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 9

Roku Ultra LT only outputs stereo regardless of setting

Wish I could make it work.

Having to use TV's builtin Smartcast.

HDMI, up to date. 4K BR player, TV, and Smartcast (all but Youtube) all do DD. Not Roku. 3 chats to Vizio, 1 to Roku. Nope. just 70's stereo.

Roku 4662X(4662RW), retired: Roku 4630X.
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