I remember reading on here that the Onkyo 600 has an automatic audio switching thing. If you have both digital and analog plugged in it will switch to the digital side automatically if it senses a digital signal coming in. I tried this out and its true. HOWEVER It only does it for the Optical digital in, it does not do it for the Coax Digital in. Is it supposed to work this way? If so, why can it also have the automatic switching with the coax as well?