I appreciate all the comments from the forum members!
It appears that I have been able to solve the USB ground loop noise issue. I was going out off my Fast Track Pro to the Boss 1600 with unbalanced cables with 1/4 inch jacks. I ordered two patch cables from Amazon with balanced TRS 1/4 inch jacks on one end and balanced male XLR jacks on the other end. I'm now running from the balanced outputs on the Fast Track to the balanced XLR inputs on the 1600 and there is absolutely no noise!
This might be a good thing for other forum members to keep in mind when faced with USB ground loop noise. The two cables from Amazon were less than twenty dollars, received in two days and completely solved the noise issue!

Thanks again, I was able to identify the USB ground loop issue with input from forum members. Special thanks to jcland for the link!

KnightSounds