Final answer:
The consumption of music has changed over the last century due to factors like advancements in distribution methods, increased demand from the bourgeois class, and technological advancements in entertainment.
Step-by-step explanation:
The consumption of music has undergone significant changes over the last century. With the invention of the Gutenberg press, music and musical theory became more widely distributed, leading to an increased demand for music as entertainment and for educated amateurs. The emergence of a bourgeois class contributed to this demand. Additionally, advancements in technology, such as the invention of movies and commercial radio, allowed for the mass dissemination of music and the rise of national icons.