Beam Dolby Digital 5.1 vs Arc Multichannel 7.1 PCM

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So my LG LED uses a Beam with Arc and a gen 3 Apple TV and with 2 Play 1s it shows Dolby Digital 5.1 as it should. When I watch the exact same content on my LG OLED with eArc surround and an Apple TV 4k (old version) I get the MC LPCM 7.1. Why the difference? I haven’t made any major setting changes on the led setup and it’s fine.

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G

GuitarSuperstarAnswer

Lead Maestro

The Beam/Apple TV Gen 3 setup only supports up to Dolby Digital 5.1 audio. The Arc/Apple TV 4K setup supports up to Dolby Atmos and multichannel LPCM audio when connected to a TV with HDMI eARC. Also the Apple TV 4K uses Dolby MAT which will play all Dolby Digital Plus audio as multichannel PCM through the Arc.

"Receive with simplicity everything that happens to you." - Rashi

G

GuitarSuperstarAnswer

Lead Maestro

The Beam/Apple TV Gen 3 setup only supports up to Dolby Digital 5.1 audio. The Arc/Apple TV 4K setup supports up to Dolby Atmos and multichannel LPCM audio when connected to a TV with HDMI eARC. Also the Apple TV 4K uses Dolby MAT which will play all Dolby Digital Plus audio as multichannel PCM through the Arc.

"Receive with simplicity everything that happens to you." - Rashi

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