"It's not what you look at that matters, it's what you see." Henry David Thoreau
Noise. It's everywhere. When we're talking about hi-fi, noise can present a particularly thorny problem ranging from stuff we can readily hear apart from the music, to noise that is more insidious sneaking into our playback chain and infesting our precious analog signals and our music along with it. Some people like to think that noise is a non-issue, especially when it comes to digital (after all bits are bits), but that's simply not the case since we're talking, ultimately, about the analog world. First a real-world story where we measure the effects of cable related noise.