In 1877, Thomas Edison invented the phonograph, the first device that could reproduce pre-recorded sounds. Before this, the only exposure people had to music was live, either in a recital hall or at home in a chamber music setting.
By the time I hit 17, I had no clue what I wanted to be when I "grew up." My focus was simply on graduating high school, going onto college, and then perhaps becoming a film critic. Good luck with that, past self.