This process is covered in great detail in the EZbus Tutorial manual that was packed with your unit. Please see Tutorial 1: Using the EZbus as a Computer Audio Interface, pages 31 - 55, for step-by-step instructions. The tutorial provides everything you need to know about setting up the EZbus for use with your computer, from the basics of connecting your sound system, to audio routing to assigning the EZbus within your DAW software, to naming and saving your EZbus mixes. And when you're done with Tutorial 1, we suggest that you work your way through Tutorials 2 and 3 as well. You'll be amazed by how much you'll learn!