“An ode to silence” is how harpsichordist Jean Rondeau has described Bach’s Goldberg Variations. “I feel they were written for silence, in the sense that they take the place of silence,” he says. “All Bach is there in the Goldberg Variations … all music is there ... and I will no doubt spend my life working on them.” To prepare his interpretation he consulted an original printed edition of the work, containing Bach’s own markings...