What does "Equalize" do in Stitch?

SSIA, just want to know what the equalize function does in Stitch? There is an ‘auto’ button and a ‘reset’ button. I don’t seem to se any differences when I play with it.

I’ve been curious about this too. Thought someone might have an answer.

My best guess is it’s a IMS5 and previous system button that is not needed for the Planix?

But it’s fun to play with every now and again and realize it does nothing.