Just received the new Peachtree Audio DAC*iT and have to give first impressions. First of all, clarity in instruments is greatly enhanced. I'm using a mac mini with Pure Music. Source media was a 16 bit 44Khz ALAC file of Adele's "Lovesong." First I used my old MF V-DAC. Then the DAC*iT in optical mode and then in USB mode. The difference was significant. Even between optical and USB mode. The USB mode was much more defined without coming across as overly bright. Surprisingly much better than the optical mode. My wife and I listened to the song over and over again and we both agreed the USB mode with the DAC*iT was the best (not that it sounded bad through the other modes). Only one problem, the mac mini will not play anything higher than 48 KHz in USB mode. I tried Pure Music, iTunes by itself, Decibel and VLC and everytime I tried to play a 96Khz file, the program did nothing and wouldn't play. I set both sound settings and Audio Midi to "Peachtree USB DAC" and nothing. It would play hi-res through the optical cable but not through the USB. I haven't figured out if it's a DAC problem or mac mini problem. The sad thing is that it definitely sounds best through the USB connection.