Yeah, I figured it would come down to ear fatigue and specific frequencies being the cause, if not volume.

I bet you’re totally right.

I’ve tried using “AI” based plugins for mixing/mastering audio and songs. It can be really hit or miss with the quality of its results, so it’s nothing to lean on too heavily, but it’s great for using as a jumping off point or for giving you something to replicate yourself (mix wise) with other plugins and improve on with your own knowledge.

It’s got a ways to go in the mixing/mastering area, but it’s already leaps and bounds better than just 3-4 years ago.