Playback Issues - Audio/Video & Power

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

Intermittant Chirpy or Pulsing Audio - Roku Ultra 2020 version

Roku Ultra (2020) connected to LG Oled TV via HDMI.  Using HDMI Cable with Ethernet to pass audio via ARC to Marantz SR5007.

On Amazon Prime, audio will play correctly 1 time.  Then, when the same show is selected, the audio either chirps rapidly or pulses on and off.  Any prime video selected after that stays chirpy or pulses.

Other apps seem to play fine.  For example, ROKU CHANNEL plays audio correctly.

Restarting ROKU does not have any effect.  Have looked for an applicable audio setting but have not found one.

Any help is appreciated.  Thanks.

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