Side note: the audio-course mentioned in the article (https://www.audible.com/pd/How-to-Listen-to-and-Understand-Great-Music-3rd-Edition-Audiobook/B00DDVQIM2 ht

Side note: the audio-course mentioned in the article (https://www.audible.com/pd/How-to-Listen-to-and-Understand-Great-Music-3rd-Edition-Audiobook/B00DDVQIM2 https://www.audible.com/pd/How-to-Listen-to-and-Understand-G...) is probably the best Teaching Company courses I've ever heard (and I heard a bunch) and is highly recommended to anyone. I wasn't a big aficionado of classical music and opera before, and I am still not an opera regular now, but it expanded my education about what happened in that world and where things come from immensely. And Robert Greenberg's presentation is just excellent.