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PostPosted: December 14th, 2018, 2:19 am 
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http://theconversation.com/how-stereo-w ... lic-103668


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PostPosted: December 14th, 2018, 1:49 pm 
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Joined: July 8th, 2016, 4:34 pm
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Earlier Stereo -

In the 1930s, Harvey Fletcher of Bell Laboratories investigated investigated techniques for stereophonic recording and reproduction. One of the techniques investigated was the ‘Wall of Sound,’ which used an enormous array of microphones hung in a line across the front of an orchestra. Up to eighty microphones were used, and each fed a corresponding loudspeaker, placed in an identical position, in a separate listening room. Several stereophonic test recordings, using two microphones connected to two styli cutting two separate grooves on the same wax disc, were made with Leopold Stokowski and the Philadelphia Orchestra at Philadelphia’s Academy of Music in March 1932. The first, made on March 12, 1932 of Scriabin’s Prometheus: Poem of Fire, is the earliest surviving stereo recording.[11]

Bell Laboratories gave a demonstration of three-channel stereophonic sound on April 27, 1933 with a live transmission of the Philadelphia Orchestra from Philadelphia to Constitution Hall in Washington, D.C. Leopold Stokowski, normally the orchestra’s conductor, was present in Constitution Hall to control the sound mix. Bell Labs also demonstrated binaural sound, using a dummy with microphones instead of ears, at the Chicago World’s Fair in 1933.[12] Two stereophonic recording methods, using two channels and coincident microphone techniques (X-Y with bidirectional transducers / Blumlein-setup & M/S-stereophony), were developed by Alan Blumlein at EMI in 1931 and patented in 1933. A stereo disc, using the two walls of the groove at right angles to carry the two channels, was cut at EMI in 1933, twenty-five years before that method became the standard for stereo phonograph discs.


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PostPosted: December 15th, 2018, 11:38 am 
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Joined: July 24th, 2015, 4:17 pm
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brombo wrote:
Earlier Stereo -

In the 1930s, Harvey Fletcher of Bell Laboratories investigated investigated techniques for stereophonic recording and reproduction. One of the techniques investigated was the ‘Wall of Sound,’ which used an enormous array of microphones hung in a line across the front of an orchestra. Up to eighty microphones were used, and each fed a corresponding loudspeaker, placed in an identical position, in a separate listening room. Several stereophonic test recordings, using two microphones connected to two styli cutting two separate grooves on the same wax disc, were made with Leopold Stokowski and the Philadelphia Orchestra at Philadelphia’s Academy of Music in March 1932. The first, made on March 12, 1932 of Scriabin’s Prometheus: Poem of Fire, is the earliest surviving stereo recording.[11]

Bell Laboratories gave a demonstration of three-channel stereophonic sound on April 27, 1933 with a live transmission of the Philadelphia Orchestra from Philadelphia to Constitution Hall in Washington, D.C. Leopold Stokowski, normally the orchestra’s conductor, was present in Constitution Hall to control the sound mix. Bell Labs also demonstrated binaural sound, using a dummy with microphones instead of ears, at the Chicago World’s Fair in 1933.[12] Two stereophonic recording methods, using two channels and coincident microphone techniques (X-Y with bidirectional transducers / Blumlein-setup & M/S-stereophony), were developed by Alan Blumlein at EMI in 1931 and patented in 1933. A stereo disc, using the two walls of the groove at right angles to carry the two channels, was cut at EMI in 1933, twenty-five years before that method became the standard for stereo phonograph discs.


And yet the LP lives on and thrives as a serious medium. YAY!!! :obscene-drinkingcheers:

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