A DDP correspond to (Disc Description Protocol) is a file that is sent to CD manufactures that includes the entire image of the disc with all songs in order including any metadata like track titles, ISRC codes, album title, etc.
The benefit of sending a DDP file is that you can be sure in a 100% that everything is exactly as you want and doesnt have any issues. I will set the spacing between songs in the DDP and they will then be printed to CD exactly as intended.
DDPs are only needed if you are making CDs and if the distribution company or you are using. Please verify with them to see if they prefer to receive a DDP or WAV files directly.
DDP (For CD manufacturing)
TAX, Not Included