I have a setup witha 60" Sharp Aquos TV, a Boston Acoustic Soundbar (optical), a Tivo Roamio and a Roku 3, both HDMI. Everything was working fine on Roku apps like Amazon, History, Plex and PBS until I tried playing a Hulu Plus TV episode. No sound at all. After trying a few things I found the Audio setting on the Roku 3 and changed it to stereo. That solved it -sort of. The sound was coming through in "slow motion" and sounded a lot like a growling lion - the dog was on full alert and growling back! I tried rebooting the Roku - no joy. Then I switched the TV input to Tivo and had the same thing! That pointed to the TV as the problem. Fiddled with the tv Audio menu - still no joy. Finally I pulled the plug on the TV, waited 15 seconds and plugged it back in. Bingo!