Final answer:
Reproduction piano rolls recorded a live pianist's performance, capturing the changes of tempo, and were produced purely for listening.
Step-by-step explanation:
The type of piano rolls that recorded a live pianist to capture the changes of tempo and were produced purely for listening are called reproduction piano rolls. These piano rolls were created by recording an actual pianist playing a particular piece, capturing not only the notes but also the nuances of the performance including changes in tempo, dynamics, and expression.
Reproduction piano rolls were produced in the early 20th century and allowed people to enjoy the performances of famous pianists in their own homes. They were made by companies such as Ampico and Duo-Art, who employed skilled pianists to play and record various pieces.
These rolls were highly accurate and provided a faithful representation of the original performance. They were played on player pianos, which could reproduce the recorded piano rolls with precision, allowing people to listen to the music as if they were hearing the original pianist play.