In 2008, a piece of black cardboard that had been sealed for 148 years was opened, and American scientists used modern digital technology to decipher the musical waveform recorded on the cardboard: a 10-second French nursery rhyme. This is the earliest recorded sound in human beings.
It was April 9, 1860.
On the same day, Scott, a Parisian typesetter and inventor, placed a needle on a cylinder horn while experimenting with the phonetic descriptor.
As the female singer sang, the vibrating tip of the needle recorded the waveform of the music on the blackened cardboard of the oil lamp.
However, Scott doesn't know how to get the sound out...
In 1857, the French inventor Leon Scott invented the Phonoautograph sound wave vibrator, which only records the shape of the sound wave, and does not have any regeneration device, which can be said to be the originator of the phonograph. In 1877, While studying a simple automatic telegraph relay device, Thomas Alva Edison accidentally built a machine called the Phonograph, which was published and patented in December of that year. This is the first phonograph in human history, made of tin foil drum, steel needle play, but due to the wear, each drum can only play two or three times.
In 1887, Alexander Graham Bell, the "father of the telephone", changed Edison's tin foil roller to a waxed paper drum and played it with a gem needle, so that the noise was much reduced, the number of reuse times increased, and the lifespan was extended, and this improved machine was called the Graphophone. In 1888, Edison improved his Phonograph machine, using a wax drum and replacing the rotation of the hand-cranked drum with a battery-powered motor, increasing the stability of playback, and was listed that year.
In 1888, the German Emile Berliner introduced a machine called the Gramophone, which used a flat circular wax-coated zinc version as a medium for playback and recording, and could also be mastered, greatly increasing the possibility of commercial mass production of records, which is the ancestor of today's circular records. In the early days, the direction of travel of flat circular records was moved from the inside to the outside, which was exactly the opposite of modern records moving from the outside to the inside; the drum recording pattern was up and down, undulating, and shallow, while the flat circular record was left and right parallel shaking to engrave the pattern; this improvement maintained a certain needle pressure, increasing the signal noise ratio and stability.
In 1893, mass production of flat round records began. In 1919 (some say 1924), J. Mark Marthfield of Bell Labs P. Maxfield) and H. Harrison C. Harison) applied electronic amplifiers to phonographs and successfully manufactured electronic phonographs.
In 1935, the General Electric Company in Berlin, Germany, successfully developed a tape recorder using plastic tape. After World War II, the materials used to produce records abandoned the long-standing insect paint and switched to plastic, which was an important factor in the production of dense-grained records and LPs.
In 1948, Peter Goldmark of the CBS laboratory reduced the distance between the grooves of the record and slowed down the recording speed to prolong the playback time of the record, and launched the LP (Long Playing) record, so the speed of the record changed from seventy-eight to sixteen, forty-five, and evolved to thirty-three and one-third of the time it is today. In 1963, the Dutch Philips company developed a cassette tape, due to the advantages of lightness, durability, strong interchangeability and other advantages and has been rapidly developed, the golden age of vinyl records gradually passed, even so, the vitality of vinyl records is still tenacious...