The simple check method is:

1. First, determine whether the A sound of the 49th key from the left (including the black keys) complies with the international standard. You can use a pitch meter or electronic Check with a metronome or a violin flute. After determining, check the interval relationship. Traditional music theory usually divides various scales into four types: perfect consonance, consonance, incomplete consonance and dissonance. In other words, consonance and octave are perfect consonance. , pure fourths, and pure fifths are consonants. Human ears are more inclined to consonance, and the more consonant the intervals, the more accurately they can distinguish them. Therefore, it is easier to check the unison and octave on the piano. If you use an octave, Check the scale of the piano carefully and find that it is not accurate, then it needs to be tuned.

2. The best way is to tune on time, so that the tune will not go out of tune too much during the tuning cycle. You can also ask a piano teacher to help check the intonation.

3. It needs to be emphasized that the maximum interval between piano tunings should not exceed one year. If the piano has not been tuned for many years, it will take several consecutive tunings before it can be tuned correctly, and the strings will easily break.