Humming Sound From speakers

I have desktop with i3 540, 4gb ram, gt 218 graphics, i have connected my speakers into line port, the speakers have there own power as well, I hear humming noise from my speakers, it disappears when i open any app or window, but during idle it keeps coming, i have zorin os core installed, i had this problem with ubuntu like os only, last time when i was using mx linus it was fine, i was wondering maybe its something related to audio power saving i am not sure though, any help would be much appreciated.

Hi, Junaid.
There are some suggestions here you can try.