Time to call on the experts. I just bought a new set of speakers to use with my computer. I exceeded my budget, but they're really nice. Audio Engine A5+. I also got the DAC, a digital converter that takes a USB connection from the computer instead of the usual headphone mini plug. The path is USB > DAC > speaker inputs. I went into preferences, and selected "USB Audio Engine D-1" as the sound source. No problem. I noticed that I was getting some "clicks" at random that sound like digital artifacts. I thought maybe I had a bad CD transfer. Other music seemed fine, so I know it's not the speakers or DAC. Then I realized I was also using the USB keyboard and had a browser open also. Doing two things at once. In your opinion, was I hearing data from the keyboard or browser getting into the other USB ports? What's the solution? It's not disastrous, but annoying. You wouldn't want to record something that way.