I was watching the Roku channel as late as last week and the audio was fine. Recently, this past weekend, the audio became degraded. I'm receiving a background track but the dialogue track is not audible. This is occurring on any random selection on the channel. No idea what may have caused this issue but it has to be a change implemented on the Roku channel since my device settings have not been changed and I'm able to continue receiving audio on all other channels. I've connected my Roku device to my audio receiver which is connected to 2 speakers using just the left and right channels.
The same thing happened to me. This did not fix the garbled, inaudible audio, however, it has allowed me to use my roku and 'hear audio clearly'. I connected earphones to the remote. Of course, this only allows 1 person to hear audio clearly. I have factory reset my Roku, unconnected it and reconnected it several times. Still have very garbled audio and not at all understandable. I'm very disappointed with Roku. There seems to be no way to get in touch with Roku. This is a problem with their device and they need to fix it.
Try removing the channel from the Roku home screen by navigating to the channel tile, pressing the * key on your remote and choosing 'Remove channel'. Then restart your device from Settings>System>System restart. Once your player starts up again, add the channel back once more. Does this clear up the issue you are seeing?
If you are still experiencing an issue, can you please provide the following information:
-Roku device model
(these can all be found in Settings > System > About)
-does this issue occur on a specific channel? if so, what channel and what version/build is the channel (this can be found be selecting the channel on the Home screen and pressing the * button)
-specific title where you see this issue occur
-tracker ID when this issue occurs (when you see this issue occur, press the Home button 5 times, followed by the Back button 5 times)
-steps to reproduce the issue you are seeing
Once we have this information we will be able to investigate further.