sure did...downloaded the latest update. didn't help at all. tried every fix mentioned amongst the various users, to no avail. I'm really surprised that Roku support doesn't have a fix for the sound issues. Thinking it was my TV, I bought a new TV, only to have the issue still - WOW, was I upset!! Just got a new Apple TV streaming device...works like a charm! No more sound issues!!
I would highly recommend anyone that has an Ultra to toss it or take it back for a refund, and upgrade to the Apple TV. Poop on Roku. I would've hoped with as many people complaining they would listen...maybe they will if/when they loose enough business to Apple??