Hi so i recently purchased a pair of JBL lsr305's and connected them to my MSI motherboards onboard sound via a unbalanced dual 1/4 trs to 3.5mm cable shown here http://www.guitarcenter.com/Livewire/CMP1515-35mm-TRS-Dual-1-4-Y-Cable-15.gc After i connected them i noticed that they emit a buzzing noise when i scroll or do anything on my computer im pretty sure its emi or rf interference but i dont know what causes it since it still happens with nothing else plugged into the computer, just the 3.5mm cable and power cord. noise is not there when i plug the speakers into my phone so thats why i think its emi also it is not noticable when playing music or if if the speakers volume is set below about 4 but maybe i just cant hear it. So my question is what would they best way to get rid of this noise be? new cable, audio interface, or adding a sound card to my computer?