Could you please provide us with the following;
- Intel® HD Graphics driver version installed. Please go to Device Manger> Display adapters> Intel(R) HD Graphics right click on Properties and then go to Driver, you will be able to see the version installed.
- BIOS version.
- Brand and model of the speakers.
- Windows® 10 build version.
Please try reinstalling the current driver version, see here for the download; Download Intel® HD Graphics Production Driver for Windows* 10 64-bit (N-Series) and I would also recommend running Windows Updates on your NUC.