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What does HD mean on Now Playing screen

  • November 21, 2022
  • 1 reply
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Stuart_W
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  • World-Class Superstar
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I just noticed today whilst playing from music I ripped onto my NAS that I am getting an “HD” icon on the screen. I looked at the Sonos blog and they mention HD music but then say there’s no accepted definition of what that means - sampling rate, bit depth etc. So I wonder what this is telling me or what criteria for showing the HD icon are?

This file is FLAC 44.1KHz (There doesn’t seem a straightforward way to get bit depth in Mac OS).

NB I tried another file I have and that is m4a and 44.1 KHz and also shows HD

 

Best answer by GuitarSuperstar

HD - 16-bit with at least 44.1 kHz sample rate

HiRes - 24-bit with at least 44.1 kHz sample rate

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  • Lead Maestro
  • 10452 replies
  • Answer
  • November 21, 2022

HD - 16-bit with at least 44.1 kHz sample rate

HiRes - 24-bit with at least 44.1 kHz sample rate