One of my interests in music has always been what it means, why it affects us the way it does.
One of the big mysteries of music is, if you take music without words, it means something to us because we know it's about something. It's about something important humanly, but since there are no words, nobody knows what it's about.
A piano is a machine, but you've got ivory and there's weight behind the keys and you have this really - you feel the resonance in the instrument, you feel the vibration in the pedal. I mean, these a still very crude.