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Milestone-Proposal talk:Improvements in and relating to Sound-transmission, Sound-recording and Sound-reproduction systems by Alan Dower Blumlein

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minor amendment 319:15, 31 October 2014

minor amendment

1. the proposed title 'Invention of Stereo' might be too ambiguous - from the context it clearly refers to stereo SOUND, but the term could also be applied to stereo images and photgraphy, so a title such as 'Invention of Stereo Sound Reproduction' could be more accurate.

2. The answer given to the Section in which the milestone would reside is given as 'Region 8'. The Section is 'UKRI' so this needs correction. Of course, the UKRI Section is in Region 8, but that is not what the proposal form asks about.

Tony Davies 2013 Oct 19th

Tonydavies14:47, 19 October 2013

Change in title now made, thank you.

The Section Chair (just starting two years in office from January 2014, is Dr. Steve Nightingale. I believe that he will gladly provide the needed letter. The Section Treasurer, Nick Wright, also needs to be advised of this proposal.

Tony Davies 2014 Feb 16th

Tonydavies16:42, 16 February 2014

This looks like a good milestone and I endorse it. I have a little problem with the citation since it doesn't really say that any of this technology was new. Is there any way to insert some words like "for the first time" in the citation. As it stands now, a non-technical reader could say, "So? He filed a patent and recorded the Philharmonic".

Feisel18:37, 30 October 2014

The careful and cautious wording in the citation is necessary because there was a simultaneous effort in New York at Bell Labs, by a group including Arthur Keller, I. Rafuse, and their supervisor Harvey Fletcher. They too achieved stereo recording in 1930-1931, and then they set up their equipment at the Academy of Music in Philadelphia, home of the Philadelphia Orchestra and its conductor, Leopold Stokowski, and with Stokowski's cooperation made over 100 recordings of the orchestra over the course of the 1931-1932 season. While many of these recordings were done in wide-range (i.e. high-fidelity_ mono, some were done in stereo. For Details see

Robert McGinn, "Stokowski and the Bell Telephone Laboratories: Collaboration in the Development of High-Fidelity Sound Reproduction" Technology and Cultue Vol. 24 No. 1 (January 1983) 38-75.

Thus, while Blumlein's is a milestone-worthy achievement, claims like " forthe first time" are unjustified. It seems a case of simultaneous invention.

Sheldon Hochheiser

SHH19:15, 31 October 2014