A warm welcome here at the Roku Community, @david11226!
Thanks for raising your audio issues with us. No worries. We're here to find you the best resolution possible.
May we first know if there is any external audio connected to your Roku Ultra? If so, kindly provide us with the model. Furthermore, could you tell us the specific steps you've taken to try and resolve the issue?
The best course of action will be suggested once we have a better understanding of the situation. We'll be anticipating your response.
Kind regards,
Carly
Carly Y.
Roku Community Moderator