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Inpulse 500 generates a whine when HDMI extension monitor is plugged in

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I am working on extending my gear to include karaoke. Each of the three USB ports is used for lighting, music, and the Inpulse 500.

When I go as far as adding any external monitor via HDMI, a high pitched whine is generated. I've noticed that when I've reset the connection on the controller, the whine changes pitch during the start-up light show.

When I set up a secondary laptop to handle the karaoke portion and feed the audio from my mini-mixer to the aux input of the controller, there is no issues at all. This isn't my preferred means to handle it, but it is quieter.

Any known fixes with the HDMI-USB on my DJ computer?