neither the Edge nor the Oppo will require any display to even be connected or be on (if connected) to work 100% perfectly no matter the source at anytime

if they did I wouldn't offer it for sale as that would not be usable to folks

the Edge is going to use the Gefen to make sure it work 100% of the time, the only reason it will work like it does is because of the dedicated audio HDMI output, otherwise this thing would be a waste of peoples time, however because of that we have a very stable and amazing product in the Edge with this SPDIF mod

I was just using it to listen to some 6 channel 96KHZ stuff with nothing connected to the HDMI video output grin

thanks

-Gary Murrell
http://www.custom-ht.com/oppopowerbuy.html
My Personal HT setup