To all musicians; procedures like music mastering, audio mixing and song publishing sound very interesting. Have you all ever realized about there are some terms that are related to music and without them, it is not possible to publish even one single song? Each of the mastering engineer having good knowledge about the terms like Metadata embedding, UPC/EAN codes, QC and ISRC codes. They are very important when you are dealing with sound engineering. Without ISRC codes embedded on CD (DDP master) you won’t get your royalties.