Works great with Micromega MyDAC from 44.1 kHz thru 192 kHz sample rate (16-24 bits) on 0.3 beta/Raspberry Pi 2 using USB and HifiBerry Digi+
Notes:
Still have question open on Sound Signature (optimization profiles) topic elsewhere on this forum, as I cannot hear any audible differences between various settings using USB (Digi+ not tried yet) MPD: volume control disabled