How did 19th-century performance standards emphasize accuracy, intonation, and evenness?

In the 19th century, the rapid expansion of concert activity and the rise of international reputations for performers led to a significant standardization of musical performance. This shift moved away from the 18th-century focus on individual taste and embellishment toward a rigorous emphasis on clarity, evenness of touch, purity of intonation, and accuracy of execution.1

These standards were supported by several key developments:

• Instrumental Improvements: Mechanical advancements, such as the addition of valves and extra keys to brass and woodwind instruments, made scales more even and intonation more secure. Similarly, innovations in piano construction—including double-escapement action and iron frames—facilitated a crisper, more reliable attack and improved tuning stability.1
• Pedagogical Focus: Successful teaching methods in both vocal and instrumental music began to prioritize virtuosity, brilliance, and evenness, aiming to make performances more effective for the increasingly large audiences of the era.1
• Precise Scoring: As composers’ scores became more detailed, performers’ interpretative freedom was increasingly confined to nuances of technique, tempo, and dynamics, reinforcing the demand for technical precision.1