FMR’s Saturday morning programme was on my car radio as I headed to work. Berlioz’ Symphonie Fantastique’s ‘Scene at a ball’ was next on the playlist. It rustles in the strings in a minor key as the 2 harps play arpeggios, gradually modulating into the key Hector B chose to illustrate the heightened excitement of the appearance of the beloved at the ball: A major. We got there, but it was B flat major, not A. Released from the trammels of A major, the ebullience and whirling of the dance were literally and figuratively raised a notch in the new key. It was all I could do to prevent myself speeding to work in my excitement.