Thank you, this is a very interesting topic to me. I remember ,when I was a kid in the 90s and had the Sound Blaster card, 1.0 or something quite cheap and in c

Thank you, this is a very interesting topic to me. I remember ,when I was a kid in the 90s and had the Sound Blaster card, 1.0 or something quite cheap and in certain situations I would hear very similar but quiet interference on the headphones when there was no sound playing.