Okay, as this was outside my area of expertise in sound programming on the Korg, I asked my m8,one of the acknowledged "gurus" of Korg sound programming, Sharp, over at Korg Forums...I gave him a reference to that NAMM demo, and asked if he knew if this was possible on the PA3....here is his reply.....

Hi Dennis.
The KRONOS, OASYS and Pa3X can easily do this.

DNC inside the Px3X can really make easy work of this too. Everything he spoke about on tuning per layer, splits and even his use of switches and controllers has existed in all KORG keyboards for a very long time.

He's using a sound he created that is split and mapped out. On the Pa3X you can copy the OSC's of any existing sound into your new sound and start building up your layers, splits, tuning, DNC and controllers / switches with no problems at all all from a single program.

Cheers
James

I did also ask if he could pop in here and maybe write a few lines, but he is really SUPER busy so he may not have time...So it seems it is possible after all..