I have a pansonic tv (av, 3 hdmi, and optical port) as well as a Philips hts 3051 blu-ray player w/ surround sound (hdmi, coaxial digital and av). I want to play my chrome cast through my tv, but have audio played through the surround sound. Before I buy an adapter for the coaxial to optical digital, is there anything I need to know, will this work or us there an easier/cheaper way? Thanks to all who help.