My brother left his HT package for me and I cant understand why a Coaxial to Optical Digital Audio Converter is required for the audio to work. HDMI transmits audio and video right? The receiver I have is Marantz SR3053 (link - http://www.marantz.asia/sg/Products...eTheatre&SubCatId=AVReceiver&ProductId=SR3053) and the device which is unable to output via HDMI is my WDTV. When the WDTV is connected to my regular TV audio video both work without a problem. Similarly Chromecast has no problem with my TV but when connected to a HDMI port on the receiver, I get only video and no audio. Any inputs would be of great help. Thanks!