Edison and his phonograph

Edison had invented Phonograph A phonograph, later called a gramophone, and since the 1940s a record player, or more recently a turntable, is a device for the mechanical and analogue reproduction of sound. , a precursor to modern day music player and phone, but he not could get the proper utility value of his invention immediately. I came across this paragraph in a book called, "Guns, Germs and Steel" and felt compelled to note it down.