Before the late 19th century, the access to the enjoyment of music was limited to those with the means to attend live music performances. Only the most wealthy could bring music into their living quarters by hosting salons. Compositions were printed on sheet music so that others could replicate those performances.
In the late 19th century, the phonograph was invented, eventually broadcasting audio content to the masses. More people than before could now bring music into their living environments. Phonograph records enabled a small collection of pieces to be replayed. When the term "disc jockey" was coined in 1935, the world got introduced to what would eventually become a new way of producing music, spawning new music genres and industries.
In the late 20th century, we saw the next big leap in music consumption. Products like the iPod and iTunes further democratized the enjoyment of music as people carried entire music libraries in their pockets and could listen on the go. Today we have software like Spotify that makes our access to music virtually limitless. Software like Garage Band also further democratized music production.
What's the next revolution that would make music consumption even more accessible and birth new ways of creating music?