Question What is this loud buzzing noise?

Jul 17, 2022
Recently, my USB interface has been acting strangely,

There is a loud hum and buzzing noise that isn't from the microphone.

My multiple setup is that of a preamp to compressor, and then USB interface for the laptop.

There is no problem when I connect the preamp to the USB interface, Works fine.

There is no problem with the compressor. The tubes and capacitor are working.

When I tried to connect the preamp to the USB interface using a DI box, the loud buzz starts again.

I'm not sure what is going on.

Here is the sound sample (WARNING: LOUD BUZZ)

Here is an image of the Waveform:
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