Hi all from a newbie :) Is there anyone out there who can advise on how to get Chromecast to play through a Philips 5.1 surround system? Current set up is - Sky box - via HDMI 1 Philips Surround player - via AV1 Chromecast - via HDMI 2 Chromecast currently works only through the tv speakers. After research, I figure an HDMI Audio Extractor may be the solution. The only optical out on any of my equipment is on the SKY+ box and the only current free port on the Philips player is an HDMI OUT. Any suggestions as to how to set this up would be most welcome. Thanks!