How A440 Won America
18:32–19:27 · 55s
Fanny outlines John Deagan’s push for A440 and suggests a market motive: by making the American pitch standard, he could lock out European competitors.
18:32–19:27 · 55s
Fanny outlines John Deagan’s push for A440 and suggests a market motive: by making the American pitch standard, he could lock out European competitors.
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