Summary: I bought this item from an eBay seller years ago. I'm an audio nut, but I don't have a lot of money for hardware. The other person's review about not being able to assign digital inputs/outputs without the remote is NOT TRUE. The there are three black buttons in the dead center of the front panel. Two are directional arrows and the middle one is "select." These are the key. The process is described in the owner's manual.