Thanks for flagging this issue here in the Roku Community, @LotharK!
We understand that you're experiencing trouble with your Roku Ultra's audio when trying to stream. No worries; we're here to help.
You may try the following troubleshooting steps below to see if the audio issues on your Roku Ultra disappear.
- Try changing an HDMI cable. HDMI cables are also responsible for carrying the sound from your Roku to your TV; you might need to try changing it to see if the issue persists.
- Try a different HDMI port on your TV. This will determine if the initial port where the HDMI cable was connected was causing the problem.
- Try it on a different TV. It could also be possible that the TV is causing the issues; trying it on a different TV will help us determine whether the issue lies within the device or the TV itself.
If the issues still persist after doing all the steps above, let us know and we'll help you further.
We hope this works for you.
All the best,
Emman
Emmanuel-D.
Roku Community Moderator