Guys - need some help. My DAC is losing signal intermittently. I use the digital (toslink) output from my MAC Mini. Music plays normally for some short timeframe, then sounds like it's getting pulled through he matrix. It's recognizable as music, but portions of the signal are scrambled. Power-cycling the DAC resolves the problem immediately, only for it to return a few minutes later, randomly. Sometimes the problem resolves itself without intervention. I'm running Amarra 4, although using iTunes without Amarra produces the same result (so it doesn't seem to be software related). Any suggestions on what could be at issue here, or how to troubleshoot?