All given in Hz.
**********************************
f_2Harm_VM =
          991.641
          991.828
          994.803
          995.055
          995.179
          995.463
          997.617
          997.787
          998.019
          998.082
           998.825
          998.967
          1000.065
           1000.298
          1000.309
          1000.428
          1001.839
          1001.935
          1002.855
           1003.1169
          1006.437
          1006.751
          1009.930
          1009.950
          1010.356
          1010.583
          1011.056
          1011.332
           1013.867
          1014.088
          1017.980
          1018.233
    
**********************************
  diff(f_2Harm_VM)
    0.1873
    2.9745
    0.2524
    0.1241
    0.2835
    2.1544
    0.1695
    0.2325
    0.0631
    0.7429
    0.1417
    1.0983
    0.2325
    0.0117
    0.1185
    1.4115
    0.0956
    0.9203
    0.2616
    3.3206
    0.3141
    3.1784
    0.0206
    0.4059
    0.2271
    0.4750
    0.2732
    2.5350
    0.2216
    3.8919
    0.2533
    
**********************************
    max(f_2Harm_VM) - min(f_2Harm_VM)
    26.59