Because the post on music discovery is one of our most popular articles ever, I thought this beautiful infographic from IndigoBoom would be of interest. Selling music beyond first became possible in 1877 with the introduction of the phonograph cylinder. Since then media formats have developed and radically changed the way we listen, and recently even where we can listen to music. They have looked at the last 30 years of music format development and popularity in the IG below:

Music media, from vinyl to bitstream