improve & design gui

First of all, the sample image of the UI looks like total trash. Why helping you if you dream of manufacturing trash?
—SA

OK, here is what I mean: in programmer's of hardware controls, there is one common sickness: making "beautiful" (in fact ugly) complicated controls mimicking analog devices. But this is not what customers wants. Digital output (but not input) is way more convenient, more readable. People won't need your analog-looking scales. And they look ugly, not even anti-aliased...
—SA