2 USB Headsets to 1 PC

I have been trying to figure out how to allow two USB headsets to work on one computer. The two headsets I have tried this with the G35 and the Logitech H390. I have tried all sorts of stuff like a virtual audio cable and audio repeater, but doesn’t seem to work. The only thing I have left to try is a USB Y-Splitter, but my father says that won’t work. I need anybodies help on this one.

Your father is right, a USB Y splitter won't work. Try enabling stereo mix.