Recently I checked the forums on the PS Audio website and find that the guy who wrote the code for the DirectStream memory player left, and as they were working to fix bugs in the code, found it to be such "spaghetti" that they are (apparently) rewriting the code, rather than trying to fix what he programmed.
I see that some folks have installed an "interim" version of the new code and report that the sound quality is improved...but the new code has some problems. So, I'll be waiting till PS Audio publishes the new code as a more "final" version.
The unit I have has an earlier version of the code, and the sound quality (when paired with my DirectStream DAC with the I2S HDMI cable) is the best digital I've ever auditioned.