As soon as the NUC starts to power up, the high pitch sound appeared. I started with a low budget (7€) LogiLink USB soundcard. I’m afraid I cannot use the combo audio jack, because I’m a noob linux user and wasn’t able to fix the combo jack audio recognition of my OS. The NUC is now disconnected and the setup is quiet easy (appendix C.jpg): mouse, keyboard and monitor are directly connected to the NUC. But normally, this results in a 50 Hz sound.
As I disconnected the video and usb switches, the high pitch sound wasn’t there anymore.Ģ) Then I thought, that there are may some ground loops. This happens when either just the HDMI or just the USB is connected to the switch.ġ) First, I thought the NUC has some EMC problems, but this wasn’t the case. The mouse movement was performed in the BIOS. It’s strange, but I can hear my mouse movement over the audio boxes. Actual this is the periodic movement of my mouse. I refer to the periodic high pitched noise. Ignore the 50 Hz electric hum, there I messed up. When the NUC is turned on, there a some weird high pitch sounds (hear appendix B.mp3). I had this setup before, but instead the NUC, there was a Laptop. The audio amplifier is directly connected with the tower pc.
The keyboard and mouse is connected via an USB switch to the NUC and tower pc, too. I have the following setup (see appendix A.jpg): the monitor is connected via video switch to the NUC and my tower pc. Would you be so kind to help me with a audio sound/noise issue on the NUC10i3FNK?ġ) usb sound cards on the NUC do not work noise freeĢ) NUC is disturbing indirect connected (e.g.
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