|DUPLICATION OR REPLICATION|
|Is there a difference?|
Although the discs may look similar, there are significant differences between Recordable CD-R discs (duplication) and Glass Mastered compact discs (replication).
A replicated CD is manufactured with microscopic bumps (ON) and valleys (OFF) to represent the two digital letters of the digital alphabet. A Glass master is used to produce a piece of nickel that acts as the stamper for the CD. Each manufactured CD would have a unique custom nickel stamper. The stamper has all of the hills and valleys of the Master CD on it, and is used to transfer the information to the finished disc in a molding process that molds plastic pellets (polycarbonate) to the finished product. Although these discs are all the same size and similar colour and shape as a CD-R, the underlying technology and manufacturing process differs tremendously. For a recordable disc, the digital letters ON (1) and OFF (0) are represented by holes that are burned into a layer of DYE on the CDR by a recording laser. The laser shoots this hole to represent an OFF (0) letter and leaves the DYE intact to represent an ON letter (1). This is why this process is referred to as "burning" a disc... i.e. the disc is actually being burned with holes by a laser in the photo-sensitive dye layer of the disc!
To recap: A "pressed" disc with music or video on it would be manufactured with the data imprinted right on the copies. A Recordable CD, DVD or Bluray disc is actually manufactured with a DYE that can be written to with a laser device. Before there were recordable discs, the original CD and DVD players were only able to PLAY discs and not WRITE to them. These players used lasers to read bumps and pits on the surface of the disc and convert the data stream to binary for a computer or a chip to translate into sounds, videos, images, etc. Recordable CD-Rs have the added ability to burn holes in the DYE of a recordable disc, thereby allowing small scale production of CDs and DVDs.
The question of burning versus pressing a Music CD is actually not a complicated one. Simply put, if you anticipate you will sell more than 500 discs during your lifetime, it is cut and dry…. Get your discs professional pressed! The cost will often be lower than burning CDs at this quantity. If you don't think you can sell (or even giveaway) 500 discs if your life depended on it, consider getting 50 or 100 burned discs made up. But remember…the advantages of a pressed disc are many… See below for five great reasons to Press your CD and not use CD-Rs:
Five reasons why you should Press your CD, not burn it:
Getting music track names to show up in various music players
If you have tried to create a Music CD, you may have noticed when you play it that the track names show up as "Track 1, Track 2, ..." or even with names you've never heard of before or never intended to use. Depending on the music player you are using, your CD will display differently. In order to get your tracks to display for everyone, you will have to use the following methods:
CD-Text allows you to use a simple CD-burning software such as Toast or Nero to specify the names of your tracks and album. Any devices that are CD-Text compatible will display this information when the track is being played. CD-Text typically doesn't work with Computer based Music CD players and other methods must be used based on the software you want your CD to work with.
Insert your CD into a computer and run the iTunes application. Click on your CD under the Devices section and the tracks should load in the player list. Select one track at a time and select File > Get Info from the menu. Change the information for the album, track, artist, etc, and click OK. Repeat this for each track. When you are finished, select Advanced > Submit CD Track Names and fill in the remaining details and click OK to submit your changes to the Gracenotes database. It may take a few days for information to be available to the world.
Windows Media Player
Insert your CD into your PC and run Windows Media Player. Select the CD from the media list. Right-click on the CD in the media list and select Find Album Info. When the information loads for the CD, click Edit. Make the changes to the CD as required and click Done. You may have to submit this information from up to 5 different computers before it shows up for everyone.