What Makes a Piano Truly Great?

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Welcome to LivingPianos.com, I'm Robert Estrin. Today's question is: What makes a piano great? I have come across thousands of pianos in my life. I literally grew up with pianos. We had four pianos in our home growing up because my father, Morton Estrin, was a concert pianist and a Baldwin artist at that. We had three Baldwins at one time, a Steinway, a Sohmer; we had different pianos at different times, but I grew up with all of those pianos. I got to try out my dad's pianos before recitals at Lincoln Center and Carnegie Hall. During his recording sessions, whenever he took breaks, I'd play these magnificent instruments that were prepared to such a high level.