It’s circle pieces butted up against each other, and only looks like it’s connected because it’s pretty flat going through those points. But the rate of curvature changes really suddenly and drastically at those points… and does it the same way, at the zero crossing of ConsoleChannel, Density, PurestDrive, PurestWarm, Channel, and lots and lots of other plugins I’ve made. It’s part of the ‘fatter, smooth’ sound of some of my distortions. Seemingly really fat and analog-sounding, but there’s a discontinuity as you go through zero, which is why it makes the audio sound obviously different.