Sound buzzing

Hello everyone im having issues with my motherboard soundcard because i have recently purchased a new keyboard that had the cables to connect into the soundboard, when i plugged them in the volume increased and a buzzing sound was noticeable. I downgraded the soundboard to another driver and the volume went low again and the buzzing sound almost dissapeared but still there, you can notice it when you use the volume from windows, from 0 to 1 there you can notice a little buzzing sound, and my question is if its a electric failure or ai can fix it with anything else. Thank you for your support.

Is the buzzing coming from the speakers/earphones?

If so: Have you tried using the other audio jack on the PC? (there's normally an output on the front, and also an output on the back of the PC) 9 times out of 10 this works for me. I know on my own desktop the front audio jack has a small amount of interference but the back panel is perfect.

The front panel works exactly the same as the rear panel i have almost every cable spearated from the jacks and i tested if they made any type of interference. I think its an electric failure from the motherboard anyways.