If the audio is delivered to the TV and sounds ok when output there, logic would say that the problem is either in the generation of the TOS output (which means a TV issue) or its handling at the receiver (which means a receiver issue). Still, let's look at the NUC connection before passing on the blame. Have you tried a different HDMI cable (perhaps a better quality one)? If you connect some other HDMI source to the TV (like a DVD/BDR player), does the same issue occur (with same/separate cable)?
Hello Kos T ,
Thank you for joining the Intel communities.
Do you have high quality HDMI cable?
If you are attempting to connect to a TV that supports 1080p, 4K, 3D or Deep Color, you will need to use a High Speed HDMI Cable. To verify you have one of these, look along the cabling itself for the printed text which says “High Speed HDMI Cable.” If it is not there, you may not be using a cable that is required to work with your display device.
If your HDMI TV supports speakers, select HDMI audio as your default playback device from the Windows* Sound control panel:
- Click Start > Control Panel > Hardware and Sound.
- Click Sound. The Playback tab lists the audio playback devices for your computer.
- Right-click on the device for HDMI audio, and select Set as Default Device.
- Right-click and select Test. If you hear a test tone, click OK.
Also try the following:
Uninstall the graphics and audio driver and then install only the graphics driver.
Update the BIOS; please download the latest BIOS version.