Wednesday, 1 May 2013

CD Duplication or Replication?

By Gary Fellows


Once you understand the differences between CD replication and CD duplication, you will immediately know which process you need. When you are having your project professionally created, your final decision will depend on three concepts: how many new CDs you need to make, how long you are willing to wait for them, and what level of sound quality you require.

When you need to make a lot of duplicate of one CD in one production run, CD replication is ideal for turning out high quality copies. This procedure should be performed with the help of professional-quality devices, to turn out a top-quality CD master. With this method, molds are made of original disc. The professionals, to make numerous CDs in one run, then use these molds. This method is typically only used for runs of 1,000 discs or more.

The master CD created for this process is very special. The original sound is introduced to a recording system. This system imprints a positive version of the sound onto a master that is normally made from glass and then transferred to metal. Once these malleable surfaces are imprinted with the recording, copies are made of them with a stamping system to produce negatives. These negatives then have injection molds made of them to create positives again.

CD replication turns out an extremely good quality of music. Injection molds can make a high volume of duplicates that are also covered with an aluminum film and some lacquer for protection. These also go through a hardening process under an UV light before they are ready to use.

Now, for a less complex procedure you may be able to use the CD duplication technique if you need less than three to five hundred copies. With this technique, a disc drive in a computer transfers the desired sound from the original CD. The recorded sound then is burned (transferred) onto a special type of CD to make an exact replica.

For this process, you may choose from three types of blank CDs. Older computers and stereo systems will only recognize CD-Rs as readable discs. Modern systems, including car stereos and DVD players, are capable of reading both CD-Rs and CD+Rs. Choose between the minus and plus as is applicable for your intended audience. CD-RWs mean that the CD is capable of being recorded over. Once the recording is made, it can be removed and replaced like an old VHS tape.

Occasionally, the duplication process will uncover a blank CD that was not properly created. These CDs will fail to record information at all on them. They will still be registered as blank when finished.

Although, the CD replication technique provides a slightly, very slightly, better end product, the cost can be high for low quantity runs. The CD duplication technique will not take long, is inexpensive, and turns out a very nice product.




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