I also encountered the problem today and didn’t find a solution on the internet, so I had no choice but to try everything possible.
My solution was to create a SoundClass and a Submix. In the submix I set Submix Level>Output to 0.
In my SoundClass I set my Submix as the default Submix.
Then I selected my new SoundClass in the AudioCapture Component.
Now I don’t hear my voice when recording and my sound files have only my voice in them.