jack noise

Hello everyone. I just built my new rig and all went well, but whenever i connect my soundbar to either audio jack it starts making a really high pitched sound. The soundbar works with anything else, and the jack works with the headphones with no problem.

My current setup has some problems, I work in IT so my desk is by default cluttered with two monitors from a big desktop, and at least two laptops running at the same time. There is a somewhat organised mess of cables running everywhere to tie everything together. Besides working in IT, I also...

Connected to a vga display is a desktop. The display has speakers connected by an audio jack cable. Depending on what website you are on, the speakers make a low noise. It was the same noise when I used a vga cable having no magnetic rings. After switching to a cable having two magnetic rings...