During which era did many people consider newer styles of music to be outrageous?

Twentieth century also called "Roaring Twenties".

Explanation:

During the twentieth century, many people considered newer styles of music to be outrageous because Jazz, country and pop music were different from what music was before. Some people were accustomed to classical music.  Companies began producing musical instruments such as the piano, guitar, banjo, harmonica, and saxophone.

dc was afraid of these new companies because they may take their customers away due to them being more better or something else.