Is interpretation a form of improvisation?
Point/counterpoint: Violinist Nadja Salerno-Sonnenberg says you don't have to change the notes to improvise -- interpretation is a form of improv. Pianist Robert Levin disagrees. We'll consider the question by comparing VERY different versions of the Bach Goldberg Variations. AND... some composers have written pieces intended to sound like improv, but... you have to play the notes they wrote. Schubert "Impromptus," and Poulenc "Improvisations."