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Shawna Erholm

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Aug 2, 2024, 3:49:12 AM8/2/24

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LOL I was just thinking about that today. I don't recall what all the defaults are, and the ones I have flipped I haven't really 'tested' them, so I can't say. And then you have all the different scenarios with different media where it may or may not affect your experience.

Every digital audio is PCM, from the basics, but encoded differently. One of its encodings approach is Dolby Audio, this having reference audio levels (volumes) for home theater listening, which is a quite old standard nowadays albeit used. They scope 85dB average, 105dB peaks in any satellite speakers (front left/right, central, side left/right, surround left/right). This setting will set any and every digital audio source (PCM) being passed through (or decoded) and level it to Dolby reference. It can help improve the dynamic range by using a standard. Netflix content has narrow reference levels and by matching Dolby it gets closer to the dynamic range of it, for example.

You might be familiar with the high-resolution audio term or going through Windows Audio Settings and seeing CD-quality, DVD-quality, and Studio-quality as audio quality options. As an industry standard, CD is the equivalent of 44.1kHz at 16-bit PCM audio, while DVD is commonly 48kHz at 24-bit, and Studio is 96kHz - 192kHz at 24-bit. It illustrates how many times per second it can sample (x times 1000 Hz) and how much data it can hold (216 or 224 different numbers representing data per sample). High-res audio starts beyond 44.1kHz at 16-bit and the term is normally used for 96/24 or 192/24.

I have both enabled. I'm running the Shield in an LG CX and a Samsung Q950A and both support the most common high-res lossless audio formats, although the TV only via passthrough since by itself it caps at 44/16. I passthrough all the data digitally through the TV to the soundbar that, then, decodes it and converts to analog.

Turn on frame rate matching: Apple TV automatically plays video in the best available format supported by your TV, which includes resolution, dynamic range, and frame rate. To instead watch content in its original frame rate, select Match Content, then turn on Match Frame Rate.

Turn on Quick Media Switching: To reduce delays when switching between frame rates, select Match Content, then turn on Quick Media Switching (QMS). This option appears only if your TV supports it. QMS works best when switching between formats that use the same chroma. To make sure your TV uses the same chroma for all frame rates, select Optimize QMS, then select OK.

Audio output (Apple TV 4K): If you connect one or two HomePod speakers to Apple TV for home theater surround sound, all audio, including navigation clicks, is routed to the HomePod speaker(s). You can change this setting to other available speaker options. See Use Apple TV to play audio throughout your home.