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Since I have acquired several RTL2832U sticks, I got to wondering if I could use multiple RTL2832U sticks at the same time with multiple instances of SDR Sharp or HDSDR. I hadn't seen it mentioned it anywhere, so I gave it a try. The answer is yes you can and its pretty cool. This opens the door for some additional interesting projects using the RTL2832U as an SDR. If you want to give it a go, here is an article explaining how to get it working.

Using Multiple RTL2832U Sticks for SDR | Ham Radio Science