Which is best option to set on TV for getting Atmos sound when using hdmi eARC with apple tv 4k?

Options
Apple tv 4k shows Auto, Atmos Available
Connections:
Apple TV4k <===hdmi cable===> TV hdmi port

Soundbar/receiver <===hdmi cable===> TV hdmi eARC port

Which is best option to set on TV for getting Atmos sound when using hdmi eARC with apple tv 4k? 0 votes

Pass through
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PCM
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Bit stream
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Dolby Digital
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Dolby Digital Plus
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Auto
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