I think this must be the PCM.
In addition to the normal analog output, this synth has a digital S-PDIF (16 bit 48 kHz only)
Looks easy to use with illuminated keys that makes it even clearer.
Well, I could not study it in depth yet but I tried it: it sounds piano breathtaking ))))) would be a real piano )) ))
At first glance, especially c'es piano sounds that stand out here.