Title: Phonograph
Content:  Thomas Edison conceived the principle of recording and reproducing sound between May and July 1877 as a byproduct of his efforts to "play back" recorded telegraph messages and to automate speech sounds for transmission by telephone. His first experiments were with waxed paper. He announced his invention of the first phonograph, a device for recording and replaying sound, on November 21, 1877 (early reports appear in Scientific American and several newspapers in the beginning of November, and an even earlier announcement of Edison working on a 'talking-machine' can be found in the Chicago Daily Tribune on May 9), and he demonstrated the device for the first 
Title: Sound recording and reproduction
Content:  The first device that could record actual sounds as they passed through the air (but could not play them back—the purpose was only visual study) was the phonautograph, patented in 1857 by Parisian inventor Édouard-Léon Scott de Martinville. The earliest known recordings of the human voice are phonautograph recordings, called phonautograms, made in 1857. They consist of sheets of paper with sound-wave-modulated white lines created by a vibrating stylus that cut through a coating of soot as the paper was passed under it. An 1860 phonautogram of Au Clair de la Lune, a French folk song, was played back as sound for the first time in 2008 by scanning it and using software to convert the undulating line, which graphically encoded the sound, into a corresponding digital audio file.
Title: Emile Berliner
Content:  the discovery of the phonograph principle by indenting tin-foil or wax, Charles Cros, of Paris, had conceived and placed on file the theory that if the curvilinear record of a Scott Phonautograph be photo-engraved, and such an engraving be made to act again on a stylus attached to a diaphragm, the original sound would be reproduced with absolute accuracy. This was the first conception of a sound-reproducing machine. Cros, however, did not put this idea into practical operation, presumably on account of the many technical difficulties which had to be overcome in order to accomplish it. Emile Berliner undertook to reproduce the human voice on 
Title: Phonograph
Content:  Several inventors devised machines to record sound prior to Thomas Edison's phonograph, Edison being the first to invent a device that could both record and reproduce sound. The phonograph's predecessors include Édouard-Léon Scott de Martinville's phonautograph, and Charles Cros's paleophone. Recordings made with the phonautograph were intended to be visual representations of the sound, but were never sonically reproduced until 2008. Cros's paleophone was intended to both record and reproduce sound but had not been developed beyond a basic concept at the time of Edison's successful demonstration of the phonograph in 1877.
Title: Music technology (electric)
Content:  The first device that could record actual sounds as they passed through the air (but could not play them back—the purpose was only visual study) was the phonautograph, patented in 1857 by Parisian inventor Édouard-Léon Scott de Martinville. The earliest known recordings of the human voice are phonautograph recordings, called "phonautograms", made in 1857. They consist of sheets of paper with sound-wave-modulated white lines created by a vibrating stylus that cut through a coating of soot as the paper was passed under it.
Title: Sound recording and reproduction
Content:  On April 30, 1877, French poet, humorous writer and inventor Charles Cros submitted a sealed envelope containing a letter to the Academy of Sciences in Paris fully explaining his proposed method, called the paleophone. Though no trace of a working paleophone was ever found, Cros is remembered by historians as the earliest inventor of a sound recording and reproduction machine. The first practical sound recording and reproduction device was the mechanical phonograph cylinder, invented by Thomas Edison in 1877 and patented in 1878. The invention soon spread across the globe and over the next two decades the commercial recording, distribution, and sale of sound recordings became a growing new international industry, with the most popular titles selling millions of units by the early 1900s. The development of mass-production techniques enabled cylinder recordings to become a major new consumer item in industrial countries and the cylinder was the main consumer format from the late 1880s until around 1910.
Title: North American Phonograph Company
Content:  Thomas Edison successfully demonstrated sound recording and reproduction in late 1877 with the tinfoil phonograph. The invention caught the public's attention but its practical utility was limited due to low-fidelity and its single-use nature. Edison sold the rights to the phonograph to the Edison Speaking Phonograph Company in 1878 and shifted his focus to the development of electric light. Between 1880 and 1885, Alexander Graham Bell and his associates at the Volta Laboratory experimented with a variety of processes for improved sound recording. They eventually settled on a recording process based on cutting wax cylinders. On January 6, 1886, the associates formed the Volta Graphophone company and were awarded a patent on their wax cylinder process. Later in the year, Edison resumed research on the phonograph. On March 28, 1887, the Volta associates established the American Graphophone Company for the manufacturing and sale of graphophones, and Edison organized the Edison Phonograph Company in the following year to protect his new research in sound.
Title: Phonograph
Content:  Alexander Graham Bell and his two associates took Edison's tinfoil phonograph and modified it considerably to make it reproduce sound from wax instead of tinfoil. They began their work at Bell's Volta Laboratory in Washington, D. C., in 1879, and continued until they were granted basic patents in 1886 for recording in wax. Although Edison had invented the phonograph in 1877 the fame bestowed on him for this invention was not due to its efficiency. Recording with his tinfoil phonograph was too difficult to be practical, as the tinfoil tore easily, and even when the stylus was properly adjusted, its reproduction of sound was distorted, and good for only a few playbacks; nevertheless Edison had discovered the idea of sound recording. However immediately after his discovery he did not improve it, allegedly because of an agreement to spend the next five years developing the New York City electric light and power system.
Title: Dictation machine
Content:  Alexander Graham Bell and his two associates took Edison's tinfoil phonograph and modified it considerably to make it reproduce sound from wax instead of tinfoil. They began their work at Bell's Volta Laboratory in Washington, D.C.In 1879, and continued until they were granted basic patents in 1886 for recording in wax. Thomas A. Edison had invented the phonograph in 1877, but the fame bestowed on him for this invention — sometimes called his most original — was not due to its efficiency. Recording with his tinfoil phonograph was too difficult to be practical, as the tinfoil tore easily, and even when the stylus was 
Title: Phonograph
Content:  Charles Cros, a French poet and amateur scientist, is the first person known to have made the conceptual leap from recording sound as a traced line to the theoretical possibility of reproducing the sound from the tracing and then to devising a definite method for accomplishing the reproduction. On April 30, 1877, he deposited a sealed envelope containing a summary of his ideas with the French Academy of Sciences, a standard procedure used by scientists and inventors to establish priority of conception of unpublished ideas in the event of any later dispute. Cros proposed the use of photoengraving, a process already in use to make metal printing plates from 

Question: who made possible the first reproduction of the human voice on the phonograph?
Answer: Thomas Alva Edison.
Thomas Edison.