Sound Distortion on HDMI using Intel i5-6600K


  1. PJLLB
    Posts : 384
    Window 10
       New #1

    Sound Distortion on HDMI using Intel i5-6600K


    I'm trying to use the HDMI audio capability of an Intel i5=6600K processor (it has the Intel® HD Graphics 530) on an Asus Z170-A motherboard (with the has an on-board Realtek ALC892 high definition audio CODEC function. The system is connected to a Denon AVR-X2400H receiver. All devices have updated drivers and software. However...

    Initially, the HDMI audio is fine, but after a period of time (sometimes short, sometimes a bit longer) the audio quickly becomes severely distorted. Only restarting the PC temporarily fixes the problem. I have tried various combinations of enabling and disabling the Realtek sound devices, etc. The HDMI video is fine.

    Does anyone have any suggestions? When I install an NVidia GeForce 750 TI video card and use its HDMI output, audio and video are fine, so I don't think it's the Denon receiver. It seems to be something about the interaction between the Intel HD audio and the Realtek sound function.

    Does anyone have any ideas on what's going on? I would use the optical output of the Realtek but I can't get anything but stereo when I should get DD 5.1 multi-channel. But that's another frustration that I would appreciate guidance on too if I am unable to solve the issue with the Intel HDMI audio. Thanks in advance.
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  3. sandyt
    Posts : 1,223
    Windows 10
       New #2

    HDMI audio is handled by your graphics card driver, nothing to do with Realtek.

    Windows 10 has no 5.1 optical output capability because Microsoft didn't paid Dolby for Dolby Digital. Realtek, the actual chip, can decode Dolby Digital 5.1 via optical output.

    BUT it is up to Asus to pay Dolby for the Dolby Digital 5.1 optical output license --- which Asus didn't pay for it.

    You can play 5.1 optical out on the Netflix Windows 10 app on your motherboard --- Netflix paid for Dolby Digital.
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