[UPDATED!] Rendering “headlocked” stereo in 360 (without dedicated stereo tracks) and some surround sound history in the background.

Recently I was digging into the art of rendering ambisonics with loudspeakers (that was 8 loudspeakers in different regular arrangements – cube, octagon, bi-rectangle). During a break in my work I started playing some music from Spotify. Of course I wanted to play it trough all of the loudspeakers, but the simple virtual stereo sources…