PC Perspective posted a review on the Belkin F1DD104L SOHO KVM Switch with Audio and DL DVI

The USB emulation also works perfectly - we have not had any issues with the keyboard or mouse in normal use or while benchmarking - no more USB attach/detach sounds to be heard here. Because emulation begins as soon as the system is turned on, you don't even have to "select" each system while it is booting up - it will come up to windows perfectly without issue. Speaking of hearing, the audio and microphone connections were also flawless and the ability to listen to audio from one system while using another worked as expected.

KVMs aren't usually a topic of conversation in these parts, but when a product makes me nearly weep with joy, I can't help but share it with the world. The new dual-link capable Belkin SOHO KVM is the answer to many user's PC habits!

Belkin F1DD104L SOHO KVM Switch with Audio and DL DVI Review