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  • 简单获取钢琴 88 个键的音高频率值


    procedure TForm1.Button1Click(Sender: TObject);
    var
      i: Integer;
      f: Double;
    begin
      f := 440/2/2/2/2;
      for i := 0 to 87 do
      begin
        Memo1.Lines.Add(Format('%.3f', [f]));
        f := f * 1.0594630944;
      end;
    end;
    
    {*********
    27.500
    29.135
    30.868
    32.703
    34.648
    36.708
    38.891
    41.203
    43.654
    46.249
    48.999
    51.913
    55.000
    58.270
    61.735
    65.406
    69.296
    73.416
    77.782
    82.407
    87.307
    92.499
    97.999
    103.826
    110.000
    116.541
    123.471
    130.813
    138.591
    146.832
    155.563
    164.814
    174.614
    184.997
    195.998
    207.652
    220.000
    233.082
    246.942
    261.626
    277.183
    293.665
    311.127
    329.628
    349.228
    369.994
    391.995
    415.305
    440.000
    466.164
    493.883
    523.251
    554.365
    587.330
    622.254
    659.255
    698.456
    739.989
    783.991
    830.609
    880.000
    932.328
    987.767
    1046.502
    1108.731
    1174.659
    1244.508
    1318.510
    1396.913
    1479.978
    1567.982
    1661.219
    1760.000
    1864.655
    1975.533
    2093.005
    2217.461
    2349.318
    2489.016
    2637.020
    2793.826
    2959.955
    3135.963
    3322.438
    3520.000
    3729.310
    3951.066
    4186.009
    **********}
    

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  • 原文地址:https://www.cnblogs.com/del/p/2080670.html
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