* 注意: 「半音」とは、平均律の半音、つまりピアノの半音ということです。
Enter a pair of relative frequencies, with the larger value in the top box. You can enter real values in Hertz, or harmonics: e.g. to find the exact interval between the fourth harmonic and fifth harmonic (a major third in just intonation) enter 5 and 4.
You can also enter a frequency ratio as a single (decimal) value. The 'Calculate' button should not be necessary, except to trigger the calculation on some older browsers.
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