DR HDMI 8K
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DR HDMI 8K / Glossary / sample rate
AUDIO

What is sample rate?

Sample rate is how finely audio is measured in time. Over HDMI it is not one setting but a capability declared separately for each format.

In plain language

48kHz is the standard for video content. 96kHz and 192kHz appear on high-resolution releases. Higher rates carry more data and need more bandwidth.

Why it matters in your setup

The rate is declared per format in the capability data, which is why a chain can support TrueHD at 48kHz and not at 192kHz. A source will then send the lower rate without comment.

The trap worth remembering: Atmos over ARC requires a cable that supports 192kHz audio. A cable can carry 600MHz video perfectly and still fail the audio return — which makes it look like a device fault rather than a cable one.

What the DR HDMI 8K does with it

Each of the DR HDMI 8K's audio flags carries its own sample rate control: L-PCM up to 192kHz with a bit width setting, TrueHD, DD+ and DTS-HD MA each up to 192kHz, plus one-bit audio. The EDID readouts show the advertised PCM capability including its rate and bit width.

DR HDMI 8K in one line: it is a 48Gbps HDMI 2.1 EDID manager, emulator and repeater that sits between your source and the rest of the chain, so you can see what is being negotiated and decide what the source is allowed to see — instead of guessing which device is at fault. What it is and what it solves →

Related terms

LPCM →audio flags →ARC and eARC →Dolby TrueHD →channel count →

Read more

HDMI audio EDID →Manual: ARC and 192kHz →

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