Angry Audio USB ANALOG AUDIO GIZMO

No, no, we’re not calling you a whiner! Anyone using computer audio has likely encountered the dreaded high-pitched whine rising up out of the noise floor. You might be thinking, “this is supposed to be perfect because it’s digital.” But your ears don’t lie. What is that annoying whine? That unwanted whistle is a symptom of a ground loop between your computer and your audio equipment via the sound card. It can be especially pronounced with the unbalanced audio found on many computer sound cards and motherboards. But even balanced audio interfaces can whine. And the usual ground loop suppression techniques such as ground lifting don’t always help. Of course, one way to eliminate the problem is to replace the sound cards (and motherboard audio) with a USB interface. This gets the audio circuits outside of the computer’s internal noisy environment. And if it’s balanced audio, even better. But surprisingly, that digital whine may still appear, even on external USB interfaces. Ground loop a