Sound Recording History Phonautograph
Sound recording history it rolls down to the time when people were able to talk,discuss ,sing ,give speech,play instruments but they were never able to record the same but breaking the ice in 1857, Édouard-Léon Scott de Martinville invented the phonautograph, the first device that could record sound waves as they passed through the air. It was intended only for visual study of the recording and could not play back the sound.
Phonautograph
The recording medium was a sheet of soot-coated paper wrapped around a rotating cylinder carried on a threaded rod. A stylus, attached to a diaphragm through a series of levers, traced a line through the soot, creating a graphic record of the motions of the diaphragm as it was minutely propelled back and forth by the audio-frequency variations in air pressure.
Though Edouard -Leon was able to record which was history in itself but was not able to reproduce back or play it back .In 1877 another inventor, Charles Cros, came up with idea that the process could be reversed by using photoengraving to convert the traced line into a groove that would guide the stylus, causing the original stylus vibrations to be recreated, passed on to the linked diaphragm, and sent back into the air as sound but it was able to playback sound of certain frequencies i.e 250 Hz up to about 2,500 Hz .Sound recording history revolves.
