We also accept regular audio files (typically WAV or AIF format), and there's nothing wrong with using those to assemble the CD. On the other hand, DDP files have a significant amount of error correction built-in, preventing errors from making it to the final finished product. Those errors get included in the manufactured CDs as well. The disadvantage is that if your original CD master contains any data errors (which are quite common, just not easy to hear because the CD player "rebuilds" the damaged audio on playback using redundant information stored on the CD). This approach is still used today in many situations. In the early days of CD manufacturing, a CD audio "master" would be sent to the manufacturer, and they would create a glass master from that CD from which all of the copies would be made. Therefore it is recommended for critical applications when you have very specific artistic needs for the production. A DDP file allows the producer and mastering engineer to have complete control over all parameters for the CD. DDP files allow you to set all of the parameters for the CD, such as the exact gap between each song, the crossfades, and other information. DDP files are used when sending music to a CD manufacturer (also used for DVD formats). What is a DDP file, and what are the advantages?ĭDP stands for "Disc Description Protocol," a proprietary format developed by DCA, Inc. When you upload you will be allowed to upload the following file types:ĭDP (Disc Description Protocol) file type is the preferred method for audio duplication and should be available from the recording studio that recorded your content.
We accept the following file types for CD Duplication:
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