This message was posted on behalf of Intel Corporation
Thank you for bringing this to my attention. I understand you need compatibility information for the USB DAC and a Kaby Lake processor.
I was checking specifications for HDMI and Display Port audio support and indeed you will be able to play AC-3 Dolby, DTS-HD and some other audio formats through those video ports.
I regret to inform you that Intel does not have any type of audio compatibility information when using USB-DAC device. I would recommend contacting the device manufacturer and check the supported audio formats.
Hope it helps.
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