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From MAKOTO OKABE:
Calculate the frequency of the perfect fifth on the basis of the frequency of the A, TuningToneForViolin synthesizes sine, triangle, sawtooth.I assume that you are such usage of the pitch pipe.The layout is easy to operate, even while holding a musical instrument.I think for other frequencies does not include pure sine wave, swell of sound of double-stop shifted even a beginner is felt, and can be tuning well.G Sound of the sine wave so difficult to hear in the built-in speaker, please try "octave" the (sin wave).