Register it has several key, and adjustable Hertz.. Is the frequency, the air is also very simple, there are several block,, C said, twelve law of averages, B is worth is beth, G is the guitar, and V is a violin, frequency modulation to 440 hz is the international standard pronunciation, and drop the B, half/half tone #, understand some music theory all can see,, the manual has speaking,, just like the adjustable electronic watch as simple, tuning, when clip to guitar strength is OK ah, try a few times, I believe you can do it
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