Characteristics of genuine CDs

The name and trademark of the publisher are printed on the cover and center of the disc

CDs published in China are printed with the international code ISRC, such as CA-A01-94-572-001 [China started using ISRC code in 1994)

The cover generally prints the title of the track, the name of the songwriter, the time of the track, the lyrics, the instruments used, the composer and Performer's name

Publishing company's address, phone number, fax and other information

Engraved with SID code

Characteristics of pirated CDs

No title, performer names, etc. on CD

Famous singers or performers appearing under other record companies [records or illegal live recordings

Mispellings appearing on CD packaging, e.g. Misspelling of the artist's name or track [pirated or illegal live recording]

Photocopied or handwritten packaging [pirated]

No SID code or printed with a fake SID

< p>D version usually does not need to be produced (digital reprocessing), just copy the original version.

Assemblies, collections, and selections are just simple cuts from the original version.

The difference in sound quality between the original version and the D version is mainly the difference in production technology and raw materials. In order to control costs, the D version generally does not use the best polycarbonate.

In the production process, Generally, the injection molding cycle of optical discs is 3 to 5 seconds, but D-type manufacturers will speed up the operation of the machine to make the injection molding machine work in a small molding cycle. In this way, some optical discs will inevitably have information pits that are not full.

In terms of aluminum plating parameters during the vacuum sputtering process, manufacturers that pay attention to product quality will control the aluminum layer to a sufficient thickness according to reflectivity requirements. D plate manufacturers will plating the aluminum layer as thin as possible to save aluminum targets and save time. Therefore, when you look at some D-version optical discs against the light, you will find that the thickness of the aluminum coating is uneven and can be seen through. The reading performance of such optical discs is also relatively poor and the bit error rate increases.

Generally, in regular In some factories, 1kg of UV glue can coat 6,000 to 7,000 discs, while in some D-printer factories, 1kg of UV glue can coat far more than this number of discs. This certainly saves costs, but at the same time it causes the disc glue to The surface coating is substandard.

Online inspection is mainly a preliminary inspection of the optical disc. In this process, a linear beam of light will be emitted onto the optical disc, and then the optical disc will rotate, and the computer will detect the disc based on the reflection. The quality of the disc is judged by the light condition. If the quality of the disc is unqualified, the machine will automatically sort out the unqualified discs. If it is a D-printer, this process will be closed to save time. Moreover, the genuine manufacturer will also According to its own quality inspection procedures, a manual inspection is carried out on the optical discs that come off the line to ensure the quality of the optical discs that enter the next process...

Due to many reasons such as national conditions and pricing, the original version occupies a leading position in the country The rate is extremely low, but the D version is very successful in this regard, with fast speed and low price.

I remember that many friends around me who really love music do not regard the D version as their collection, because They found that when playing the D version on better equipment, there are also phenomena such as thin sound lines and inaccurate positioning. For works that cannot be put down, they can only go back and buy expensive original versions. This may also be the sadness of domestic music lovers.

For some time-sensitive pop songs, the D version is very cost-effective. As for collection, the original version is the best choice, although it may cost a lot of Money.

1 Requirements Before you want to buy a CD, you should check it online first. There are several songs written on the Internet and write down their titles. When you buy it, it should be the same as what is written on the Internet.

2 If the CD you buy is better than There are many songs on the Internet, so don't think that you are taking advantage, because it is pirated.

3. Look clearly at the label posted on the album you want online, such as Xingwen Chuan Dial Etc.

4 Be sure to go to a regular speaker store, not those grocery stores that sell everything, including CDs.

5 Make sure to read the prices clearly, as ordinary ones don’t. For 18 yuan, those 10 yuan two or three sets must be pirated.

I bought based on these points and have never been cheated by pirated products.

. Identify "Mei Card" Genuine version of "audio and video": genuine

The American Card audio and video version has the fake American Card logo on the front. Although there are pirated versions, the original logo shows star-shaped waves in reflection, while the pirated version shows arc-shaped waves.

2. Identify the genuine version of "Xinsuo Music": It is best to identify the genuine Xinsuo Music audio and video products, because the words "Sony Music" can be seen reflected on the outer packaging film of the genuine Xinsuo Music, while those without it are not. for piracy