If you spend a lot of time on YouTube, you may have seen something called 8D Audio showing up in the Up Next column or in your recommended videos. 8D? As in eight-dimensional audio? Yes, it’s a thing.

This post is part of Hard Refresh, a soothing weekly column where we try to cleanse your brain of whatever terrible thing you just witnessed on Twitter. You've heard of 3D, and even 4D, but prepare ...