How do I adjust treble and bass?
 

I have a 2015 base model with the standard 6.1" touch screen. I've read a lot of complaints about the stock sound system and I agree, it's kind of underwhelming.

I can't figure out how to adjust bass and treble. Is there a way to? I've never seen a system where you can't.

Well, I found out why I couldn't adjust these settings. I have been only using the bluetooth screen, not the AM/FM radio. Under the radio screen, there is a speaker icon, and when you touch this, you can adjust treble and bass, as well as fading front/rear, left/right.

This seems a little cumbersome to me. Does it remember my treble and bass settings when I'm on the bluetooth screen?

Also, is it just me, or does the sound system sound better when it's set to "tC"? The bass seems to have more oomph. Under "FR-S" there is noticeably less bass.