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The ear is very sensitive. The sound you hear varies by the state of the muscle of your shoulder. You can hear the difference by raising your shoulder. It is important to relax your shoulder when you perform your instrument or when you listen to music.耳はとても敏感です。肩の筋肉の状態によって、聞こえ方が変わってしまいます。試しに肩を上げてみると音の違いがわかります。演奏するときも音楽を聴くときも...