Hi @Kurosaki_7
Welcome to the Sonos Community!
I assume you mean Multi Channel LPCM as stereo PCM isn’t worth chasing if you’re already getting Dolby. You should be able to play MC-LPCM from your PS5 to your Arc.
Please ensure that you are using the HDMI cable supplied with the Arc. Rebooting the TV by unplugging it from power for at least 1 minute may also help.
Next, please try the following settings on your LG TV (thanks, @Ken_Griffiths):
- Sound -> HDMI ARC (Digital Sound Out = Pass-Through / eARC = ‘ON’)
- Sound -> Additional Settings (DTV Audio = Auto) / HDMI input format = Bitstream for all HDMI ports.
- Connection -> HDMI Device Settings (Auto Device Detection = ‘ON’ / Simplink = ‘ON’ / Auto Power Sync = ‘ON’)
If you still have issues after all this, I recommend you get in touch with our technical support team, who go through some real-time troubleshooting steps with you.
I hope this helps.