Final answer:
Precomposed music was predominantly used in theatrical performances, courtly settings, and eventually in public concerts and festivals, serving both as entertainment and a crucial cultural element.
Step-by-step explanation:
Precomposed music has historically been used in various settings, a prime example being in the backdrop of theatrical performances to enhance the story's ambiance and bear an emotional impact on the audience. During the 16th century, demand for music grew with the rise of the bourgeois class and the dissemination of chansons, motets, and masses, originally catered to small, upper-class audiences but later evolving into public concerts and large festivals for the middle-class as indicated by Romantic composers. The proliferation of instrumental music, often associated with dance and utilized both in theater and court settings, further exemplifies the variety of contexts in which precomposed music had been predominantly used, serving not only as entertainment but also as a critical cultural element encapsulating the human experience and history.