Got sick of listening to spoken content on YouTube with wildly varying levels between videos. This thing is hell on wheels.

I started with 'Medium' and settled on:

-30,30,10,0.001,0.275,0

I noticed it seemed to introduce some peaking while enabled, but dropping the volume on the YouTube player to ~95% took care of it.

I don't use it for e.g. music playback, so I can't speak to that.