This forum's own kanker wrote this in a Keyboard Magazine article in November 2012:
THE NORD SOLUTION
Instead of investing the significant time and expense it takes to create new mono piano libraries, Clavia created algorithms that correct the phase issues that mono summing created in their existing (and future) stereo piano samples. The Nord Stage EX, Electro 3, Nord Piano, and their descendants access this feature via pressing the Shift button and a button marked (conveniently enough) Mono. The result is simple, elegant, and great sounding."
The Nord Stage 2 sounds much better in Mono mode than just summed to mono IMHO.
I vote for #2
Last edited by Kurt W; 10/24/14 05:16 AM.