. At the time, there were no convenient VST plugins or user-friendly GUIs like we have today—just pages upon pages of text commands to control spatial syn...