In re-reading John Atkinson's measurements section, I suspect that something may be amiss in either the test sample or the test configuration. Since the Schiit Adapticlock circuitry is incorporated in the Yggdrasil specifically to address the clock jitter problem, the odd results of the word clock jitter testing and the significant differences between the left and right channels seem to indicate that something is wrong somewhere. Assuming that the circuitry for the left and right channels are identical, some component parameter [specified or unspecified] is different, a component is on the verge of failure, or the measurement configuration changed. Although Atkinson is not enamored with the choice of 21 bit vs 24 bit D-A converter chips [he mentions this more than once], the inconsistent test results between left and right channels certainly warrants investigation by Mike, Jason, and Dave.