Sorry if this is a stupid question but I just can't find any information on this in the forums or even in the Studio One 3.5 user manual. I'm using Studio One 3.5 Pro with the Studio 2/6 USB interface. When I click on audio I/O, I see my the interface's Mic/Instr inputs on the patch grid, but I also see "Virtual In 1" and "Virtual In 2", both of which are inactive. Does anyone know what these are??