For a true erhu lover, the erhu is equivalent to his life, which is closely integrated with him and slowly forms a kind of momentum. But time and accidents will damage the erhu, and it will no longer be able to play its former flavor. Now let's talk about some precautions for the maintenance of erhu.

【Piano skin】

The way to determine whether the piano skin is too thick or too thin is to face the skin to the bright place. If the piano skin is very dark and almost impermeable to light when viewed from the barrel, the skin is thick. On the contrary, it is too thin. If the skin is too thick, it will affect the good vibration of the resonance body, making the tone dark and woody, and the volume will be lower.

Solution for excessive thickness: At this time, you can remove the piano tube, use a flat-headed wooden stick, wrap a layer of fine water sandpaper on it, dip it in a small amount of water, put it into the piano tube, and gently follow the python skin fibers from top to bottom. Ground the back of the piano leather. Pay attention to the light inspection while grinding, and make sure that the thickness of the piano skin is uniform and moderate. After grinding, wipe off the powder with a cloth, and then apply a thin layer of vegetable oil with a cotton swab.

Solution for too thin: remove the piano barrel, use a cotton swab dipped in the melted wax to apply it to the back of the piano skin while it is still hot, and control the thickness of the wax layer when applying. After painting, bake the front of the piano skin on a small fire, and then lay it flat for a while to make the wax layer evenly distributed. When baking, keep moving the piano barrel to avoid burning out due to overheating locally. If the wax layer is too thick, you can use a flat knife to gently scrape off a layer, and then bake it again; if the wax layer is not thick enough, Can be repainted according to law.

Moisture-proof solution: place the desiccant (generally sold in supermarkets) in the place where the erhu box is close to the piano barrel to absorb moisture.

Anti-insect solution: It is recommended to wash your hands before every time you play the piano. It is better not to have food around when you are playing the piano or when you put the piano temporarily. It is best to use a clean soft cloth to remove the skin and the piano after every time you play the piano. If the rosin on the piano barrel is not removed in time, it may not be able to go out for a long time, especially if too much rosin is stained on the piano skin, it will also affect the pronunciation. If the piano is not used for a long time, it is best to put a mothball in the piano box. If it is not packaged, you can wrap it with cloth and put it in the piano box.

Anti-vibration solution: pay more attention and put it back in the piano in time.

【Piano tube, piano rod】

When it is humid, you should put one or two bags of moisture absorbent in the piano box; when the climate is too dry, you can wrap a sponge with an appropriate amount of water in plastic film, and then use a needle to poke some small holes and put it in the piano box. in the piano case to increase humidity. In dry areas, a thin coat of vegetable oil can often be applied to the barrel and stem to prevent cracking.

After each use of the erhu, use a soft cloth to clean the rosin powder on the barrel and stem, and put it in the barrel or cover instead of hanging it on the wall. In the cold winter, after taking the piano from the outside into the room, do not open the piano box immediately, but wait for 20 to 30 minutes before opening it, so as not to condense a layer of small water droplets on the body of the piano, which will affect the sound quality of the instrument due to moisture.

【Piano Code】

The bridge is an important conductive component, which has a great influence on the sound quality of the erhu. Every erhu should be said to choose a suitable horse for it, which needs to be determined after many trials. Erhu Mazi is made of maple, ebony, red sandalwood, mahogany, pine knot, bamboo, pencil, paper roll, etc.; in shape, there are oval bottom, round bottom, bridge, etc. Generally speaking, The sound of the new piano is sharper, and it is better to use a horse with a soft texture, a larger bottom area and a lower height; the old piano has a dull sound, and a horse with a hard texture, a smaller bottom area and a higher height should be used to avoid the high handle position. When the strings touch the leather surface. Commercially available bridges are generally semi-finished products that need to be properly trimmed before they can be used. Readers can trim it as follows:

1. Adjust the height. Alternately sand the top and bottom of the bridge with fine-grit sandpaper, so that the hole of the bridge remains in the middle position. until the height is suitable.

2, the whole hole. If the pronunciation of the erhu itself is dull, you can use a small round to expand the small hole of the Qinma. If the erhu pronunciation is sharper, you should choose a qinma with a big hole at the bottom.

3. Grinding the bottom. Put more than ten layers of cloth under the fine sandpaper, and then grind the bottom surface of the bridge into a slightly convex shape on the sandpaper to make it more closely in contact with the leather surface.

4, open the string groove. Install the bridge on the erhu, adjust it to a suitable string spacing, and then use it to press the strings on the horse to leave two indentations on the bridge, and then remove it and use a knife to carve two "V"-shaped Chord groove.

5. Positioning. Look carefully at the bridge, use the higher side as the inner string side, and mark a small dot with a pen. In future use, the side with the dots is always designated as the inner chord side.

【One thousand pounds】

When using, be sure to put a small soft pad on the metal string hook, such as the valve core of the bicycle, deerskin, etc., which can not only beautify the sound quality, but also prevent the string skin from being worn. If you do not use fixed gold and use movable jins, in order to overcome the running string, you can cut a piece of medical tape with a width of about 0.5 cm and stick it on the piano rod in advance, so that the movable jins are relatively fixed. As a professional performer, the height and width of Qianjin should be kept in a stable state for a long time, which is conducive to the mastery of intonation and the cultivation of erhu sound quality.

【chord】

Worm-gear mechanical shaft: You can drop a few drops of sewing oil from the winding wheel every time you change the string, and rotate the shaft handle for a few weeks, which can prevent the gear from being repeatedly stressed and worn.

Screw-type mechanical shaft: When changing the strings, the screw should be loosened and pulled out, and an appropriate amount of oil should be applied to the screw. When winding, do not pull to the same tightness every time, but sometimes it is tighter and sometimes looser, so that the screws on the lead screw are alternately stressed to avoid local wear.

Wooden shaft: If it is often loose, you can sprinkle some rosin powder in the shaft hole to increase the friction; if the shaft is too tight, you can sprinkle some talcum powder in the shaft hole, that is, it can rotate freely.

【Bow】

The bow of the erhu is one of the most worn out parts of the erhu, so you must be careful.

When using, do not contaminate oil or food. If it is stained, you can remove the bow, wash it with soap and water, dry it, and use it again with rosin.

After use, the bow cannot be completely loosened, which will easily cause the bow hair to be messy and easily broken. Also pay attention to the rosin to the bow frequently. Rosin should also have a degree, a trick to choose from the usual experience. If the erhu is not used for a long time, it should be stored in a sanitary ball to prevent insect bites.

The above are some maintenance precautions and tips when using and after using the erhu. I hope that all erhu lovers can use the erhu for a long time, so that you will feel the tranquility of ecstasy and play a more beautiful movement. Erhu should be protected, and momentum should be maintained.

Note: There are many methods in this article, you need to have some experience in making erhu before you can try it. Especially the transformation of snake skin.