I have some fairly old speakers(2) from Logitech. They are powered by a single USB and 3.5 headphone jack cable from my motherboard. Every time I launch a demanding application such as Watch_Dogs 2 or even Minecraft, the speakers begin to make a high-frequency noise. The noise disappears when I close the application. The pitch and loudness changes when I move my mouse. While the computer is idling or being used for nothing demanding, the speakers have an audible hum/squeal.
Any suggestions as to why this might happen would be much appreciated. Please note, this didn't happen when I used these speakers with a laptop
