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Phonograph
In 1877 the phonograph was invented so that artists could record themselves and see how they had changed in tone or if the piece they were playing sounded alright -
Radio
In 1901 Guglielmo Marconi was the first person to send radio waves making it more possible for music to become widespread across the world for more enjoyable listening -
Headphones
In the year 1910, the first pair of headphones was created allowing the artist to hear what others would hear from their song and how they would hear it with more clarity -
Jazz popularity
In the 1930s music had changed from classical melodies more toward swing melodies. -
Records
In 1931 RCA-Victor made the first vinyl record for consumers to buy and listen to at home in their own comfort -
Tape recorders
After headphones were invented they had to have something to listen to the music on while they were moving around and that is what the tape recorder was made to allow consumers to be able to listen to music while they were going for a run or anything else -
Stereo
Because of other inventions people had begun to wonder what other ways they could listen to music and that is why the stereo speakers were invented so that consumers could make their music louder -
WWII
During the 1940s WWII was happening and instead of continuing to make music artist had chosen to go and play music for the troops so they could attempt to relax while in tense situations. -
Genre addition
While Jazz was still popular other genres had begun to rise as well such as progressive rock, blues rock, and psychedelic rock -
MTV
Because of MTV music videos had begun to rise in popularity and more could be made for the enjoyment of the music and to add a story to the song