That begs the question, "What should I feed my piano?"
A good balanced diet of Hanon, technical tidbits, a Bach pre&fu or two, with some Beethoven and Chopin, Liszt or Mozart for a main course, maybe some noveau delicacies, and a couple etudes for dessert.
Its okay to have a jazz and/or rock treat on weekends, with a few of heavenly morsels on Sundays.
Sorry you asked?
