Hi @Dpredbird,
A warm welcome to the Roku Community!
If you're using a private listening feature on your Roku device, automatically, the audio on your TV or device will be transmitted directly to your headphones, and the sound on your television will be muted. For more information, you may visit our support page here: How to use the private listening feature on Roku devices
If you have any other questions or concerns, please let us know.
All the best,
Chel
Jecheal R.
Roku Community Moderator