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Premium · Discover Coming soon
Ancient questions. Measured answers.
Interactive lessons on the science behind sound’s mysteries: Pythagoras’ whole-number ratios and the comma that breaks them,
the lines in Chladni’s sand, why two close notes beat, and what the evidence says about 432 Hz. Every lesson shows its
equations, cites its sources and ends with what the model leaves out.
Premium also adds full-length video export and live listening, in the native app for Mac, iPhone and iPad.
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$4.99 a month, $39 a year or $89 once, as an in-app purchase. See pricing
Illustration · The Pythagorean comma(3/2)¹² ÷ 2⁷ = 1.0136, or 23.46 cents