Gramophone is a primitive playback equipment, acoustic methods of the sound is stored in records (disc) engraved on the surface in the radial Groove. Records on the turntable, rotating under the needle. Phonograph record can easily replicate, playing time is longer than that of most of the tube-shaped recording medium, therefore, the phonograph is known as one of Edison's greatest invention.
Electric equipment used to broadcast CDs. By United States inventor Edison.