How did more detailed musical scores limit performers' interpretive choices in the 19th century?

In the 19th century, the increasing precision of musical notation significantly narrowed the scope of a performer's interpretive freedom. As composers began to provide more detailed instructions within their scores, the performer's role shifted away from the 18th-century tradition—where they were expected to improvise ornamental figuration and modify rhythms—toward a focus on accuracy, clarity, and technical execution.12

Because scores became increasingly explicit, performers' interpretive choices were largely confined to matters of technique, tempo, and rhythmic or dynamic nuance. This transition was driven by a desire for standardized performance practices, which were further reinforced by the rise of professional music critics and the growth of large-scale concert activity.1

While this standardization limited traditional improvisational practices, it also allowed for a new form of "subjectivism" in performance, justified by the 19th-century cult of Romantic genius. Performers were still expected to bring personal expression to the music, but they did so within the framework of increasingly rigid and comprehensive scores, rather than through the spontaneous creation of notes or structural changes that had characterized earlier eras.12