Phonautograph

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An early phonautograph (1859). The barre, for receiving sound, is made of plaster of paris. Phonautograph 1859.jpg
An early phonautograph (1859). The barre, for receiving sound, is made of plaster of paris.
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Au clair de la lune
This 1860 phonautogram by Édouard-Léon Scott de Martinville is the oldest known intelligible recording of the human voice. Played at what is now believed to be the correct speed, [1] it reveals a man's voice, presumably Scott de Martinville's, singing very slowly. The words are "Au clair de la lune, mon ami Pierrot, prête-m—".
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The phonautograph is the earliest known device for recording sound. Previously, tracings had been obtained of the sound-producing vibratory motions of tuning forks and other objects by physical contact with them, but not of actual sound waves as they propagated through air or other mediums. Invented by Frenchman Édouard-Léon Scott de Martinville, it was patented on March 25, 1857. [2] It transcribed sound waves as undulations or other deviations in a line traced on smoke-blackened paper or glass. Scott believed that future technology would allow the traces to be deciphered as a kind of "natural stenography". [3] Intended as a laboratory instrument for the study of acoustics, it was used to visually study and measure the amplitude envelopes and waveforms of speech and other sounds, or to determine the frequency of a given musical pitch by comparison with a simultaneously recorded reference frequency.

Contents

Apparently, it did not occur to anyone before the 1870s that the recordings, called phonautograms, contained enough information about the sound that they could, in theory, be used to recreate it. Because the phonautogram tracing was an insubstantial two-dimensional line, direct physical playback was impossible in any case. However, several phonautograms recorded before 1861 were successfully played as sound in 2008 by optically scanning them and using a computer to process the scans into digital audio files.

Construction

Detail of a phonautogram made in 1859 Phonautogram - Scott 1859.jpg
Detail of a phonautogram made in 1859

The phonautograph was patented on March 25, 1857 by Frenchman Édouard-Léon Scott de Martinville, [4] an editor and typographer of manuscripts at a scientific publishing house in Paris. [5] One day while editing Professor Longet's Traité de Physiologie, he happened upon that customer’s engraved illustration of the anatomy of the human ear, and conceived of "the imprudent idea of photographing the word." In 1853 or 1854 (Scott cited both years) he began working on "le problème de la parole s'écrivant elle-même" ("the problem of speech writing itself"), aiming to build a device that could replicate the function of the human ear. [5] [6]

Scott coated a plate of glass with a thin layer of lampblack. He then took an acoustic trumpet, and at its tapered end affixed a thin membrane that served as the analog to the eardrum. At the center of that membrane, he attached a rigid boar's bristle approximately a centimeter long, placed so that it just grazed the lampblack. As the glass plate was slid horizontally in a well formed groove at a speed of one meter per second, a person would speak into the trumpet, causing the membrane to vibrate and the stylus to trace figures [5] that were scratched into the lampblack. [7] On March 25, 1857, Scott received the French patent [8] #17,897/31,470 for his device, which he called a phonautograph. [9] The earliest known intelligible recorded sound of a human voice was conducted on April 9, 1860 when Scott recorded [7] someone singing the song "Au Clair de la Lune" ("By the Light of the Moon") on the device. [10] However, the device was not designed to play back sounds, [7] [11] as Scott intended for people to read back the tracings, [12] which he called phonautograms. [6] This was not the first time someone had used a device to create direct tracings of the vibrations of sound-producing objects, as tuning forks had been used in this way by English physicist Thomas Young in 1807. [13] By late 1857, with support from the Société d'encouragement pour l'industrie nationale, Scott’s phonautograph was recording sounds with sufficient precision to be adopted by the scientific community, paving the way for the nascent science of acoustics. [6]

The device's true significance in the history of recorded sound was not fully realized prior to March 2008, when it was discovered and resurrected in a Paris patent office by First Sounds, an informal collaborative of American audio historians, recording engineers, and sound archivists founded to make the earliest sound recordings available to the public. The phonautograms were then digitally converted by scientists at the Lawrence Berkeley National Laboratory in California, who were able to play back the recorded sounds, something Scott had never conceived of. Prior to this point, the earliest known record of a human voice was thought to be an 1877 phonograph recording by Thomas Edison. [7] [14] The phonautograph would play a role in the development of the gramophone, whose inventor, Emile Berliner, worked with the phonautograph in the course of developing his own device. [15]

Playback

By mid-April 1877, Charles Cros had realized that a phonautograph recording could be converted back into sound by photoengraving the tracing into a metal surface to create a playable groove, then using a stylus and diaphragm similar to those of the phonautograph to reverse the recording process and recreate the sound. Before he was able to put his ideas into practice, the announcement of Thomas Edison's phonograph, which recorded sound waves by indenting them into a sheet of tinfoil from which they could be played back immediately, temporarily relegated Cros's less direct method to obscurity.[ citation needed ]

Ten years later, the early experiments of Emile Berliner, the creator of the disc Gramophone, employed a recording machine that was in essence a disc form of the phonautograph. It traced a clear sound-modulated spiral line through a thin black coating on a glass disc. The photoengraving method first proposed by Cros was then used to produce a metal disc with a playable groove. Arguably, these circa 1887 experiments by Berliner were the first known reproductions of sound from phonautograph recordings. [16]

However, as far as is known, no attempt was ever made to use this method to play any of the surviving early phonautograms made by Scott de Martinville. Possibly this was because the few images of them generally available in books and periodicals were of unpromising short bursts of sound, of fragmentary areas of longer recordings, or simply too crude and indistinct to encourage such an experiment. [17]

Nearly 150 years after they had been recorded, promising specimens of Scott de Martinville's phonautograms, stored among his papers in France's patent office and at the Académie des Sciences, were located by American audio historians. High-quality images of them were obtained. In 2008, the team played back the recordings as sound for the first time. Modern computer-based image processing methods were used to accomplish the playback. The first results were obtained by using a specialized system developed for optically playing recordings on more conventional media which were too fragile or damaged to be played by traditional means. Later, generally available image-editing and image-to-sound conversion software, requiring only a high-quality scan of the phonautogram and an ordinary personal computer, were found to be sufficient for this application. [18] [19]

For First Sounds' March 2008 release of "Au Clair de la Lune", its engineers wrote software to improve the stability of the sound. It did the same with a May 17, 1860 recording of "Gamme de la Voix" which First Sounds presented at the Audie Engineering Society's convention in late 2008. [20]

Recovered sounds

One phonautogram, created on April 9, 1860, was revealed to be a 20-second recording of the French folk song "Au clair de la lune". [21] It was initially played at double the original recording speed and believed to be the voice of a woman or child. However, further recordings were uncovered accompanied with notes Scott de Martinville made that inadvertently identified himself as the speaker. [22] At the correct speed, the voice of a man, almost certainly Scott de Martinville himself, is heard singing the song very slowly. [1] Also recovered were two 1860 recordings of "Vole, petite abeille" ("Fly, Little Bee"), a lively song from a comic opera. [23] Previously, the earliest known recording of vocal music was an 1888 Edison wax cylinder phonograph recording of a Handel choral concert.

A phonautogram containing the opening lines of Torquato Tasso's pastoral drama Aminta has also been found. Probably recorded in April or May 1860, this phonautogram is the earliest known recording of intelligible spoken words to be played back, [24] [25] predating Frank Lambert's 1878 talking clock recording. Earlier recordings, made in 1857, 1854, and 1853, also contain Scott de Martinville's voice but are unintelligible because of their low quality, brevity and irregularity of speed. [26] Only one of these recordings, 1857 cornet scale recording, was restored and made intelligible. [27]

See also

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References

  1. 1 2 Block, Melissa; Siegel, Robert (June 1, 2009). "Reconsidering Earliest-Known Recording". All Things Considered. NPR. Retrieved February 12, 2022.
  2. ↑ Flatow, Ira (April 4, 2008). "1860 'Phonautograph' Is Earliest Known Recording". Talk of the Nation. NPR. Retrieved September 19, 2017.
  3. ↑ "Edouard-Léon Scott de Martinville: The Phonautograph". National Park Service. Retrieved December 20, 2023.
  4. ↑ "mar 25, 1857 - Phonautograph invented". Time . Archived from the original on June 29, 2022. Retrieved July 13, 2022.
  5. 1 2 3 "Origins of Sound Recording: The Inventors". National Park Service. July 17, 2017. Archived from the original on January 22, 2022. Retrieved July 13, 2022.
  6. 1 2 3 "Édouard-Léon Scott de Martinville". First Sounds. 2008. Archived from the original on July 1, 2022. Retrieved July 13, 2022.
  7. 1 2 3 4 "Oldest recorded voices sing again". BBC News. March 28, 2008. Archived from the original on April 17, 2022. Retrieved July 13, 2022.
  8. ↑ Villafana, Tana (December 20, 2021). "Observing the Slightest Motion: Using Visual Tools to Preserve Sound". Library of Congress. Archived from the original on January 3, 2022. Retrieved July 13, 2022.
  9. ↑ Schoenherr, Steven E. (1999). "Leon Scott and the Phonautograph". University of San Diego. Archived from the original on February 7, 2018. Retrieved July 13, 2022.
  10. ↑ "Sound Recording Predates Edison Phonograph". All Things Considered . March 27, 2008. Archived from the original on May 26, 2022. Retrieved July 13, 2022– via NPR.
  11. ↑ "Origins of Sound Recording: The Inventors". www.nps.gov. 2017. Archived from the original on September 21, 2017.
  12. ↑ Fabry, Merrill (May 1, 2018). "What Was the First Sound Ever Recorded by a Machine?". Time . Archived from the original on June 7, 2022. Retrieved February 13, 2022.
  13. ↑ Nineeenth-century Scientific Instruments. University of California Press. 1983. p. 137. ISBN   9780520051607. Archived from the original on February 15, 2017.
  14. ↑ Rosen, Jody (March 27, 2008). "Researchers Play Tune Recorded Before Edison". The New York Times . Archived from the original on April 13, 2022. Retrieved July 13, 2022.
  15. ↑ "The Gramophone". Library of Congress. Archived from the original on June 1, 2022. Retrieved July 13, 2022.
  16. ↑ Berliner, E: "The Gramophone: Etching the Human Voice", Journal of the Franklin Institute, June 1888 125(6):425–447. Berliner, who scrupulously acknowledges the work of Scott and Cros in this paper, uses the word "phonautogram" (see pages 437 and 438) to describe his own recordings prior to their processing into playable form by photoengraving or direct etching.
  17. ↑ Morton, D., Sound Recording: The Life Story of a Technology, JHU Press, 2006 indicates (see page 3) that this could be the case even when photochemical processes were no longer the only option and optimized results were possible: in 2000, a planned experiment to recover sounds from phonautograms by means of scanning and digital processing was abandoned because there was "little to try to recover" in the specimens at hand.
  18. ↑ FirstSounds.org
  19. ↑ Rosen, Jody (March 27, 2008). "Researchers Play Tune Recorded Before Edison". The New York Times .
  20. ↑ "Retrieving Sound from Soot—Our Evolving Approaches". First Sounds. Archived from the original on March 7, 2023. Retrieved April 20, 2023.
  21. ↑ "Earliest Recordings Ever Made". NoiseAddicts. August 13, 2008. Retrieved September 19, 2017.
  22. ↑ "This Sealed Packet Contained the World's First Recorded Sound (firstsounds.org)". reaktorplayer.wordpress.com. September 21, 2010.
  23. ↑ Feaster, Patrick (2009). ""Vole, Petite Abeille" – Scott's Last Known Phonautograms (1860)". Phonozoic. Retrieved February 12, 2022.
  24. ↑ Feaster, Patrick (2009). "The "Aminta" Phonautogram (1860)". Phonozoic. Retrieved February 12, 2022.
  25. ↑ Cowen, Ron (June 1, 2009). "Earliest Known Sound Recordings Revealed: Researchers Unveil Imprints Made 20 Years Before Edison Invented Phonograph". U.S. News & World Report. Retrieved June 26, 2009.
  26. ↑ Orbin, Joe. Leon Scott's Complete Discography 1853–1860. YouTube. FirstSounds.org. Retrieved March 20, 2019.
  27. ↑ Orbin, Joe. Restored ! 1857 Cornet Scale Recording. YouTube. FirstSounds.org. Retrieved March 20, 2019.

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