Originally Posted by jazzutako
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And I'm started thinking it's not the swirl but there's something going on during the rendering process,
because I don't really hear the noise when editing and playing.
The noise appears after rendering.
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Jazzutako

If you don't have the Realtek Audio Console you might want to get it.
https://realtekaudioconsole.com/
There may be something there that can help you.
Note that I do not have any experience with it-----yet. I am going to DL myself and take a look at it.

Whenever I get something stuck in the back of my throat, I dislodge it by drinking a beer.
It's called the Heineken Maneuver.

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware