If anything it’s the opposite, opera is the most elitist musical wing of classical music. However in the C18th a sub-genre of opera was developed, called Opera Buffa, which is a sort of light or comic opera. Unlike typical operas, they dealt with current issues, were in the vernacular of the day and were intended for public performance in playhouses and vaudeville theatres rather than opera houses and some were very popular.I think Mozart's operas were the popular music of the 18th century. Opera in general is the "popular music wing" of classical music.
I don’t own that book. However, Wikipedia has a decent article on Pop Music and Wiki’s article on the Phonograph Record is also pertinent.Here's a book on pop music on 78s. http://www.zoism.co.uk/the-great-78s-pop-music-of-the-50s/
There’s no doubt TV had an influence on pop music, the invention of music videos of course and it influenced sales but the jukebox in the 1950’s and then radio had a much bigger influence until later decades (1980’s).Which is around the same time people were buying televisions.
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