For the industrial duplication of a CD a DDP image is required as pre-master. In addition to the sequence of the songs and the pauses between them, metadata for the CD release are also defined in this image.
Metadata for the DDP image
In addition to metadata such as artist, song title, genre, etc., there is further information that can be integrated into the DDP image. I generally recommend the integration of all codes that make up a professional CD release, these are
Labelcode – professional publicity, indicator for broadcasting rights
GTIN – 13-digit barcode number, mandatory for online distribution, identification per product, marking for distribution of income
ISRC – mandatory requirement for online distribution, identification per track, marking for distribution of revenue, marking for royalty statement, fixed component at GEMA, AUME, SUISA, GVL
If a label is published under a label, it normally takes care of the creation of a so-called labelcopy, which contains all mentioned information. If you do not publish under a label, I recommend providers like e.g. zoundr.com. They offer the pressing of your CD release and take over the role of a label for you free of charge by providing you with all mentioned codes.
Revision with DDP-Player
Before the DDP image goes to the press plant, you should check it carefully. For this purpose I will send you a DDP player with your integrated CD release. In this player you can check and reproduce all behaviours of your later CD.