1. Appearance:

Currently, the MP3 market, shape, appearance varied, alternative, traditional, Carttoon Mp3,MP3  With FM,Games MP3, Touch Screen MP3,Sunglasses mp3,camera mp3,MP3 Watch ... ... seems every brand has several other brands of products with similar shapes, so I chose them on the more difficult to start with, and this can only rely on your own feelings through!. However, the appearance of a product can be to a large extent determine its working conditions, poor touch, color bad products, its overall workmanship will not be good to go. At present the majority of MP3 products, have adopted ABS plastic shell is made of a small number of higher end products made of metal surface, use more paint process.

2.LCD display:
Popular MP3 players have LCD screen display, more intuitive way to control them easily. Of course, all have backlit LCD screen, the current multi-color backlight in blue-based. Currently on the market have emerged Bright-type show, but the prices are generally more expensive, but a higher power, there is no much practical value, if not the very pursuit of fashion, silver pocket can also Fang Dexia friends, they should not consider the matter. There are also some MP3 on the market products are not LCD screen display, so that, many of the features can not be achieved, to control them is not very convenient, but the price lower.

3. Supported languages:
For LCD screen display products, the English display is the most common, but friends are, of course would like to see the Chinese menu simple. The so-called support for ID3, refers to song name, artist can be displayed in Chinese. But the present, whether imported or domestically produced products, the majority of MP3 song names can only achieve the Chinese display, but the menu as well as the lyrics were still in English, in particular imported product, almost no support for the Chinese lyrics displayed.

4. Memory Capacity:
MP3 built-in flash memory capacity of a size, should be friends, the most emphasis on the parameters. It is like a computer's hard drives, determines how much you can store files. From the early 16MB, 32MB, to today's 1G, 2GB, 4GB and 8GB, and even large-capacity 16GB hard drive-based MP3, MP3's development will move toward a greater memory capacity development. But the current market leading products or 8GB. In general, we often use a 128Kbps compression rate of the MP3, the first space of each is about 3-5MB, with its current mainstream 128MB of memory, can store about 30 songs, it should meet the needs of friends. To speak to MP3 is now the operating system, storing songs too, find them very troublesome, so if small pockets of silver, then, or do not choose too much capacity of the product, at worst it wants to regularly update the songs.

5. Supported formats:
MP3 format is the most commonly used, and it supports sampling rates of 44.1KHz, you can use the bit rate is normally 8-256Kbps. MP3 products of different sampling rates and bit rates supported range varies, of course, support the broader the scope the better, for the sampling rate, better products can support to 48KHz. For the dynamic encoding VBR, you can also makes the same sound quality for smaller files, some machines can not support.
WMA is Microsoft's promotion of a format, compression ratio is generally 5-192Kbps. Under the same sound quality, WMA to MP3 format than the smaller and, therefore, have this feature, MP3 player, is in effect increased the amount of memory. Would also like to remind my friends that use Windows comes with WMP compressed files, you need to get rid of copyright protection options, or to come out of the WMA files can not play MP3's; downloaded from the Internet through encrypted WMA files are Therefore, with support for WMA player may also appear not play situation.
For other formats, such as ASF, WAV and so on, are not easy to use MP3 and WMA formats, from a practical point of view, is not indispensable.

6.FM FM Features:
A lot of MP3 products on the market in order to enhance the capabilities developed in the machine, FM function, can receive FM receives regular FM radio programs, and can be preset number of radio stations, and even radio stations to record the music. This is like a friend who listened to the radio program is a very good creation, but are not interested in listening to the radio users who choose expensive with a lot of the FM function of MP3, nothing is necessary.

7.EQ settings:
Shall be sound settings. Almost every product will have several models have been preset audio settings, such as normal, rock, jazz, pop and classical. Some MP3 also support custom sound settings, users can customize according to their preferences. But no LCD screen display of products, these EQ settings is almost non-existent, and only a sound model of its own cure. This love of loyalty to some particular individual sound effects, some of the friends becomes cruel. 8. System programs: MP3 of the system program, the machine is very important, it can solve all the MP3 to use in the process of software problems, for the stability of the system will play a vital role. In addition, some of MP3 products can be upgraded via firmware to solve some BUG, or add some new features, so if able to support this feature on the best. Of course, with the manufacturers of the firmware there is a lot to the development of speed.

9. Frequency response range:
Human ear can hear the voice frequency range is 20-20000Hz, below 20Hz and above 20KHz voices are not out of the human ear to distinguish. However, the range of frequency response between 50Hz to 18KHz, it should already be in the current MP3 should be able to reach the scope of this frequency response. However, frequency response range and sampling rate is different, we should not confuse.

10. SNR:
Sources that produce the greatest signal to noise ratio without distortion audio signal strength and the intensity of the noise at the same time the ratio between, usually "SNR" or the "S / N" that is a measure of speakers, headphones and other sound equipment, an important parameter. For MP3 it is also a critical parameter. "SNR" general use decibels (dB) as a unit, said audio signal to noise ratio the higher the better equipment. Generally speaking, at least to select more than 60dB signal to noise ratio in the products. But as yet there is no formal testing organizations to evaluate the product signal to noise ratio, so some poor quality of the MP3 product description is also marked with a high signal to noise ratio, which can only rely on your own ears will tell. MP3 play any audio signal in the absence of, if you can hear the more obvious the "buzz" or "hissing" sound similar currents, indicating the machine-noise ratio is too low, not suitable for purchase.

11. Recording function:
The current MP3 products, most of them have a recording function, which includes recording external sound, recording, FM programs, transcription CD and other audio devices. Direct recording external sound effect, how the present situation is not ideal; transcription other devices to play sound, there are also significant effects of defects. The MP3 recording is currently able to make more use of MP3, WMA format for recording, but its code computing power is not strong, sound is not good; some use the ADPCM format, which is a complex encoding format, the sound quality can not be considered good, but it It can make the file smaller and recording with this format, you can store longer recording information.

12. Repeat function:
In order to meet the students learning a foreign language users, MP3 manufacturers in the machine set up repeat function, support for AB between two points of a simple repetition. This student users, it is more necessary.

13. Battery:
In order to MP3's slim, many manufacturers will be Li-ion battery built in MP3 player, charging through the USB interface. While this saves the cost of buying batteries, but many often spend long hours without charge, and makes enough electricity can not be used, especially in the long journey, such a situation is actually quite embarrassing. Use of dry batteries of MP3 products, the volume slightly larger, but they can always replace the battery, to ensure anytime, anywhere to enjoy music without restrictions on capacity (after all, batteries are sold everywhere, Well). Turning to the battery, it can not fail to mention the MP3 power consumption issues. Many MP3 claim a AAA battery to use long long, which are used in a particular environment, using specific tests to the battery, but some of the data provided by water companies large and even false suspect. Friends who purchase their own determination of what can be found that too much consumption of products, you can request a replacement.

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