A set of silver tuning forks used for calibrating pitch and exploring resonance.
Music Tuning and Harmonics

Music Tuning and Harmonics: 432 Hz, Overtones, and the Search for Deeper Resonance

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Discover the real story behind 432 Hz, 440 Hz, and Solfeggio tones, and meet the researchers and musicians who’ve spent their lives exploring tuning and harmonics.