Hmm, I know that the drums for the Kurzweil were actually sampled in Castle Gould in Sands Point Long Island. As to how they recorded them exactly, is an interesting question. What equipment they used, and so on. The best person to ask would be Kurzweil employees like Geoff Gee, and former employee Jennifer Hruska who now owns her own sample company. To find out how to contact them, go to
www.sonikmatter.com to find out, or Young Changs website.