Solving playback issues

Help with audio & video playback issues, TV display type recognition & compatibility, HDCP messages, troubleshooting playback errors, advertisements, and resolving power issues.
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Level 7

Audio will not play through sound bar with new Roku Ultra, previously worked with Roku Express

Hi, I recently received a Roku Ultra and cannot get my audio to play through my sound bar. It previously worked with my Roku express. The sound bar is connected through optical connection directly into my TV. There is not an HDMI port on my sound bar or I would try that. Thank you for your help.