audio is an electrical or other representation of sound

Audio TimelineBy: Harli Kilgore

What is Audio?

Audio is an electrical or other representation of sound.

Audio

Audio is Sound, esp. when recorded, transmitted, or reproduced.

1978

The first music is put on record: cornetist Jules Levy plays "Yankee Doodle."

1888

Edison introduces an electric motor-driven phonograph.

1898

Valdemar Poulsen patents his "Telegraphone," recording magnetically on steel wire.

1900

Boston's Symphony Hall opens with the benefit of Wallace Clement Sabine's acoustical advice

1906

Lee DeForest invents the triode vacuum tube, the first electronic signal amplifier

1910

Enrico Caruso is heard in the first live broadcast from the Metropolitan Opera, NYC

1912

Major Edwin F. Armstrong is issued a patent for a regenerative circuit, making radio reception practical.

1916

Edison does live-versus-recorded demonstrations in Carnegie Hall, NYC.

1919

The Radio Corporation of America (RCA) is founded. It is owned in part by United Fruit.

1921

The first commercial AM radio broadcast is made by KDKA, Pittsburgh PA.

1926

O'Neill patents iron oxide-coated paper tape.

1927

The Japan Victor Corporation (JVC) is formed as a subsidiary of the Victor Talking Machine Co

1928

Dr. Georg Neumann founds a company in Germany to manufacture his condenser microphones. Its first product is the Model CMV 3.

1929

Harry Nyquist publishes the mathematical foundation for the sampling theorem basic to all digital audio processing, the "Nyquist Theorem."

1931

Arthur Keller and associates at Bell Labs in New York experiment with a vertical-lateral stereo disk cutter.

1932

The first cardioid ribbon microphone is patented by Dr. Harry F. Olson of RCA, using a field coil instead of a permanent magnet.

1935

BASF prepares the first plastic-based magnetic tapes.

1940

Walt Disney's "Fantasia" is released, with eight-track stereophonic sound.

1941

Arthur Haddy of English Decca devises the first motional feedback, lateral-cut disk recording head, later used to cut their "ffrr" high-fidelity recordings.

1944

Arthur Haddy forms Ampex Corporation to make electric motors for the military.

1946

Brush Development Corp. builds a semiprofessional tape recorder as its Model BK401 Soundmirror.

1947

Ampex produces its first tape recorder, the Model 200

1948

Scotch types 111 and 112 acetate-base tapes are introduced.

1950

IBM develops a commercial magnetic drum memory

1950

Guitarist Les Paul modifies his Ampex 300 with an extra preview head for "Sound-on-Sound" overdubs.

1951

An "Ultra-Linear" amplifier circuit is proposed by Hafler and Keroes

Work Cited Page

http://en.wikipedia.org/wiki/Audio http://dictionary.reference.com/bro

wse/audio?s=t http://www.aes.org/aeshc/docs/aud

io.history.timeline.html