| Also: a tuning fork, the basic, humble tool which makes a full orchestra to play "in tune" is - as applied math and acoustic, a sort-of interpretation of Nature and its Laws - giving 440 cycles (hertz) flat to the trained musician ear, who filters the pure tone as "the officially accepted" tuning pitch, by convention... The diapason (tuning fork) is not something abstract, but a vibrating steel bent bar, producing an A=a note... now at 440 hz, centuries ago at 415 hz, tomorrow... who know? |
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