Had slow motion sound yesterday while watching on my Roku3. This is the 3rd time this has happened with 2 different Roku3 units (and the same TV.) When I switch inputs to my cable box, the problem does not go away until I do a complete shutdown to my system.
The last time this happened, I thought my soundbar was at fault and I brought it into the Geek Squad. I also tested my TV sound settings when the slow audio was happening (using the TV sound test option) and the sound tested good. So I know it is not the TV or the sound bar (which tested fine at Best Buy.)
When shutting the TV off and re-powering the Roku, everything is normal again. I set the audio options now to stereo on the Roku. Not sure if the surround sound option was causing the issue. I don't have the issue when using the earbuds.
My TV is an LG LA7400. I did make a video of this weird occurrence, but I'm unsure on how to post it here.