In last month's Gramophone Dreams, I explained why doing any sort of empirical study of high-quality digital sources was extremely difficult. That any success I might achieve as a reporter would boil down to my ability to employ metaphors to describe a DAC's clarity and dynamic personality. Concocting metaphors for DAC reviews is risky because it assumes readers will be familiar with the sound of my amplifier and speakers and, ideally, with one of the DACs I'm using in the comparison. That's a lot to assume.