The Source

SRC - 440Hz Tuning

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SRC - 440Hz Tuning

Folder: 05 - SOURCE MATERIAL Supporting: 440Hz Tuning

The History — Primary Sources

Alexander Ellis — 1880 “The History of Musical Pitch” Journal of the Society of Arts, March 5, 1880. Documents pitch variation from 374Hz to 567Hz across Europe. Foundational historical source.

Nature Magazine — 1939 G.W.C. Kaye — “International Standard of Concert Pitch” Nature, May 27, 1939. Documents the 1939 London conference. Full delegate list recorded. Confirms: French and Italian representation. Three German delegates — none named Goebbels.

Vern Oliver Knudsen Papers UCLA Library Special Collections Coll. No. 1153, Box 25, Folder 4. Full delegate list from 1939 meeting. Primary document confirming British Standards Institute organised the conference.

ISO 16:1975 International standard for A=440Hz concert pitch. https://www.iso.org/standard/3601.html

Goebbels Claim — Debunked

Lead Stories Fact Check Full investigation with primary sources. Confirms claim is false. https://leadstories.com/hoax-alert/2022/10/fact-check-tuning-standard-of-a-440-hz-was-not-driven-by-nazi-and-rockefeller-desire-for-discord.html

Jerusalem Post — Reuters Investigation Jeffrey Herf (University of Maryland) quote confirming claim is without basis. https://www.jpost.com/international/did-nazis-change-the-universal-music-pitch-to-use-against-their-enemies-675733

Roel’s World — Comprehensive Analysis Documents 440Hz instruments built before Nazi era. Confirms 440Hz was already common before 1933. https://roelsworld.eu/tuning-frequency/goebbels-and-440/

BBC Technical Reason for 440Hz 439Hz is a prime number — difficult to generate electronically. 440Hz chosen for engineering reasons. Referenced in multiple musicological sources.

Verdi and 432Hz

Historical documentation: Giuseppe Verdi formally petitioned the Italian government for A=432Hz as national standard in the 1880s. Documented in musicological literature. Referenced in ProSoundWeb analysis and multiple classical music sources.

The 2019 Physiological Study

Calamassi, D. & Pomponi, G.P. (2019) “Music Tuned to 440 Hz Versus 432 Hz and the Health Effects: A Double-blind Cross-over Pilot Study” Explore (NY). 2019 Nov-Dec;15(6):422-434. PubMed: https://pubmed.ncbi.nlm.nih.gov/31031095/ 33 volunteers. Double-blind. 432Hz: slightly lower heart rate and respiratory rate. Authors note: modest difference, larger replication needed. Tag: credible — not verified

Mathematical Relationships

432Hz mathematical properties:

  • 432 = 12² × 3
  • C at 432Hz tuning = 256Hz = 2⁸
  • Relationship to Schumann Resonance harmonics documented in multiple music theory analyses
  • Pythagorean tuning alignment documented

BBC Symphony Orchestras Note Most professional orchestras tune to 441–443Hz in practice. Historically informed performance groups may use 415Hz or lower. Confirmed by multiple professional music sources.

Still To Source

  • Tibetan singing bowl measurements — peer reviewed archaeoacoustics source needed #investigate
  • Ancient Egyptian/Greek instrument pitch measurements — precision concerns noted, primary archaeoacoustics papers needed investigate
  • Larger replication of Calamassi 2019 study — does not yet exist investigate
  • Schumann Resonance harmonic relationship to 432Hz — mathematical proof needed beyond popular claims investigate

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