the "reason" is my live stream. For what ever reason my 3,5mm Jacket on my PC didnt work anymore, over night there was a really loud disorted noise in the pink 3,5mm. So i digged out my old UMC 22. Here is my setup: SOURCE OF MUSIC: Smartphone > BluetoothReciever > hooked to my Yamaha MG12XU with 3,5mm to 6,5 Y Cable > Output through Monitor OUT R&L Line > The Y Cable goes into my UMC 22 > UMC 22 goes in PC via USB, because i needed a workaround for the 3,5mm jacket. Why? So my Yamaha only outputs ONE Line wo my PC called "Line MG" To control my music volume for the stream i need in OBS (Openbroadcaster Software) a NEW and standalone line where only the music comes through. And now i have the problem i hear a noise as well. I tried "noise reduction" filter in OBS. But the quality of the music gets "ruined".
So because my 3,5mm jacket on my tower didnt function anymore. I connected my Behringer Interface to my MG12XU. For reasons i need the music line in a different complete line then my mixer. My Behringer has a strange background noise when no music is playing. I installed the ASIO4ALL Drivers v2 on my WIN 10. But still this background noise is stil present. It's awful! Is this a general behringer problem? If further info is needed im here.