Sure. The software is DSSF3 from http://www.ymec.com/ Downloadable for free in case anyone wants to replicate my results. No microphone is used - it's a straight loop-back, DAC out -> PC in. My DAC is based on the Twisted Pear Buffalo, but heavily modified. The rest of my system is DIY too, except the heaphones of course which are made by Koss, although I use speakers most of the time.