13 or 14 yrs. old. I had been studying organ since age 8, and when I mentioned to my teacher that I was thinking about a music major, he looked at me, and said, "Well, then. You must study piano." From that point on my lessons were on the piano - once in awhile a piece on the organ. But mostly piano. And I've never looked back. To this day, although organ is near and dear to my heart, I prefer playing piano. Fortunately for me, my parents owned a music store so moving pianos and organs in and out of the house was no big deal.