Audio Timeline BY: Slyder Welch

Early Times 1878- The first music is put on record, cornets Jules Levy plays "Yankee Doodle”. 1888- Edison introduces an electric motor-driven phonograph. 1895 -Marconi successfully experiments with his wireless telegraphy system in Italy, leading to the first transatlantic signals from Poldhu. 1921-The first commercial AM radio broadcast is made in, Pittsburgh PA.

Early Times 1926-O'Neill patents iron oxide-coated paper tape. 1929- Harry Nyquist publishes the mathematical foundation for the sampling theorem basic to all digital audio processing,. Called the "Nyquist Theorem." 1932- The first cardioids ribbon microphone is patented by Dr. Harry F. Olson of RCA, using a field coil instead of a permanent magnet. 1940 Walt Disney's "Fantasia" is released, with eight- track stereophonic sound.

Middle Times 1943-Altec develops their Model 604 coaxial loudspeaker. 1944- Alexander M. Poniatoff forms Ampex Corporation to construct electric radios for the military. 1945 -Two Magneto phone tape decks are sent back to the U.S. In pieces in multiple mailbags by Army Signal Corps Major John T. Mullin. 1948-The Audio Engineering Society is formed in New York City.

Middle Times 1955- Ampex develops Selective Synchronous Recording, making audio overdubbing practical. 1957 -Westrex demonstrates the first commercial "45/45" stereo cutter head. 1971- Denon demonstrates 18-bit PCM stereo recording using a helical-scan video recorder. RMS and VCA circuit modules introduced by David Blackmer. 1972 -Electro-Voice and CBS are licensed by Peter Scheiber to produce quadraphonic decoders using his patented matrixes.

Late Times 1983- Fiber-optic cable is used for long distance digital audio transmission, linking New York and Washington, D.C. 1984- The Apple Corporation markets the Macintosh computer. 1987- Digitizing markets "Sound Tools," a Macintosh- based digital workstation using DAT as its source and storage medium. 1990- ISDN telephone links are offered for high-end studio use.

Late Times 1994- Yamaha unveils the Pro Mix 01, the first affordable digital multi track console. 1996 Record labels begin to add multimedia files to new releases, calling them "enhanced CDs." Experimental digital recordings are made at 24 bits and 96 kHz. 1999 -Audio DVD Standard 1.0 agreed upon by manufacturers.

Credits Thanks to, http://www.aes.org/aeshc/docs/audio.history.timeline .html I was able to get all of my information. I went onto the website and took facts out of it, but I changed them up, so it would not be considered plagiarism. Thanks for watching and I hope you enjoyed the audio timeline that I have put together! Thank You!