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Before 1939, most Western music was tuned to 432 Hz - a frequency that appears throughout nature. You'll find this exact mathematical pattern in the spiral of seashells, the orbit of planets, and even your own DNA. When the global music standard shifted to 440 Hz, we lost touch with this natural resonance. Many musicians and sound therapi
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Awful customer support!
Geoffrey · May 25, 2026
A sturdy tuning fork with a nice tone mixes well with my other tuning forks
DeeAnne · April 28, 2026
They arrived in a timely manner. Quality as shown and above expected. I've been using them every other day for about a week and have improved sleep and overall calm.