Last week I bought a new 2011 Mac Mini (base model), and one of these DVI KVMs w/ audio (http://www.amazon.com/Syba-SY-KVM20...OR8S/ref=sr_1_1?ie=UTF8&qid=1312208877&sr=8-1) to switch between the Mac and the PC. Unfortunately, I'm getting a hum and crackling noise over the audio on the Mini, and its volume seems a bit low. It doesn't happen when connecting directly to the Mini, only when going through the KVM. But my PC's audio sounds just fine through the KVM, as does my MacBook Pro & iPhone when I try them on the same port. I did a bit of googling and it sounds like I have what's called a ground loop? Both Machines are running from the same surge protector on the same outlet, which sounds like one step in eliminating these problems. I see there's something called a ground loop isolator which may be able to filter out the noise, but may also adversely impact audio quality. Seems like a band-aid fix too and I'd rather get to the root of the problem. Any ideas? Thanks in advance. BTW, not shown in the picture are the headphones I have connected to the KVM.