I am using a HP Pavillion Multimedia laptop running Vista 64 bit. I am using the latest iTunes and all my music is in Apple Lossless format. I have a 3 foot usb cable and for the time being, it is on top of the dustcover to my turntable at the top of my audio rack.
You will find that the dac puts out a lot of output, it's much louder than my cd players or tuner. HRT says to run the volume on computer wide open and adjust from preamp, but I found that way doesn't give me enough range on the volume control. I am running the sound from the laptop at 75% and the sound is excellent, almost as good as my 2500.00 cd player.