Point 1: it looks like DSD Direct (from Jussi)
Point 2: it looks identical to the PrD Direct (aka DSD Direct) mode
Point 1 + Point 2 => D6 looks like DSD Direct at vol 40 and max vol (even with DSD Direct off)?
Based on my understanding of all the previous discussion, Jussi was comparing the result from how the dac handle differently between 44.1k input and dsd256 to tell if it is DSD Direct.
With a single chart, it seems not possible to tell if the DAC is DSD Direct or not.