For what it is worth: My Deagan tuning fork is inscribed with the words A=440 cps adopted AFofM 1917, US congress 1920. Steve >>> Tom Cole <tcole@cruzio.com> 11/29 6:42 PM >>> james turner wrote: > > Can someone tell me a little of the history about when A-440 was made > standard pitch? Who decided this and what went on? > > Thanks, > > Jim Turner Jim, from the Hahvahd Dictionary of Music: "The present-day standard of pitch is a' = 440 (double) vibrations (cycles) per second. This standard was universally adopted in 1939 by an international conference held in London under the auspices of the International Standards Association. It replaced the old standard of 435 that had been fixed by the Paris Academy in 1859 (diapason normal) and confirmed, under the term "international pitch," at a conference held in Vienna in 1885." Tom -- Thomas A. Cole, RPT Santa Cruz, CA mailto:tcole@cruzio.com
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