Here are a few more questions about the "Aux Info" screen...

In my first post in this thread, I didn't post that I wanted to know more about the aux info screen since I was sure I'd be able to answer my questions by searching the BBS or the FAQ. However, I can't find any information anywhere. If someone can point me to where these questions are already answered, I'll humbly apologize.

So, on to the questions:

What the heck are these things on the "Aux Info" screen? The thing with the two vertical bars is measuring the volume of the incoming sound, right? So, what's that thing that looks like the radio signal strength meter? And (the real confusing part), what's that thing on the middle-left bottom that has that short vertical line that just jumps randomly from side to side for no discernable reason?

Does everyone know and they're just keeping it a secret from me?