I order the set on Amazon, used, for over 100 euros. It comes with a pile of CDs and a “Handbook,” basically a thick CD booklet. One morning, I make myself comfortable next to my electronic keyboard and pop Masterclass 1 into the player. The masterclass begins by talking up the value of perfect pitch. Without it, “something is lacking,” the voice tells me. He says that listening to music without perfect pitch is like watching a movie on a black-and-white TV.