When I first heard about this, I wasn’t too sure what it was about. 8D? Like 8 Dimensional? Like sleep ASMR video makers weren’t happy enough with 3D? Even 4D which is already pushing the physical boundaries of what we know? Anyway, it’s apparently a thing where you layer sounds in a certain way to give an impression of dimension. Supposedly, this also increases the effects of the triggers, making them a lot more effective than if they were created by themselves. The videos are… interesting to say the least. It’s a bit hard to explain. Give these a listen and let me know if they work for you.