Thanks, Ryann and I do understand the angst. Of course the PST plays the 44.1kHz version of the SACD and what you were hoping for was the downsampled version of that at 88.2kHz.
That downsampling of the DSD layer was a built-in function of the core Oppo transport mechanism and one we debated about implementing when we launched DMP. At the time I felt unhappy about the LP filter algorithm they used for the downsampling as it had added phase shift that, properly implemented, would have been amazing to listen to but… To my ears the unaltered CD layer sounded better than the downsampled DSD layer but, what the heck, it was a freebie feature so we left it.
Unfortunately, that same downsampling hardware function is not available in the DM transport mechanism used in the PST. Had we to do this over again and if we knew it was something important to folks we could have built a proper phase-correct LP filter and output buffer in the hardware to accommodate the function. Unfortunately, this was not on our radar at all. I apologize.
It may someday be possible to execute a LP filter in the output FPGA to render the DSD layer but it still couldn’t be phase perfect. That is because the processing requires a look forward function. Look forward functions depend on extensive RAM buffering to place the file in storage, perform the processing, etc. That hardware is not on the PST.
Do give the non-molested 44.1kHz layer a good listen. Honestly, with what we’ve done with galvanic isolation, elimination of jitter, and the new output stage, I’ll bet that layer, compared in a direct A/B with the downsampled DMP output, would perform as well or better.
Let us know.