I have a tv for my monitor. I recently switch to an hdmi cable so I could use its speakers instead of my headphones for a change. Not right away, but after a little bit of time the speakers would start buzzing and kinda getting an echo sound. By reducing the sound hz (or whatever they are called) in the volume and game panels helped reduce the time it took for it to do this. If I am watching tv I never get the sound buzzing echoing problem. So I then went and purched cheap $7 kenyo. I don't get the same problem but if they are on and not even plugged in to the computer I get buzz. I can change the sound by touching the connector. This is probably explained from just bad cheap speakers. Edit: I am using onboard audio I really am just looking for an explanation of what is causing this.