Thanks to everyone who helped the OP on this post I was finally able to get my 4 piezo controller working. I never would have thought to use an array. My original code was very complex and filled with unnecessary bits which were removed. I had a variable for each sensor but when I ran the code, all I would see is the first piezo input while the others were completely ignored as it looped. The array now displays each sensor on a 0-3 format followed by the threshold value and whether it is Hard or Soft. Now all I need to worry about is debouncing and getting more control over the tresholds specifically based on min and max values. It would be nice to name the analog inputs in the array so I'll need to do some research about that as well. Again, thanks everyone. You've all been extremely helpful. 