Audio settings?

Yes... just touch the audio system screen where it says "sound" and it will take you to the screen where you can set treble/mid-range/bass and left-right/front-rear balance:


You'd think the little icon of a speaker and the word "sound" would be obvious, but sometimes it's a little bit like trying to figure out ancient Egyptian hieroglyphics.

 

You can't do it from the presets page you need to actually select a preset and the page that gets displayed will have the Sound setting in the lower right corner.
I'm not in my car right not but if you don't see the Sound icon and there is a "back" button (not the back curved arrow thing) select that.
I've been where you are the Sound settings are hidden more than they should be.