Greetings Gang, Recording newb here, (even though I've been stuck trying to record and learn FL Studio for 3 years now). I needed more than 2 inputs into my DAW so I bought a 4 input USB unit, works great, really helped. Then I thought to connect my old 2 input usb interface at the same time. It never occurred to me to do that because I thought there would be hardware issues, I was wrong. So for all the recording newbs, you can run more than 1 USB interface at one time for multiple inputs with ASIO4all Now I have 6 . . . . .