| History
You will find references to the frequency of the note A interspersed in
the following timeline.  These are included because understanding how
the reference frequency has changed over time allows a greater
understanding of modifications to the flute scale.
 
| Year | Milestone | Contributor |  
        | 1340 | Early one-piece wooden flutes appear in drawings. | webmaster |  
        | 1500 | Medieval and Renaissance flute have cylindrical bore design. | webmaster |  
        | 1650 | A=392-415 Hz (Baroque instruments) | webmaster |  
        | 1670 | Baroque three-piece 1-key conical bore flute becomes popular. | webmaster |  
        | 1722 | Tuning cork added. | webmaster |  
        | 1751 | A=422.5 Hz (Handel's tuning fork). | webmaster |  
        | 1760 | Multiple keys added. | webmaster |  
        | 1780 | A=421.6 Hz (Mozart). | webmaster |  
        | 1780 | Classical 4 to 8-key flutes become popular. | webmaster |  
        | 1810 | Bhm experiments with early modern flute models. | webmaster |  
        | 1820 | A=433 Hz (London Philharmonic). | webmaster |  
        | 1821 | Rudall & Rose start making 8-keyed flutes. | webmaster |  
        | 1822 | Nicholson flutes with larger finger holes for greater projection. | webmaster |  
        | 1831 | Bhm system flute appears with keys, springs, and pads. | webmaster |  
        | 1834 | A=440.2 Hz (Congress of Physicists, Stuttgart). | webmaster |  
        | 1850 | Bhm flute becomes popular. | webmaster |  
        | 1852 | A=452.5 Hz (London Philharmonic). | webmaster |  
        | 1879 | A=454.7 Hz (Steinway & Sons Tuning Fork). | webmaster |  
        | 1937 | A=440 Hz (International Conference, Standard Pitch). | webmaster |  
        | 1987 | A=440 Hz (Confirmed as International Standard). | webmaster |  |  
 
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