For a Windows PC (sorry, I’m not really familiar with mac) it would be nice if the input sent to the Windows PC audio(non-ASIO) was selectable. On the URxxxC it just sends channel 1 and 2 and this cannot be changed. My old RME Fireface 800 allowed you select any input as a Windows input source and that is 15 years old. I guess it is a fuction of the Yamaha USB driver, I hope we see a bit more flexibility at some time.