Analog audio inputs are not assignable. So whatever analog audio input you use, you must then assign the component video input to the same name. I told you the same thing 3 weeks ago in your other thread here .
For more information on your 1912, check out the first 6 posts of the Denon XX12 Owner's thread linked in my sig.
For more information on your 1912, check out the first 6 posts of the Denon XX12 Owner's thread linked in my sig.