No mispelling. It was painful. I switched on the car radio, set as usual to FMR. They were in the middle of the first movement of Tchaikovsky’s 1st piano concerto. I know the piece well, having bashed my way through the piano part in my youth. B flat minor, shifting into its beautiful 5 flat cousin D flat major. I instantly knew that I was hearing the music one semitone higher in B minor, a sharp key. It was all wrong. I listened for a while but had to turn it off. As I thought about the song-like slow D flat major second movement that would have come next pretty certainly shifted away from the key that gives it its wonderful lyricism, I experienced a deep sense that I had lost something important. Would I ever again experience the music with any meaning, any satisfaction?