Sound is a tricky thing to record. While the first photo was taken in 1826, it wasn't until 1860 that the first audio recording was made. Edouard-Léon Scott de Martinville was the man responsible for inventing the phonautograph, the first invention to be able to record audio. While Scott’s phonautograph could record audio, it wasn’t able to play it back. It wasn’t until 17 years later when Thomas Edison invented the phonograph that audio could not only be recorded, but played back as well. “On the first audio recording Edison recited, ‘Mary had a little lamb. Its fleece was white as snow. And everywhere that Mary went, the lamb was sure to go.’ [Video]  Edison recordings were made on tin foil and could sustain replaying only a few times” (National Museum of American History, 2012). Recording on the phonograph worked by using a stylus and a groove based system. In the early days of audio recording, a rotating tinfoil cylinder and a needle attached to a membrane were used to record pressure waves. The needle left with a groove that represents the amplitude of pressure over time. This could then be played back by using a needle attached to an amplifier. By rotating the cylinder audio would be played back. The same concept holds true for modern day record players, with the addition of a second channel.  Rather than being a groove with only up and down movement, vinyl records instead use a groove that is “V-shaped, and each side of the groove ‘wall’ carries one of the stereo signals. The right channel is carried by the side closest to the outside of the record, and the left is carried by the inside wall” (Yamaha, 2021). Other analog ways of recording include the magnetic tape recording. Invented in 1928 by Dr. S. J. Begun in Germany, the magnetic tape recorder uses “record” magnets to convert electrical signals from a microphone onto a piece of magnetic tape. The tape can then be read by a “play” magnet that converts the magnetic imprints into an electrical signal which can then be amplified.