At present, there are MP3s in various shapes and appearances on the market, such as alternative, traditional, silver, black, red and purple ... It seems that each brand has several products with similar shapes to other brands, so it is difficult to choose, and you can only rely on your own feelings. But from the appearance of a product, we can judge its workmanship to a great extent, and the overall workmanship of a product with poor feel and bad color will not be much better. At present, the shells of MP3 products are mostly ABS engineering plastics, and a few high-grade products are metal, and the surfaces are mostly painted.
2. LCD:
Nowadays, popular MP3 players have LCD screens, which are more intuitive and convenient to operate. Of course, the LCD screen is backlit. At present, the color of backlight is mainly blue. At present, there are still color displays on the market, but the price is generally more expensive, but the power consumption is higher and the practical value is not great. If it is not very fashionable, friends who can put money in their pockets should not be considered. There are also some MP3 products in the market that have no LCD display, so many functions cannot be realized and the operation is inconvenient, but the price is low.
3. Supported languages:
For products with LCD screen, English display is the most common, but friends certainly want to see simple and clear Chinese menu. The so-called support for ID3 means that the song title and singer can be displayed in Chinese. However, at present, most MP3 players can only display Chinese song titles, but the menus and lyrics are still in English, especially the original imported products, which hardly support the display of Chinese lyrics.
4. Memory capacity:
The capacity of an MP3 built-in flash memory should be the most important parameter for friends. It is just like the hard disk of a computer, which determines how many files you can store. From the early 16MB, 32MB to the present 64MB, 128MB, 256MB and a few 5 12MB, there is even a very large hard disk MP3, and the development of MP3 will move towards a larger memory capacity. But at present, the dominant product in the market is 128MB. Generally speaking, we often use MP3 with the compression ratio of 128Kbps, and each song takes up about 3-5MB. With the current mainstream 128MB memory, about 30 songs can be stored, which should meet the needs of friends. Besides, there are too many songs stored in the current MP3 operating system, which is also very troublesome to find. So, if you don't have much money in your pocket, don't choose products with too much capacity, just update your songs frequently.
5. Supported formats:
MP3 format is the most commonly used, it supports the sampling rate of 44. 1KHz, and the code rate that can be used is generally 8-256Kbps. Different MP3 products have different support ranges for sampling rate and bit rate. Of course, the wider the support, the better. For sampling rate, better products can support up to 48KHz. For dynamic coding VBR, the file size can be smaller under the same sound quality, which is not supported by some machines. WMA is a format promoted by Microsoft, and its compression ratio is generally 5- 192Kbps. Under the same sound quality, WMA can be smaller than MP3 files, so an MP3 player with this function is equivalent to increasing its memory capacity in disguise. Also remind friends that when compressing files with WMP that comes with Windows, you need to remove the copyright protection option, otherwise the compressed WMA files cannot be played on MP3. WMA files downloaded from the Internet are encrypted, so it may not be played with WMA-enabled players. For other formats, such as ASF, WAV, etc. They are not as easy to use as MP3 and WMA formats, and are dispensable from a practical point of view.
6.FM frequency modulation function:
In order to improve the function, many MP3 products in the market have developed FM FM function in the machine, which can receive FM FM programs received by ordinary radios, preset multiple radio stations, and even record the music in the radio stations. This is a good creation for friends who like listening to radio programs, but for users who are not interested in listening to radio programs, it is not necessary to choose MP3 with FM function, which is much more expensive.
7. Equalizer settings:
Is the setting of sound effects. Almost every product has several preset sound effects settings, such as normal, rock, jazz, pop and classical. Some MP3 players also support custom sound settings, which users can customize according to their own preferences. For products without LCD display, these EQ settings almost don't exist, only curing their own sound mode. This is a bit cruel to some friends who are particularly loyal to personalized music effects.
8. System procedures:
The system program of MP3 is very important to the machine. It can solve all the software problems in the use of MP3, and it will also play a vital role in the stability of the system. In addition, some MP3 products can solve some bugs or add some new functions through firmware upgrade, so it is best to support this function. Of course, this has a lot to do with the speed at which manufacturers develop firmware.
9. Frequency response range:
The frequency range of sound that the human ear can hear is 20-20000Hz, and the sound below 20Hz and above 20 Hz cannot be distinguished by the human ear. However, the frequency response range is between 50Hz and 18KHz, which should be enough. At present, all MP3 players should be able to reach this frequency response range. But the frequency response range and sampling rate are different, so don't confuse them.
10. Signal to noise ratio:
Signal-to-noise ratio (SNR) is the ratio of the maximum undistorted sound signal intensity generated by a sound source to the noise intensity emitted at the same time, which is usually expressed as "SNR" or "S/N" and is an important parameter to measure the pronunciation equipment such as speakers and headphones. For MP3, it is also a key parameter. "Signal-to-noise ratio" is generally measured in decibels (dB). The higher the signal-to-noise ratio, the better the effect of audio equipment. Generally speaking, at least choose products with signal-to-noise ratio above 60dB. But at present, there is no formal testing organization to evaluate the signal-to-noise ratio of products, so some inferior MP3 product descriptions are also marked with high signal-to-noise ratio, which can only be verified by our own ears. When MP3 doesn't play any audio signal, if you can hear obvious "buzzing" or "hissing" sound similar to current, it means that the signal-to-noise ratio of this machine is too low to be purchased.
1 1. Recording function:
At present, most MP3 products have recording functions, including recording external sounds, recording FM programs, and transcribing the sounds of other devices such as CDs. The effect of directly recording external sounds is not ideal at present; Transcribing the sound played by other devices also has great effect defects. At present, MP3 and WMA formats are mostly used for recording, but the coding operation ability is not strong and the sound effect is not very good. Some use ADPCM format, which is a complex coding format with poor sound quality, but it can make files smaller. Recording in this format can store the recorded information for a longer time.
12. Repeat function:
In order to cater to students who are learning a foreign language, MP3 manufacturers have set up a repetition function in their machines to support simple repetition between points A and B, which is necessary for student users.
13. Mobile storage:
At present, MP3 players can be used as mobile storage, which is convenient for users to move files. Moreover, almost all MP3 players no longer need drivers (except Win98), and only a few MP3 players require to use their own management programs to upload and download files between MP3 players and computers.
14. Interface:
The products that used serial port in the early days are gone now. At present, all MP3 players use USB interface, which has fast transmission rate and supports hot plug and dialing. But USB 1. 1 interface is mostly used for MP3, and USB2.0 interface is rarely seen. There are also some special interfaces using 1394, which are extremely rare.
15. Battery:
In order to make MP3 slim, many manufacturers put lithium batteries in MP3 players and charge them through USB interface. Although this saves the cost of buying a battery, many times the battery is not enough because it is not charged for a long time, especially in long-distance travel, which is more embarrassing. The MP3 product of dry battery is slightly larger, but the battery can be replaced at any time, ensuring that you can enjoy music anytime and anywhere, regardless of the power limit (after all, dry batteries are sold everywhere). When it comes to batteries, we can't help but mention the power consumption of MP3. Many MP3 players claim that an AAA battery can last for a long time, which is tested with a specific battery in a specific use environment. However, the data provided by some manufacturers are too watery and even suspected of false reporting. Friends can test it themselves after buying it. If they find that the product consumes too much electricity, they can ask for a replacement.
When purchasing an MP3 player, as long as you pay attention to the above problems of 15, plus the care and patience of your friends, I believe you can definitely choose a good MP3 player. In addition, as the Spring Festival is approaching, many manufacturers are engaged in promotional activities, and the price is much lower than usual, which is a normal phenomenon. Friends who want to buy MP3 may wish to visit major electronic cities. I hope you can choose your favorite products.
Ipod abroad, iRiver is better, but the price is a bit expensive; Meizu in China has a high cost performance.
At present, there are MP3 players in various shapes and appearances on the market, such as alternative, traditional, silver, black, red and purple ... Some friends want nothing more than their appearance to attract people's attention and their personality to fly. What should such a friend pay attention to when buying MP3?
To have personality, first of all, you have to pay attention to whether the model you choose is a Volkswagen model. A simple way is to see if there are many other brands of MP3 players using this model. After choosing your favorite model, the next step is to examine its appearance.
At present, MP3 housings can be divided into plastic and metal. Among them, plastics can be subdivided into soft plastics and hard plastics. Soft rubber shell models are relatively rare, and one of them feels delicate and has anti-slip function; The other is to spray a layer of silver metal coating and polish it into a metal shell. Needless to say, everyone is familiar with hard plastics. Most MP3 players on the market are made of this material, so it feels normal. Usually, this kind of shell is polished to increase the surface reflectivity. The metal shell feels excellent, and etching and wire drawing processes are often used in manufacturing, which is full of aristocratic atmosphere. However, due to the limitation of cost and manufacturing process, it is currently limited to high-end products.
Pay attention to whether the paint on the fuselage is uniform and how it feels in your hand. If your handwriting is easily printed on the shell, it's indecent. See if the seams connected to the fuselage are tight. If you pinch them by hand, there will be looseness and creaking sound. Whether the touch of the fuselage buttons is comfortable and flexible, and whether the buttons are inconvenient to use. Those MP3 players with unique shapes may make the appearance of MP3 easily damaged in design, so you should pay attention.
LCD screen can choose color backlight or even color screen, which is generally more expensive and consumes more power. When checking the screen, pay attention to whether the LCD display is clear, whether the brightness of the color can satisfy you, and whether it will make your eyes feel uncomfortable.
A good MP3 player can't put on airs. Still need some common functions. You should check the functions you may need by the above-mentioned methods. MP3 is good.
Respondent: 2022km- manager level 4 1-26 13:27.
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[repost] MP3 walkman player has entered the homes of ordinary people after substantial price reduction and perfect functions. Many friends buy MP3 without a clear purpose. Faced with numerous shops and diverse products in electronic stores, it is quite difficult to choose, and it is easy to be deceived by JS(* merchants). In fact, the process of purchasing MP3 is quite simple. Reading and understanding the six points for attention in this article and putting them into practice can avoid being deceived by JS.
First, know the style and price, and choose the right store.
Before buying a product, you must remember to know the product situation and price in many ways, which is the first step in buying. Choose several suitable products through magazines or websites, combining the functions, styles and affordable prices you need. How to locate your choice and what kind of MP3 do you need? How to keep a clear head in the overwhelming advertising, we must beware of advertising traps!
For the parameters and prices of popular brand MP3 in the market, you can go to the Pacific MP3 product library. In the actual choice, some big brands' products are slightly more expensive, or the brand-name products with the same price have more complete functions. The author's advice to everyone is that it is best to buy products of big brands, so as to ensure the quality.
As for the parameters, remember not to fully believe the salesperson's introduction, because some salespeople don't understand it, especially things that can't be tested on the surface, such as chips. Therefore, it is very necessary to know the products you intend to buy in advance. When you arrive at the store, the sales staff should be more careful when introducing products with miscellaneous brands.
After all, online ordering is not very popular, so after selecting the required goods, it is necessary to start the preparation for on-site purchase, and it is very important to choose the right store. The big stores of well-known electronic stores often have a good reputation, but because there is not much information available, it seems more difficult to choose a store than the host. Here, the author gives you some suggestions.
1. Pay attention to some recommended businesses on websites, magazines and other media. Most of these businesses have strong strength and regular purchase channels, so after-sales service is guaranteed.
2. Large IT websites generally have news gatherers, and the store address and telephone number are left below the reports of many key products, which can be used as reference.
3. If you have selected a product, you can go to official website to inquire about the agent, sales channels and other information. Some MP3 companies' regional authorized sales points or flagship stores are marked, which is convenient for everyone to buy.
Second, check the main engine, including whether it is refurbished goods. After a period of preparation, everyone should know the price of a product, and then they can go to the selected store for actual combat.
The host of MP3 is the focus of investigation, so as not to buy refurbished machines and prototypes. In the process of investigation, we should pay attention to the exterior and never let go of a detail. First, check whether there are any wear marks on the outside of the host, and whether there are any used marks on the headphone jack and USB interface. If yes, it means that the product is probably a used old machine or a prototype that has been placed for a long time. In addition, the appearance inspection also includes screen protective film, anti-counterfeiting stickers and so on.
Secondly, the interior of the host is also one of the key points of inspection. Although the machine can't be disassembled on site, the main points such as the capacity of the host computer and whether it can be connected to the computer normally must be checked. In addition, most MP3 products leave the factory with empty storage space or only some test songs. If there are a large number of MP3 songs, folders and even other files in the MP3 player after online, then this machine is probably used, so be sure to pay attention to this.
Three, check whether the accessories and accessories are complete, whether they have been replaced.
After checking the host, you can't relax the quality inspection of MP3 accessories, because accessories are the place where JS loves to cheat. MP3 products are generally packaged with USB cable (maybe unplugged), earphone, charger, drive disk, etc. What accessories do you like for MP3 products? This knowledge point should be understood when preparing before buying. According to my own understanding, I can finish the "quantity" of accessories a priori by comparing the list of accessories provided by the product packaging box and manual.
Then check the quality of accessories. Some JS will replace the original headphones with low-grade headphones, even sell them on the ground, or replace them with bad headphones with the same appearance. Therefore, if possible, it is best to audition on the spot to prevent being cheated by JS. Because of the high price of the original accessories, many JS also like to replace the original accessories with some low-grade goods. It can be seen that checking the accessories is as important as the host.
Fourth, pay attention to whether there are promotional activities, whether there are price reductions, and whether there are gifts and coupons.
One thing to pay attention to when buying is whether this product has been reduced in price recently, adjusted in price and so on. There are many brands of MP3 products, and the price reduction activities are very frequent. Maybe we can check the price today and reduce it when we buy it tomorrow. Therefore, we should pay special attention to the promotion activities, price trends and timely quotations of the selected products to avoid being killed by JS because the information is not timely.
The promotion methods of MP3 include not only price reduction, but also gifts, coupons and other types. For example, if you buy a product in a limited time, you can get a charging set, headphones, small speakers and so on. Even if it is a gift you don't like, you can't take cheap JS for nothing. Be sure to ask. Many times, JS will not take the initiative to tell consumers that there are gifts when buying a product. Their idea is often to detain the gift before selling it, so we should also pay attention to this.
You should also pay attention to the convertible products, often new users have discounts, so don't miss the discount opportunity:
Verb (abbreviation of verb) price attack and defense-bargaining Although the approximate price is known online, there are still some deviations between the official guide price and the actual retail price. In larger chain stores, prices are relatively transparent and there is not much room for bargaining. However, in some smaller shops, the final delivery price of a high-end product of about 1,000 yuan may differ by several hundred yuan. How to minimize the price depends on the buyer's lip service, and the author can't generalize. Under normal circumstances, it is not a problem to buy a 500-800 yuan mid-range MP3 at the price of 30 to 50 yuan.
Remember to visit several stores before bargaining, because the location and purchase channels are different. Even in the same store or even on the same floor, the price of the same product may be different. If you can transfer to several stores and collect the lower prices and higher prices in the market, you will have a bottom when bargaining with JS. For example, the market price of an MP3 is between 500 and 530 yuan. Consumer a didn't visit the market much. After hearing the price of 530 yuan quoted by JS, he said, "Is it so expensive? How about 500? The online guidance price is only 5 10 yuan. " At this time, JS must be happy: "Rookie, I ate you." Then he will use all kinds of rhetoric, and finally negotiate a deal in 520 yuan. Under normal circumstances, it is no problem to cut it to 490 yuan.
Ensure after-sales service, check invoices, receipts, quality warranty, etc.
After the acceptance of the host computer is completed and the price is negotiated, JS can be paid and the invoice can be obtained. When some JS bargains, they will ask, "You can get three points cheaper without invoices. How about it? " In this case, you have to weigh it yourself. In general electronic stores, if consumers don't want invoices, they can ask merchants to provide receipts, which also has a certain binding effect. But the author believes that receipts without invoices are always formal. After the price is reduced to a certain extent, there is no need to be greedy for such a small price without issuing an invoice, otherwise it will be more troublesome for the merchants not to recognize the account.
Finally, check the warranty in the box. If you have a warranty certificate and invoice, you can enjoy a free warranty for a certain period of time. In case there is something wrong with the machine within the specified time, just go to the local designated maintenance point, which is a great guarantee for the quality of MP3. If you buy a brand-name product and there is no warranty in the box, you'd better go away.
Finally, if you meet a merchant who makes you feel excited to clear the goods or handle the prototype, then you should ask the after-sales service.
abstract
This is what you need to pay attention to when buying MP3. Actually, buying MP3 is the same as buying many products. The most important thing is to ensure low price, excellent quality and after-sales guarantee. To buy products with these three elements, coupled with the purchase strategy provided in this paper, can largely ensure the interests of our consumers.
In addition, some models have been sold in parallel, which can also be seen from the accessories. Everyone should pay attention to prevent merchants from selling you parallel imports at licensed prices.
Respondent: zdy _ human- trainee wizard level 2 1-26 13:27.
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Come to my QQ pat shop to buy it. QQ 1903005 17。
Respondent: 1903005 17- probation level 1 1-26 13:28.
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Brand (preferably a well-known brand)
2. Memory size (the actual space of MP3 is not the size of its own machine, because MP3 has its own things, I don't know, even the function takes up space).
3. Battery (buy an external battery, and buy the No.7 battery yourself. The built-in battery is too bad and troublesome. Batteries have a long life. If the battery can't be charged, it's very troublesome to change the battery, and there is static electricity built in. Listen, stop as long as there is static electricity)
4. Good quality
5. After-sales service
6. Ask for three guarantees when buying, as if the brand is different.