Why Can’t My Receiver Pass Dolby Vision From an Apple TV?

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Q My Denon AVR-S930H receiver supports pass-through of Dolby Vision high dynamic range. However, when I connect my Apple 4K TV to it, the Dolby Vision setting on the Apple box becomes unavailable and the signal changes to the HDR10 high dynamic range format.

I know the Denon passes Dolby Vision because when I connect my Oppo Ultra HD Blu-ray player to it, movies are displayed in the Dolby Vision format on my LG TV. I also know the Apple box isn’t the problem because Dolby Vision works when I connect it directly to the TV. Is there a setting in either the Denon receiver or Apple TV that I’m overlooking? —David A. Pilsner

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