best way to convert hdmi out to coax or optical for pre amp input

I am trying to output the oppo into the DAC of my Parasound P5.  Yes, it says in the Oppo manual that basically, you need the hdmi out hooked up to activate the digital audio outputs (coax and optical).  I am trying to play blu-ray audio...I am now thinking of hooking up an inexpensive monitor w/o speakers and running the optical or coax to the Parasound. I was hoping to do it without hooking up a monitor.  I would prefer not have to convert digital to rca analog and would rather go from the digital output of the oppo to the dac in the parasound.

thanks...well, I may just put in a small monitor to start with and see how the output is without any converters