Re: Can the Optical cable be used to connect Roku streambar to my HD cable box?
Apparently @ ROKU has discontinued all devices that had Optical outputs. What you can do is search Amazon for an "HDMI Audio Extractor" with an optical TOSlink out or for a "HDMI Switch" which also has optical out. (With a switch you can hook up Roku and you DVD Player or Chrome or whatever other sources to one TV. The device will take the digital sound signal from the HDMI output of the ROKU and rout it to an optical connection for your sound bar - poof