Teacher Peng Shuguang’s experience in choosing Erhu

2007-04-16 09:59 Read (2734) Comments (5)

How to choose Erhu? A permanent topic among friends. Over the years, there have been many opinions, long and short, which always leaves people with the feeling of looking at the flowers in the fog. I often meet masters who have been playing the piano for decades, and famous teachers who have been making pianos for decades. They know what is happening but do not know why. It seems that when choosing a piano, you generally need to master some knowledge of acoustics, materials science, mechanics, aesthetics, mathematics and mechanics, as well as the basics of erhu playing, so that you can be more confident when choosing a piano. I would like to share my many years of personal experience in choosing an erhu as follows:

1. When choosing an erhu, pay attention to the focus area of ??the erhu’s ***ringing*vibration

As the saying goes, a good erhu must be able to “tie up” the sound. ", which means that the vibrating sound of the Erhu piano tube must form a concentrated focus, otherwise

the sound will be scattered and lackluster, with empty high notes and thin bass. After the piano skin vibrates and sounds, it focuses back along the bell mouth of the barrel into a pyramid-shaped area. The length of this area changes according to the slope of the bell mouth, coupled with the reflection of the sound groove (elliptical piano does not have Sound groove) is the key to adjusting the balance of high and low sounds in Erhu. The treble area (i.e., the lower handle) has a louder volume and solid sound quality when the primary vibration focus area moves forward; when the primary vibration focus area moves backward, the volume is small and the sound quality is thin. Its low range (i.e. the upper position) is just the opposite. In order to balance the high and low sounds, the vibration focus area must be in a reasonable position. Experience has proven that it is better for the vibration focus to be a little behind the central axis of the piano rod. The simple way to determine the focus area of ??the piano vibration is: when trying to play the piano, your left hand feels a sense of vibration through the piano rod, headstock, and piano base, which indicates that the focus of the piano vibration falls exactly on the central axis of the piano rod. on, and the focus area can also be heard based on experience.

2. Pay attention to the "broken penny effect" when choosing Erhu

When a penny is intact, its sound is "dang-dang" when struck. Once a section or tip appears in the middle, When knocking cracks, etc., the whole pennies will make a "hissing" sound. This is the "penny-breaking effect" in which the cracks, etc. are vibrated by the guided vibration and spread to the whole pennies. Erhu's "penny-breaking effect" has so far been ignored and not noticed. During the production process of the erhu, there will inevitably be some natural and man-made gaps in the materials and structure. If they are neglected and not handled properly, the "penny-breaking effect" will easily occur. I once experienced a good piano. It was made of excellent materials and workmanship. Generally, the sound quality is very good. However, in the dead of night when there is no noise interference, you will vaguely hear a subtle sound on the D tail of the outer string. "His" noise. I couldn't find the cause for a long time. Then I removed the support plate and used a magnifying glass to find a small air-drying crack on the edge of the piano barrel (old materials are easy to produce). Use a little high-penetration 502 glue to eliminate immediately. The "Penny-breaking Effect" generally does not occur at the origin. After it is transferred with the guided vibration, it appears in the tail sound of Erhu, and it does not appear in all the sounds. Sometimes the first vibration of a certain audio frequency guide vibration of Erhu just triggers the "Penny-breaking Effect" ". Selection method: 1. Pull the open string and put your ear against the piano rod to listen, and you can hear obvious noise; 2. Listen to every sound carefully and check every point of the production of the material. In this way, you can avoid mistakenly selecting an erhu with the "penny-breaking effect".

3. When choosing Erhu, pay attention to the inaccurate pronunciation in a certain audio frequency.

This is a common and frequently-occurring disease, and it is more common on high-end instruments with thick and tight skins. See. When playing the piano, one or several notes often appear to be obviously false, producing an effect similar to overtones. Some people mistakenly think that the bow is slipping. This is mainly because the vibration of the piano barrel and the piano skin is at a certain point. If the audio is not well coordinated, it will not produce a buzzing sound. Some symptoms can be relieved and disappeared after playing for a period of time, while others cannot. Note: 1. The piano skin should be thick and even, 2. The inner wall of the piano barrel should be smooth and symmetrical, with smooth and consistent arcs.

4. When choosing Erhu, pay attention to its expressiveness

Expressiveness is the essence of Erhu. Generally speaking, the expressiveness of the erhu is reflected in two aspects: first, the sensitivity and comfort of the erhu. It is required to be responsive, the bow will ring (sound) when it touches the strings, the sound quality is pure and full, not sloppy and tired; the piano should feel comfortable in the hand, giving the player a sense of intimacy like a bird clinging to a human, stimulating the excitement of playing. The second is the controllability and potential of Erhu.

The piano can perform and play freely according to the player's wishes, and the strong playing will not "explode", the weak playing will not "empty", the high notes will not "howl", and the bass will not "swallow". It can perform freely in a wide range of sound range and intensity, without feeling "hard", and has good controllability and large "reserve power". Just like a car with superior performance and powerful horsepower, the driver can fully enjoy the pleasure of driving... A good car can give the driver a feeling of oneness with the car, and a good piano can also give people a feeling of oneness with the piano. .

Expression is easy to master when making the erhu, but it is difficult to master the bass instrument. For example, the general Erquan instrument is prone to slow pronunciation and weak sound. It should be said that the expressive power of Erquanqin is the most difficult to grasp in erhu production.

Expression is a feeling that is difficult to express and can only be understood, and there is no standard or scale for measurement. Erhu makers and performers need to understand and grasp it.

5. When choosing Erhu, pay attention to its penetrating power

Another important indicator for evaluating the quality of Erhu sound is "penetrating power". Penetration is the strength of timbre, tone quality and volume, and is an important intrinsic factor in whether the erhu is excellent or not.

My experience: Penetration should be reflected when the pronunciation of the Erhu to the vibration of the erhu are unified and harmonious. Vibration is the source of sound. There is no sound without vibration - a simple physical principle. After analyzing the structure and pronunciation principle of the erhu, it can be found that the sound of the strings is transmitted to the piano skin (vibrating membrane). At this time, the amplitude is large in the center of the piano skin and the frequency is low, and the amplitude becomes smaller and higher toward the edge; the vibration of the piano skin is transmitted to the piano tube ( Loudspeaker), at this time, the amplitude of the echo reflection vibration in the front of the skin is small and the frequency is high, and the amplitude becomes larger and the frequency becomes lower towards the back. The erhu makes a beautiful sound through the vibration of the piano skin and barrel and the vibration of the piano rod and holder.

In my opinion: the vibration frequency range of a piano with good penetrating power should be broad, the main audio frequency should be prominent, and the secondary audio frequency should be harmonious and coordinated. Just like a good stereo, the coordination of high, middle and bass makes the music Penetrating and infectious. Loud volume does not mean good penetration, and good penetration does not necessarily mean loud volume.

Good penetration is another important requirement for the craftsmanship and quality of erhu production.

There are many ways to test the penetrating power of a piano based on my own experience and feelings, mainly based on my own perception. There are two simplest methods: first, when trying to play the piano, hold the piano with your left hand and feel a strong vibration on the piano rod and the head of the piano barrel, so that the timbre, sound quality, and volume are coordinated; second, one person plays the piano, and the other person moves from close to the piano. Listen at a distance and listen to the pronunciation. The pronunciation has good far-reaching effect, the pronunciation is long, full and clear, and has strong appeal.

6. When choosing an erhu, you should pay attention to its artistic beauty.

A good erhu should be the combination of high-quality functions of the instrument and high-quality artistic beauty. That is to say, it is not only an instrument with perfect timbre, sound quality and volume, but also a piece of art that is pleasing to the eye and has collectible and ornamental value. It makes people feel comfortable playing it, sounds comfortable and looks satisfactory. Talk about some personal feelings about the artistic beauty of erhu production:

Production size specifications: the central axis of the piano rod and the central axis of the piano tube must be three perpendicular to the central axis of the two piano rods; the axis line of the piano rod and the upper and lower sides of the piano tube The axis line of the hole, the axis line of the bottom bracket and the axis line of the piano are five concentric, which makes the entire piano's sound and vibrating axis effects highly unified; the angles of the joints on the inner and outer walls of the piano barrel are accurate. Symmetry, the thickness of the board wall is symmetrical and uniform, the length is precise, and the arc is smooth, coherent, and smooth, making the vibrating sound of the piano tube balanced and symmetrical in frequency and transmission speed, effectively improving the purity of the sound quality.

The production structure is strict: first, the piano rod and the rod and hole of the piano tube fit accurately in place, and the tightness is just right; secondly, the piano rod hole and the hole and pin of the piano tube fit accurately in place, and it is not difficult to Twist without losing the string (the hole and the connecting surface of the stringer have reached a perfect fit); thirdly, the mortise and tenon of the piano rod and the piano base are closely matched and in place, and the piano base neither shifts forward or backward nor left or right. The holes, tenons, and eyes of the entire piano structure have reached high standards of strictness, solidity, accuracy, and tightness.

The production process is exquisite: from the processing of the skin of the piano tube to the clean and neat processing of the leather edge after skinning; the production and polishing of the piano tube's inlay and inner wall, and the molding of the piano tube shell. Polishing and precision are in place; carving and inlay work and modeling are meticulously carved; grooves, grooves, lines, arcs, bends, edges, corners, holes, tenons, and eyes of the entire instrument are processed with meticulous attention to detail, and all production processes are sawn , plan, dig, chisel, shovel, peel, file, drill, set, inlay, carve, engrave, engrave, spell, stick, roll, grind, polish, all interlocking, clean and neat, as the saying goes, "A layman can only watch the excitement." , an expert knows the way", the subtleties reveal the skill.

The production effect is beautiful: the production technology should make the erhu reach a high artistic beauty. With a good piano, you can see the spirit from a distance, see the form up close, and listen to the music with your hands. Erhu's connotation of superior timbre, sound quality and volume effect complement each other's smooth, beautiful and generous appearance. The effective string length between the string and the barrel must be designed reasonably so that the string tension, vibration frequency, and feel comfort are organically combined to achieve the best results in sound quality and feel. The film treatment and leather-wrapping process must be in place so that the tension and elasticity of the film are just right, so that the sensitivity of the piano, the stability of the timbre and volume, and the durability of the piano are organically combined to achieve the long-lasting and good sound quality of the piano. In general, a beautiful and good piano should be delicate when you look closely, grand when you look up close, and airy when you look at it from a distance. Erhu's sound, shape and spirit can achieve a harmonious and unified aesthetic and artistic effect.

7. Don’t rush for success when choosing a customized erhu

The sound quality of the erhu is closely related to stress and vibration. Why do old pianos sound better than new ones? Is an old piano better than a new one? The main reason is that in the process of adapting to the natural environment, the piano gradually eliminates the stress of the piano-making materials, and gradually forms a harmonious vibration in frequency and direction. It sings "in concert" and emits pure and beautiful sounds. The sound of the piano.

Speaking of stress, it is basically everywhere: manufacturing, construction, musical instrument industry, etc. Basically, all materials have stress, but in different ways. The most intuitive phenomena of stress include: thermal expansion and cold contraction, wet expansion and dry contraction, etc. Generally speaking, the existence of stress is harmful: mechanical deformation, house cracks, musical instrument cracking, etc. are all caused by stress. To give an everyday example: when a new "Poussin" car is started to be used, the chassis will always "pop" on its own. This is due to the generation and existence of stress in the steel during chassis manufacturing, and the stress is gradually eliminated during use.

Once the piano wood is cut, its critical surface changes. Coupled with the difference in dryness and humidity with the environment, and the change in the tensile surface of the wood fiber, the stress changes. The most obvious manifestation is warping. Curvature, deformation, etc., no matter how old the material is, stress changes will occur once it is cut, but there are differences in degree. Stress must be eliminated, and the best way to eliminate stress is to eliminate it naturally. The so-called "let it change enough" and then make it again.

There is a set of scientific and rigorous procedures in the production process of Erhu. There is a long production cycle from cutting materials to finished products, and its intermittent production process is actually a scientific process of continuously eliminating material stress and adjusting the maximum vibration of materials. To make a good piano, the material must fully "run in" with the natural environment and let the environment accept its arrival to achieve the best vibration and sound quality effects. The piano made after passing the test of time has fast sound, good sound quality, good quality stability and durability in the future.

So if you want a good piano, you have to be patient, "I can't eat hot glutinous rice balls in a hurry."

8. When choosing an erhu, you should pay attention to the "bucket board" effect

The water capacity of the bucket board is based on the lowest bucket board. The erhu is a "bucket". Shape, spirit, skin, material, and workmanship are all barrel staves. Under normal circumstances, violin makers always take into account the balance of various indicators when making each grade of piano, just like making cars of different grades requires a balance of various configurations. Of course, it is inevitable that one item is better and another item is worse, and the violin maker makes up for the shortcomings by making up for the shortcomings. Unless the buyer has special requirements, generally speaking, it is better to balance the six aspects of "sound, shape, spirit, leather, material and workmanship". Otherwise, if a bad item drags down a good item, the overall effect will decline, forming a "bucket board" effect.

9. The key points for choosing Erhu are "sound, shape, spirit, leather, material and workmanship"

"Sound" - the key to choosing the erhu.

It is divided into three elements: timbre, sound quality and volume. The timbre is usually divided into rich, soft, bright, sweet, high-pitched, vigorous, etc., but it is not absolute. A piano often has all of them, but there is no unified one. You can choose according to your personal preference. Sound quality is often measured in terms of purity, mellowness, and thickness. A piano can also do both. The volume is often divided into loud, moderate, and low. When the thickness and tightness of the piano skin are the same, the one with the louder volume is better. It is not advisable to have loud volume but lack of concentration. To analyze the development trend of the volume, the volume of tight-skinned and thick-skinned ones gradually increases with the playing, but this is not the case with thin-skinned and loose-skinned ones.

"Shape" - the physical beauty of the erhu. The design is required to have a reasonable layout and beautiful appearance.

"God" - the artistic beauty of Erhu. The connotation has high acoustic quality, which is reflected in excellent expressive power and strong penetrating power; the denotation is that it looks impressive when viewed from a distance, grand when viewed up close, delicate when used, showing aura, and it is quite like a bird clinging to people, and the human being and the piano are one. feeling.

"Skin" - The skin is best taken from the tail of a young and mature python. Especially those with good skin tension and elasticity, uniform scales and neat texture, smooth and shiny skin and clear color are the best.

"Material" - usually high-end pianos are made of old mahogany, rosewood, and ebony. The so-called old rosewood material for old furniture is basically not available in the market. Selection of piano materials: The wood should be diameter-cut with straight texture, no knots, no damage, no decay, no repairs, high and uniform density, consistent color, and coordination is the priority.

"Work" - fine production technology, accurate dimensions and tight structure. Different luthiers have different production process characteristics and different production forms. You can choose according to your personal preference.

The above is a summary of the requirements for choosing a piano. The criteria for selecting a good piano can be explained by the six words "sound, shape, spirit, leather, material and workmanship".

10. Pay attention to "new pianos produce familiar sounds" and dyed leather

There are often new pianos from manufacturers and merchants. Once you play them, "new pianos produce mature sounds", usually two or three times. There are several reasons: first, the skin is too loose, and if the skin is loose, it will have no staying power. The good times will not last long and will soon go downhill. This piano is not advisable. The second is to use artificial methods to promote sound production. One of the simplest methods is to rely on the "cooked sound" produced by pressing. Put an object on the piano skin, then cover it with a plate, and apply pressure again. It only takes a day and a day. That's it. For a piano that relies on pressing to produce familiar sounds, the tensile elasticity of its membrane fibers has been damaged to varying degrees, and its lifespan is short and its stamina is poor. A common identification method is that there is a sunken round pit under the base of the piano, so pay attention to it when choosing a piano.

Some new piano skins are brightly colored. Please note: There are many erhu piano skins on the market that are dyed, which has become an open secret or a public nuisance. There are many dyeing methods, usually using oil-based dyes or It is dyed with chemicals, so be careful not to be fooled by the color when choosing a piano.

11. When choosing Erhu, pay attention to carefully identify its authenticity

The development of the market economy has driven the development of the cultural industry, and the development of the cultural industry has driven the development of the Erhu industry. The market has a strong interest in Erhu. Growing demand has spurred the development of the erhu production industry. To a certain extent, the drive for profit has induced and encouraged the production of fake and shoddy erhus. The phenomenon of fake and shoddy erhus is becoming more and more common. When purchasing erhu, you still need to pay attention to the following types of instruments:

1. Paste Branded pianos are usually purchased from some musical instrument stores or piano shops from Erhu workshops with poor brands and poor market conditions (manufacturers and workshops with genuine brands and excellent quality will never make OEM pianos for others), and have their own store number engraved on them. , trademarks to sell. Such stores and shops often advertise themselves as front shops and back factories (workshops). In fact, they generally do not have the ability to produce erhu. Some shops and shops also display some raw materials, a few semi-finished products, and a few tools. Put on a show. Ordinary customers are often confused at first glance and believe it to be true. This type of OEM piano is very tempting and deceptive to online friends, foreign friends, and unsuspecting friends.

2. For famous pianos, some manufacturers and workshops usually join forces with some celebrities and masters in the Erhu world to make some pianos engraved with the words of celebrities, famous masters, producers, appraisals, etc., and then add some certificates and cards. There is no way to verify the authenticity and quantity of such instruments. It is often the producer who makes false claims, and the appraiser has no way of verifying the authenticity of the piano. It has a long history. Anyway, the price of the piano is high, and the wool comes from the sheep. It is a win-win situation for the manufacturer and the celebrity. This type of piano has great influence on Hu friends who like to pursue celebrity effect. Very tempting and deceptive.

3. OEM pianos. This type of pianos is now showing a trend of continuous expansion. Currently, some Erhu masters, teachers and some Erhu enthusiasts are keen on this! These famous masters, teachers, and Huyou experts Some semi-finished products are ordered from some workshops with poor reputation and poor market, which specialize in doing processing work for others, and then assembled. Some simply take the erhu with everything already made and packed with accessories. The first thing above is that a computer must be used. The engraving machine carved these patterns with the words "Exquisitely Refined". This kind of people turned into "luthier makers" overnight. Some even set up a room with a few objects, tools, etc., and some wrote "*** Erhu Studio" and so on. Generally speaking, after doing it, you can really show off your erhu, deceive people, and some even sell some erhu. Occasionally, I also found that some uninformed Hu friends believed it to be true, thinking that they had really met a master or a famous qin player. To use a jargon in Suzhou's erhu production industry, this kind of person is called "falling the world." There are several common websites where people like this perform their performances from time to time: they upload a few pictures of erhu. Today I will tell you about the exquisite erhu that I just made. Please enjoy it. Tomorrow, I will post some pictures about the newly developed and exquisite erhu. Please watch the erhu, which makes it quite impressive and startling, and then invites people to support, support, blow and stir up the atmosphere. In the end, the word "sell" is indispensable! Since it is "high-quality, top-quality", it is quite expensive. The price! In fact, many Hu friends have already seen the fox's tail - in the Erhu pictures uploaded online, it is obvious that there is an OEM - Suzhou area and manufacturer code number, etc. are computer-engraved! ---On a certain erhu professional website, there were many comments about Hu You's piano skin, calling it a deer or a horse: "Your piano skin is the first five pieces of python skin below the anus!" It was a huge joke that made the whole world laugh out loud. Come on! Later, the confused moderator of the Erhu Practice Room in Taiwan couldn't stand it anymore and came forward to correct him: "This piano skin is the first piece of python skin above the anus"! Where is the violin maker who doesn't even know whether there is skin below the anus of python skin? What?

OEM piano workshops are currently mainly located in the south, with a small number also existing in the north. They have complete facilities from shell making, inlaying, covering, engraving, numbering, engraving to packaging, erhu collection certificates, etc. One-stop service, we can also produce semi-finished products, large semi-finished products, finished products, etc. according to the requirements of the customers. The service is considerate and comprehensive. At present, the team of those who are willing to resell OEM pianos is growing and growing like a spark that can start a prairie fire. These people often conduct sales business contacts through virtual means such as online, email, and telephone. Many friends who know the details are jokingly called: "virtual production (piano) master", "online production (piano) master", and "selling old people from across the mountain". cattle business”.

The trend of OEM reselling is currently developing rapidly and has spread to accessories and other aspects. Except for Erhu strings, no one has found anyone doing OEM reselling yet, and other products are common: such as rosin, piano keys, etc. It is reported that there are still people who want to manufacture and imitate the hot-selling patented product made in Taiwan - the steel butterfly erhu mute. Some people are even thinking about patented products. Someone mixed some red, green, blue, and black colors into the very common raw material rosin, and the price rose sharply. It was blown into the best red, green, blue, and black gem rosin with a gorgeous name! The piano code was even more popular. It is colorful, colorful, cloudy, mountainous, foggy, and all kinds of nonsense, etc. These OEM accessories have neither scientific research theoretical basis nor production process technology content. What's more, what is invented today, what will be developed tomorrow, and what will be created the day after tomorrow? The materials are really more precious than dragon liver and phoenix brain, and the results are really unprecedented and unparalleled. But in the end, the key point is One---the word "money", it is often seen that Hu friends who don't know the inside story fall into the trap. You need to know how much effort and time it takes to research something. Some take decades, and some reach the current level after generations of unremitting efforts. There are no shortcuts in the scientific research of erhu and accessories. Shortcut---Can OEM and reselling of Erhu accessories achieve both fame and fortune? Nowadays, the number of celebrities and ordinary people engaged in OEM and reselling of erhu accessories and other such things is increasing day by day, and the team is growing.

OEM has brought about the opposite but parallel development trends of simplification and complication: on the one hand, it is precisely because of the emergence of OEM products that some people want to be "music makers". On the other hand, it is precisely because of the emergence of OEM products that the work process of most Hu friends in identifying authentic erhu and accessories has become complicated.

4. Famous masters’ erhus. Currently, there are only a few erhus produced by famous masters, and their production volume is even less. They are highly sought after by the market. Some famous luthier makers are old and frail, in their old age, and have no ability at all. However, there are only a small number of their new pianos sold in the market. This is driven by the temptation of profit. It is the small quantity, high price, popular market and large profits that have given rise to this type of piano. Its origins are: There are several aspects: first, the violin maker around the master selects a few harps from the ones he made, and engraves (brands, embeds) the master's name on them; second, the master himself selects a few erhus from the violin makers around him. , and then engrave (brand on. embed) the master's own name; third, the master asks someone to process it himself or just cover it with skin and engrave (brand on. embed) the master's own name. Although this kind of piano is not made by a master in one go, it has a little bit of the master's spiritual energy, and the quality is not bad. The price of the piano is of course extremely high. Some masters have been unyielding and proud all their lives. Now they are in the wave of the market economy. Although they are unable to do what they want, they have no choice but to follow the trend for a few final flutters. This type of erhu is rare and has many buyers. It is quite tempting for Hu friends who collect Xihuan, buy erhu for fame, and have a lot of money.

5. Ming and Qing dynasty old materials. Looking at the Erhu market, you can find that there are quite a lot of erhus with the words "Ming and Qing dynasties old materials" engraved on them. You must know that these "Ming and Qing dynasty old materials" are produced by some manufacturers. A very good selling point for the workshop to make and sell pianos! Everyone knows that the erhu made of old materials from the Ming and Qing Dynasties is good, so they engrave more "high-quality erhu made from old materials from the Ming and Qing Dynasties" into their products to achieve both fame and fortune. Take a closer look at some of them In the "Boutique Erhu with Old Materials from the Ming and Qing Dynasties" produced by the manufacturer's workshop, it is not difficult to find that there are actually very few real old materials, and most of them are made of new materials and pigments! For the so-called old materials from the Ming and Qing Dynasties, the two are clearly distinguished and cannot be confused: Ming Dynasty Old materials: mainly red sandalwood and huanghuali, mostly used by emperors, dignitaries and dignitaries. They are precious and rare. Now they are mostly collected as precious cultural relics. Who would be willing to make a piano? Who can do it? It should be emphasized that the old materials from the Ming Dynasty did not contain rosewood wood. Old materials from the Qing Dynasty: In the imperial homes of the early Qing Dynasty, there were still some leftover red sandalwood and huanghuali materials from the Ming Dynasty available. In the middle and late Qing Dynasty, rosewood wood was the main material. Since the Ming Dynasty had already consumed red sandalwood, huanghuali and other woods, the middle and late Qing Dynasty mainly relied on importing rosewood and other rosewood from Southeast Asia. Therefore, the old mahogany (rosewood) used for making erhu is currently on the market. ) are mostly old materials from the late Qing Dynasty and the Republic of China, and there are very few old materials from the mid-Qing Dynasty. I often come into contact with old materials and pianos made of old materials, and I know a little bit about the common sense of identification. A brief introduction: Generally, the comparison between old materials and new materials: the specific gravity of the material is smaller, the audio frequency is lower (the fundamental frequency of the material), and the sound wave is longer (the fundamental frequency of the material). Frequency), the material is a bit harder, the material is a bit brittle, the brown eyes are a bit bigger, the crystal points in the brown eyes are a bit brighter, the sound is rich, loose, soft, round, etc. As old mahogany (old furniture material) is becoming less and less available, some people are now looking for another source of materials: many old Vietnamese house demolition materials have been used in the production of old erhu, and some luther makers have used old Vietnamese house demolition materials with Old furniture materials are lumped together, and it is difficult for ordinary laymen to distinguish them. In fact, the price of old house demolition materials in Vietnam is several times cheaper than that of old furniture materials, and the materials are quite different. Vietnam’s old house demolition materials and old furniture materials are quite different. There are also methods of identification, which can usually be distinguished from the specific gravity, density, color, texture, etc. of the material.

6. Rosewood piano and rosewood wood are currently precious piano-making materials, which are mainly imported from India. Due to large consumption and India restricting exports, the price of rosewood wood is constantly rising, doubling several times in a few years. , the price of the erhu made of red sandalwood is also skyrocketing. Profit-driven forces have made counterfeiting of red sandalwood piano materials more and more common. It has been found that some violin makers refer to wood stained red and purple as red sandalwood. Relevant professional information: In addition to rosewood, there are currently nearly 20 types of wood that contain purple pigments after testing, but none of them are rosewood. At present, many of the purple-red erhu materials are called sandalwood: rosewood, Venus rosewood, golden rosewood, Indian small leaf sandalwood, big leaf sandalwood, No. 2 rosewood, No. 3 rosewood, rose sandalwood, blood sandalwood, etc.

There are even striped ebony that is out of reach of the red sandalwood pole and has been pushed to the throne of "old material and old red sandalwood erhu"! And the people who buy the piano really believe in the concept of "old material and old red sandalwood erhu". , he just twisted his neck and showed off the piano everywhere, which made all the Hu friends unbelievable. The identification method of the red sandalwood piano is more complicated. It can be distinguished from the texture, color, specific gravity, smell, brown eyes, crystals, fundamental frequency, etc. of the material. Hu friends who do not have certain identification ability should pay more attention when buying the red sandalwood piano.

Postscript: This article is based on the experience and lessons learned by myself and my friends in purchasing pianos over the years, especially the lessons learned from being deceived at a heavy price. Xiyue celebrated when she saw Ruyi's genuine erhu, and she also sighed when she was "fooled" to get back a low-quality and high-priced erhu. There was also anger and self-blame when she encountered a fake and shoddy erhu... I have tasted the sweetness, sourness, bitterness, spicyness and astringency of Qingqin. I will never forget the sadness, joy, sadness, joy and resentment of Qingqin. I have experienced the hard work and hardships of Qingqin. This article specifically collects and organizes some issues that should be paid attention to when buying a piano, and discusses with everyone the common sense of identifying fakes, vigilance against counterfeiting, and thinking about identifying fakes. I hope everyone will stop paying "tuition" like others, and don't follow the footsteps of their predecessors. Keep your wallets tight, keep your eyes open, be careful of being "fooled", and think twice before you act. The road to buying a piano is full of twists and turns, so be cautious. I hope everyone will be careful when buying a piano, have fun playing the piano, worry less about raising the piano, and have a smooth playing experience. I would like to share my experience with my friends and my simple opinions with everyone. Here, I would like to express my heartfelt thanks to all the Hu friends who have always given me care, support and help!

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Last modified on 2007-05-02 22:08