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How to use a hand-cranked music box

Abstract: The music box plays music through the movement. Generally, the ordinary wind-up music box can only play fixed music, which can be played by twisting the spring, while the hand-cranked music box can play music through the paper tape. Musical notation, hand-cranked music with different melodies. The principle of the hand-cranked paper music box is to rotate a thin shaft with a reading needle to read the notes on the paper tape and move the tone teeth to produce sound. When using it, write the staff on the paper tape and punch the holes. Then insert the paper tape into the front hole of the music box and crank it by hand to play music. Let’s learn about the hand-cranked music box. 1. What is the principle of a hand-cranked paper music box

There are two types of music boxes: hand-cranked and wind-up. The wind-up music box can only play fixed tunes, while the hand-crank music box can compose music by yourself. The rocker plays the music composed on the paper tape, so it is also called the paper tape music box. So what is the principle of the paper tape music box?

1. The paper tape music box can recognize the staff on the paper tape. Generally, the musical range on the paper tape spans 2.5 octaves. The horizontal direction is the pitch and the vertical direction is the beat (the space between two solid lines is one beat. Half a beat is between the solid and dashed lines).

2. Draw the staff on a long paper tape, then punch holes, insert the holed paper tape into the paper tape entrance of the music box, and then crank it by hand, the paper tape will be fed in. The movement inside can rotate through a thin shaft with a reading needle, read the notes on the staff on the paper tape, and move the tone teeth to produce sound.

2. How to use a hand-cranked music box

The method of using a hand-cranked music box is very simple. Just hold the handle and shake it. The key is to compose the music on the paper tape:

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1. Draw the staff of the music you want to listen to on the paper tape, and then punch holes.

2. Place the paper tape face up and insert the arrow end into the front hole of the music box (the rocker should be on the right side when facing the hole). Insert it with appropriate force and turn the handle to see if it can drive the paper tape.

3. Turn the rocker clockwise. Since there is a lag from recognition and punching to pronunciation, there will be a few residual sounds at the beginning. The music will start in about 2 seconds.

4. Keep turning the shaker until the music ends. Continue turning the shaker for a few seconds, and the paper tape will eventually slide out of the hole on the back.

3. Precautions for marking notation on a hand-cranked music box

When using a hand-cranked music box, you should pay attention to the notation, that is, the staff on the paper tape. When making the paper tape, you should pay attention to:

1. Pay attention to the adaptation of chords, because when the paper tape is hand-cranked, if a note on a certain pitch appears more than once, corresponding to the paper tape, it means that the sound C appears on the adjacent solid line and dotted line at the same time. hole, then when the first note is read, the following identical notes will be ignored, that is, if a chord is heavy, a certain note will be ignored if it is too frequent.

2. The minimum note interval that can be recognized by the internal movement of the hand-cranked music box is half of the interval between the dotted and solid lines. In other words, if the holes are drilled into the solid and dotted lines, 1/4 can be produced. of notes.