Ludwig van Beethoven, the composer who, more than any other, changed music, the sound of music and what it is that composers do, wrote nine symphonies that jolted music out of itself. Life could never – would never – be the same again. The “classical” rationality of structure, harmony, form, melodic development and orchestration span into open-ended possibility. And, nearly 200 years after his death, no one expects the pieces to settle down again any time soon.