Final answer:
The incorrect statement about Baroque-era keyboard music is that keyboard players were not expected to improvise, (option c) as improvisation was in fact a significant aspect of Baroque performance practice.
Step-by-step explanation:
The statement that is NOT true about Baroque-era keyboards and the performance of keyboard music is: 'Keyboard players in the Baroque era were not expected to improvise.' On the contrary, improvisation was a common and highly-regarded skill among keyboard players of the time. Technical advances in keyboard instruments encouraged musicians to develop their technique, and these improvements resulted in a richer keyboard repertoire. Additionally, the interaction between musicians and instrument builders fostered innovation, pushing instrument builders to new heights as they responded to the creative demands of the performers.
Improvisation was particularly significant in the performance of basso continuo, a practice where musicians were expected to flesh out harmonies based on a notated bass line. This required a deep understanding of harmony and a level of spontaneity and creativity from the performer. Therefore, the idea that keyboard players were not expected to improvise is incorrect as it neglects the valued role of improvisation in the Baroque keyboard tradition.